Category: Activity Report

The nighttime turned out to be a bit warmer than I expected, but having the full set meant my short wait for Grand was comfy. It was clear, but clouds were forming in the south and encroaching on the moon. Just as the first burst ended (at 9m30s), the moon went behind a cloud. I thought that that would be enough to get a second, but no such luck.

The next eruption of Grand was another one burst, and like so many these days, there wasn't much to distinguish it, other than Rift was well into an eruption and was still erupting as we left Grand. So time to head in and maybe get some more sleep and perform other overhead tasks.

Fan & Mortar, during and after

While taking a nap, the cloudiness turned into a show, which I missed. Later I had nothing much to do, and since it looked like it was going to clear up, decided to kill that time down at Fan & Mortar before going to Grand.

So I get down there and the three main Fan vents are active, but nothing spectacular. About twenty minutes later, they are all off. After a few minutes, Angle starts blipping, and after ten minutes of that, I figured I could safely leave. I never did see anything out of Main or Bottom, and the runoff from Bottom was non-existent, so it hadn't done anything recently, either.

So sitting at Grand about 50 minutes later, and look down basin and see a huge steam cloud rising to the right of Giant. So much for "safely leave." So F&M went from what looked like some sort of garbage mode to full eruption in less than an hour. Something to keep in mind for the future.

After Grand, decided to go down and pay my respects/curse those sputs. From the areas that got wet, looks like the wind blew everything to the south, inundating the bridge. The boardwalk from Spiteful north was dry, and there was no evidence of any surges hitting the walkway or gravel on the fly.

Looks like the trail repair crew got to see the eruption, and there was a ranger car parked there too. Then over at Link's runoff, I see this guy who looks like he's standing in the runoff. I yelled, loud, twice, and he finally got back on the trail. But two of the NPS's finest never seemed to notice me or care. They got into the car and drove off.

So got back to the cabin as the sky was starting to get dark and angry, but to the north. So of course the call that Beehive's Indicator came over the radio. I only took an umbrella with me, but with the strong wind, didn't expect to need it for protection from Beehive. Did need it for protection from the sky, as it started to sprinkle just before the Beehive eruption. The wind did nasty things to the height of the eruption, but one of the advantages of being next to the cone is that height is not an important factor. The roar of the jet escaping the cone is much more impressive, and it looks the same for the first 50 feet or so no matter the wind.

As it was, the wind soon died down. As Beehive dropped below about 30 feet and the eruption came to an end.

Grand again erupted after dark, and before the moon was up. Other than the total abandonment of a couple of dozen people when they realized that the 21:00 on the prediction was a start of the window and not an absolute prediction, there wasn't much unusual.

So I was a bit surprised to find Rift in eruption when I got out there just before midnight. West Triplet had just finished, it appeared, so this would have been a second Rift eruption with an interval of around five hours. (Or, a single eruption with a five hour duration.) In any case, Grand didn't even try to erupt until Rift had finished. Not only that, but it was not just cold, but there was a breeze, so even though it was a 7h14m interval, it felt much longer.

Grand start at Dawn

The next eruption made up for that. Another one Turban wait for another one burst eruption. Again the lighting was such that the top of the water jets at the start were all that were illuminated.

Penta and Old Faithful

This eruption surprised me. As I walked up to the Sawmill Group on my way to Grand, I saw a nice Penta minor eruption from the Top vent. It even put some water down the runoff channel. But Thumping Hole across the walkway, and the other holes like Oval were all down, so I figured that was the extent of Penta's attempt to erupt. So pleasantly surprised when Penta was seen in full eruption, my first of the trip. Grand of course made sure that I couldn't stick around, but as soon as Grand was over, I headed back.

Just after I took this photo, Penta just quit. One moment erupting, I look at the phone to turn off the camera function, look up and nothing's happening.

Beehive from Obs. Pt.

For Beehive, I decided to do something I'd not done before, and go up to Observation Point and see it from there. Only took me 18 minutes. The water column is plenty tall, but if O.P. is 200 ft. up, then Beehive came nowhere near being 200 ft high.

The next two Grands of the day were fairly undistinguished, although the sunset one was nicely lit, and even had two bursts.

After a cool day, I expected a clear night to be cold, and it was. The walkway got slippery by Sawmill, and it was ice by the time I got to Rift. But what I didn't expect was that West Triplet was in overflow.

For about 40 minutes I watched it by Maglight rising to overflow for about 4 to 5 minutes, then drop just enough to stop the overflow. This cycle lasted about 10 to 15 minutes each time. Percolator was quiet, and Grand had another short interval. Another overflow started with Grand, and this time it seemed there was a greater outflow of water. After about 4 minutes, it started thumping, even though the pool itself was quiet. Another minute, and West Triplet started erupting normally.

By moonlight Grand was nice, with the cold making for well defined steam clouds and a hint of moonbow, but it was just one burst.

After I'd just bicycled past the Cathedral on my way to the cabin, a coyote sing-a-long started. Sounded like two different groups yelping and whining and barking at each other, both somewhere in the trees beyond the cabins. It occurred to me as I pedaled that I was headed right toward them. But it all stopped by the time I reached the cabins.

In the morning came a report of Fountain in eruption that was more likely Morning in eruption. The heady fog caused my the cold made it hard to tell which was actually erupting, but the timing of known Fountain eruptions before and after are much more consistent with Morning that with several short Fountain intervals.

Late morning was clear and still cold. There was an occasional slight breeze, and when it was there, a jacket seemed required. Grand had another one of those long Turban delays. This time the overflow from Grand was so heavy that Grand actually "booped", boiled up to about a meter, twice before the overflow subsided. This is the first such activity I've seen in years, although it was quite common in the late 1980s and early 1990s. It's too bad that more geyser gazers weren't around to see it, as there are more than a few who need to realize that they are calling Grand starts too early.

With the cool air and no breeze, Grand's two bursts were both quite tall and impressive. During the start, the steam cloud kept rising faster than the jets, casting shadows onto water column until a higher jet came along.

Grand Rainbow

The later afternoon eruption was similarly picturesque, this time with a rainbow from Vent to Rift, due in part to the breeze blowing the spray to toward the southeast. Unfortunately, there wasn't a second burst to take advantage of the conditions.

Rift solo start

Then the third bit of weirdness of the day occurred. As I was walking away I realized I was hearing a familiar noise-- the start of Rift. Except West Triplet had finished an eruption well before I arrived for my two Turban interval wait. I looked, and sure enough, there were the vents of Rift starting to show water. A double-check confirmed that West Triplet was dry and empty as a view from the boardwalk permits. Percolator was also quiet. A truly strange situation, as for at least the last twenty years, as far as I can remember, every eruption of Rift started after about a half-hour of eruption by West Triplet, and usually with Percolator at its noisiest.

I haven't paid much attention to Rift this summer, but was also surprised to see the crack in the rocks to the left of Rift proper spitting and erupting. If it has been active, I've always thought of it as something that comes later, not within moments of the start of Rift. As far as I could tell, the Sputnik area was as dead as it's been all trip.

After midnight it was still slightly overcast. The moon was able to shine through an obvious layer of what was probably a smoky cloud, but that also did seem to have the side effect of keeping the night warm.

As it was, the wait for a nice two burst eruption was only one Turban interval. Despite the subdued lighting, it was also possible on occasion to see a slight moonbow in the steam.

In the morning, it cleared up, and was nicely calm for a sunrise Grand eruption. The shadows of the trees on the hillside were visible during much of the long one-burst eruption.

After that, it didn't warm up much, and the wind picked up so much that by the time Beehive erupted, a bit after 11:00, the water column was sent sideways across Geyser Hill towards Cascade. At least the direction was steady, and only the people on the corner by Plume had to evacuate due to the water.

Speaking of Plume-- one thing that hadn't been mentioned before, so it surprised me, was that Plume is not just dormant, but rumbling can be heard at depth. I've been around Plume dormancies before, but have never seen this sort of activity. No idea what it means,other than, along with activity by Little Squirt and Dome today, that Geyser Hill is messed up.

After the morning eruption, the average for the last twelve Grand intervals was 6h22m, with a range from 5h48m to 6h56m. That changed with the next interval, where Grand decided it was time to toss in an interval of over eight hours for no apparent reason, other than Rift did erupt. But Rift hasn't mattered much lately. We didn't have any delays, but the pool never looked good and Grand never seemed to want to try until the Turban eruption on which it finally started another one burst eruption. This one was short, only ten minutes, so a bit disappointing after the long wait.

In years past, having four Grand eruptions in one day was worthy of comment. The past few weeks it seems that is now the norm. In any case, the fourth Grand of the day came after dark, and just as the moon was becoming visible. At the start of the eruption, an orangish glow in the steam cloud was apparent. Then the tops of the highest jets were illuminated, more so each minute. A second burst would have been nicely spectacular, but there wasn't one. The interval on this eruption was just seconds short of six hours.

Spiderweb

I haven't moved the truck in a week, since I got back from Shoshone. In that time, a spider found the time to build a web between the antenna and the neighboring cabin.

Riverside Geyser

With last evenings excitement, I decided to forego the early morning one-burst Grand eruption (and that's what it was) and spend the morning playing tour guide. Part of those duties were to see an eruption of Riverside, which was actually pretty nice. Hard to see in the photo, but the backlighting and the lack of wind made for a nice eruption.

Also got to check out the effects of last night's Fan & Mortar eruption. The boardwalk north of Spiteful was still wet, and you could see the lack of footprints and bike tire track when the water from the Main Vent landed. While I was there, I saw several large splashes from Main Vent along with splashing from Bottom Vent while all the other Fan vents were quiet. I resisted to urge to get on the radio to report a possible event.

Just missed an Oblong eruption, but did get to see a nice Beehive eruption from Castle area. Also learned that Plume has not been seen all morning, so something put it to sleep.

A bit later got to Grand just in time to see a heavy overflow, but fortunately, it resulted in just a two Turban eruption delay. Like last night, and the early morning eruption, this was a long eruption lasting well over 12 minutes. During the final minute, Turban seems to have finished erupting while Grand continued on with its Big Sawmill impression. Vent and Turban were definitely off when Grand quit.

During the last few minutes of that eruption, Castle woke up from its overnight minor, and we got a nice display of the transition from water to steam after leaving Grand.

In the late afternoon the Sawmill Group was full looking good for Penta. At one point, the bottom vents started bubbling and even looked like they'd erupt when the Top vent took over and gave another Penta minor eruption instead. The cycle was short and neither Penta nor Sawmill erupted. The Grand eruption was another two-burst.

More tour guide duties got me to Fountain for the evening. It was extremely windy, and with the long duration of the prior eruption, it looked like little chance of actually seeing Fountain, which did finally erupt almost an hour after we left.

Did get to see a couple of eruptions of Morning's Thief, which can be quite impressive, with massive surges that remind me of other erupting pools like Oblong or Artemisia, but more explosive.

The clouds from the previous eruption must've stayed around for a while, as it was a warm night. There were still some visible off in the distance to the north, but nothing to interfere with the moonlight.

Another short wait for Grand. This time thought, it took 2-1/2 minutes from the start of Turban for Grand to finally decide to get going.

In the morning we had one of those times where everything happened at once. Grand had had a Turban delay when Beehive's Indicator was announced. So it looked like Beehive would be erupting first. I was down by Sawmill to catch that eruption, and also because Uncertain was steadily coming up to overflow and pushing out water. So within a matter of seconds. Uncertain started, then Beehive, then Grand. Makes note-taking a bit difficult.

And Grand punished the folks who abandoned it for Beehive by having two bursts. Following the second one, Turban quit almost immediately, but Vent refused to follow. For over a minute, it was erupting a thin jet to about a meter high. Finally it died down and joined Turban.

As part of my tour-guiding duties, when heard that Great Fountain was predicted for about an hour after the end of Grand, went down to see my eruption for the year. Was an your usual Adequate Fountain eruption, with some large bursts but nothing outstanding

Was taking a nap, or at least not doing anything when I was surprised by the radio call for the Indicator. The surprise was that I was expecting Beehive to be around midnight at the earliest. Ten and a half hour interval not unheard of, but still short. It was also the longest Indicator of my visit, at 25 minutes.

During all that, in comes the call that it looks like Fan & Mortar are finally having a real event. Since it was well over an hour before I'd expected to head out, I decided that I could just as easily kill time down there and maybe actually see it erupt. I was one of the first to arrive, since most folks were over on Geyser Hill, but within a half hour there were several dozen people out there, including a small group of tourists who had been out to see Riverside.

Which it did. It became apparent early on that this was not going to be like the pseudo-events of the past few days. We got a full Bottom vent eruption along with the coordinated huffing and splashing from Main vent. When the Fan vents came back on, they were all strong, and quickly built up to the point where High was erupting to at least 4 meters continuously, with Gold and Angle not a whole lot smaller. Finally, the eruption was initiated by Fan moments before Main kicked in.

The conditions, for a nighttime eruption, were perfect. The moon was at full, and high enough to illuminate the area. Once the initial playing of flashlights over the jets of water was over (and it took at least one person a while to get the message), it was possible to see moon bows in the jets coming from Main vent. Since there was no breeze, the only way to get wet was to go down into the target zone by Spiteful.

After that it was time for Grand, which was a bit anti-climatic. Again, the moon provided plenty of illumination. From the north end, the entire runoff apron was aglow from the reflections, and it was easy to see the surge in runoff head down from Grand's pool. The eruption itself started nicely, but was another of those that last almost 13 minutes. It was so long that Vent & Turban stopped within seconds of the end.

Was a nice moonlit night, and Grand decided to take advantage of it to have what passes for a long interval this summer, almost eight hours. (It's not the length of the interval itself, but how much time you have to wait from when you need to arrive to cover the shortest intervals.) Down the basin, toward Economic, I could hear what I think was an owl hooting. Been a few years for that. I was a bit disappointed when Grand acted like to was trying to erupt and I saw Riverside's steam cloud down basin, as that seemed like it would have been the perfect opportunity to have two Grand eruptions during a single Riverside interval.

Instead Grand waited a couple of more Turban intervals and began just after West Triplet started, and after letting Turban erupt for about two minutes.The moon was starting to head for the horizon, which actually made for a nicer eruption.

Came back in and decided I needed sleep more than I needed to be woken by chatter on the radio. Decided I'd risk the chance that Fan & Mortar would erupt in the next few hours, and so turned it off and set the alarm for 08:10.

So was a bit annoyed when my neighbors awoke me about two hours before that by slamming the door. Since I wasn't going to get back to sleep, I turned on the radio, and heard an announcement that Beehive's indicator had started several minutes earlier. Nice, but I wasn't in any shape or mood to run out. I think my neighbors were headed out that way.

It turns out they may have done me a favor. If I had headed out to Grand when the alarm had gone off, I probably would have watched the start from the bike rack at Castle. Despite getting there early, I didn't even see a full Turban interval, and barely had time to finish breakfast. It was a nice two burst with just enough breeze blowing the steam south so that the backlight was ideal.

Following Grand, noted that the Sawmill Group was high. Waited at Penta for a bit, as while the front vents and the vents across the walkway weren't looking great, Penta's Top vent was occasionally putting out water. After a few minutes, got an actual Penta minor eruption, with the Top vent going about a meter high and putting out planty of water, some of it into the bottom vents. Unfortunately, those vents never showed any inclination to join in, or perhaps it was because they were being used as drains, the minor only lasted a minute. Then activity shifted to Sawmill as it started eruption, and it was time to head in.

The next Grand took place after Rift had been erupting for more than an hour. Other than that, it was another unremarkable one burst eruption.

The next Beehive was similar, it was a twelve hour interval, but with a strong wind to knock the height down and to get much of Geyser Hill east of Depression wet.

At sunset a layer of clouds obscured the sky to the east and south, so the moon didn't contribute much light to the evening Grand eruption. But the sky itself was bright enough that we were clearly able to see the starts of both bursts.

Down at Fan & Mortar, it's my understanding that nothing much happened again today. Which means we are approaching several days since the last event there, and over a week since the last eruption.

By this morning the paper plate had disappeared.

The Grand eruption was the first three-burst for this trip. Occurred right as the sun was coming over the hill, so only the very tops of the second and third bursts were directly illuminated. The noon-time eruption was a two-burst so this day has already had more bursts that a four-Grand day last week, and there's one more eruption to go.

Fan & Mortar didn't erupt over night, and there wasn't an event witnessed all day. Overnight looks about right.

The evening Grand was also unremarkable, although it did wrap up a 7-burst day for Grand, bursts spread over three eruptions.

And I'm so tired of Donnie. I wish he'd just "go to five" and stay there so I don't have to hear that call every ten minutes.

Grand's Plate, before and after eruption

So it looks like the plate that went into Grand last night didn't make it very far out. And that two subsequent eruptions have not been enough to dislodge it. The eruption itself was a typical one-burst in dead calm, so quite pretty, but Grand made no attempt to even refill after that burst ended.

In the middle of the afternoon there was a minor event down at Fan & Mortar, but nothing much came of it. Of course I heard the radio call after I had returned to my cabin from taking a well-needed shower.

West Triplet was splashing away as I tied my bike up at Castle for the late afternoon Grand. Since it had been a while since the last known Rift eruption, wasn't surprised when it started. But what was a surprise was that Grand stayed up and high, and started having waves. It wasn't quite long enough to be considered a delay, but came close.

Final resting place for the plate

Before the eruption, the plate did get pushed around a bit by the wind, but it stayed in the general area it had been in all day. It seems that maybe the water it was in was keeping it in place, because after the Grand eruption, a gust of wind blew it all the way across to the Sputnik area. Further gusts moved it closed to Rift. I was kinda looking forward to it going downstream, too.

There wasn't much remarkable about the fourth Grand eruption of the day, other than it was the third Grand eruption between consecutive Beehive eruptions. I'm waiting for the day we get two Grands between a pair of Riverside eruptions.

The eruption itself was nicely lit by the moon, with a hint of moonbows when I looked specifically for them. WIth the dead calm night, the second burst was nicely spectacular.

Turns out I was wrong about the next Grand eruption. Thanks to a sub-six hour interval, Grand was able to erupt on what was probably the last Turban before the moon set. The eruption itself was 3 seconds short of 13 minutes, but was perhaps still the best possible one burst Grand eruption.

Dawn fog in the Upper Basin

Even with the short intervals, Grand is finding it hard to erupt twice at night. The next eruption window began well before sunrise, and this time featured a 36 minute Turban interval on which Grand started. It not only managed to have two bursts totaling about eleven minutes, but also Vent & Turban continued following the eruption.

With nothing much to do, I decided to check out the time of first overflow. It's been a long time since I paid much attention to it, since in never really changed, but with these short intervals, wondered if that might have some bearing. What I saw was inconclusive.

Where in the past I've assumed a 4-1/2 hour refill, today it took 3h53m. It took only two Turban eruptions for the crater to go from empty. Then it got a bit weird. West Triplet started, so I decided I'd wait until WT ended, and get a possible Rift start. Turban erupted early during that time, so not surprised that Triplet ended without a Rift. But out at Grand, while I didn't see a Turban eruption, I did see a full pool pouring out water and maybe even some waves. At about 4-1/4 hours after the previous eruption. Finally, the pool subsided and Turban erupted at 37m20s, which was even longer that the earlier delay overflow that turned into the eruption.

Only missed a Turban eruption, and was curious to see what would happen next. Grand ended up with a moderately long interval of just less than seven hours, and erupted on the seventh Turban following the heavy overflow. Interesting co-incidence there. None of the preceding Turban eruptions showed anything remotely like they were leading into an eruption, either.

So that meant were were almost certainly going to get another four-Grand day, with three of them in daylight. Or maybe not, as Grand had a delay which pushed the eruption back five Turban eruptions and gave us a nice moonlight eruption instead.

The entertainment preceding the eruption was a paper plate which had blown into the runoff channel below Turban the day before during the storm. This time a strong wind suddenly came up out of nowhere and move the plate closer to Grand. A second gust pushed it right into Grand's pool, where if floated around. Unfortunately, this all occurred after sunset, so after a bit the plate was no longer visible. It did not appear floating down the runoff to New Orleans during the eruption either, so it must out there somewhere. Will have to look for it tomorrow.

For the morning Grand, it was a short wait for another one burst eruption. For the next eruption Grand made up for the ease of seeing it the last few days.

First, there was a 27 minute Turban interval, the first true Delay I've seen this trip. The next Turban Grand did not act like it wanted to erupt, as the pool wasn't very high, but Vent overflowed. This led to a series of short Turban intervals and durations. This culminated in Grand being full and having waves 13 minutes after Turban, and then erupting at 15m44s. It didn't start cleanly, but had about 5-10 seconds of large boils which in years past could result in "false starts" or "boops". Even when the burst began, it wasn't strong and vigorous,and seemed to almost skip the start and move right on to the 9 minutes of jetting.

All of this took place as a series of storms moved to the east both north and south of us, with considerable lightning down south, but other than a short shower and some strong winds from the north, it all missed us.

This long interval also had the effect of moving Grand's next predicted eruption to a time right after moonset.

Bulger's Hole

A few days ago I took some photos of Bulger's Hole, but never got around to posting them. Since it's not erupting, and not changing, there wasn't any hurry.

The day was taken up by a trip to Shoshone Geyser Basin. Took lots of video and photos (at least for me) and will post a few photos here in a day or three, once I find some good ones.

Started out before dawn, and ended up arriving at the basin by 08:30. Finally figured out that the creek crossing needed to be done in something other than bare feet, and so had some sandals with me. Worked great, although the water was numbingly cold.

The areas around Little Giant was changed from two years ago. The crack with the pulsating formations had enlarged into a crater about 1x2 meters across, which was bursting water to about a meter whenever I was close enough to see it. Little Giant itself was dead calm , which is not how I ever remember seeing it.

Got to Minute Man just as it was starting to erupt. Wasn't sure what was going on, as Minute Man's Pool was full, and I saw three quick eruptions of Minute Man, then nothing for half an hour. The Pool also dropped below overflow during this time. Then I four more, then another gap. The third series, however, kept on going, and as it turned out, Minute Man was erupting the entire time I was in the basin.

By that time it was time to cross the creek, and while doing so, I did my usual deconstruction of the hot pot dam that the NPS seems to tolerate, or perhaps plans to use as part of excuse to close the area.

Velvet was quite active, and saw a number of eruptions as we spent several hours in the area in the hopes that Hydra might erupt for us. But no such luck there. There were some Knobby minors, and I managed to miss the Bead eruptions, although I did see the first when I was eating breakfast over by Minuteman.

Disappointed that Lion had been turned into a drain for the runoff from the "Old Lion" geyser that broke out nearby. Really liked the way Lion would eject the little horizontal spits of water.

Tried to go up to see Boiling Cauldron, and did manage to pay my respects to it and its runoff channel, but the deer flies were so thick that I didn't want to stay. They'd land all over me, half a dozen at a time whenever you moved to a new location, and you need to move around to appreciate the runoff sluiceway.

Skipped the call for a short Beehive interval, but did go out to see the fourth Grand of the day, right after sunset. Having two consecutive four-Grand days is something I can't remember experiencing before.

With an eruption of Grand only ten minutes after midnight, it looked like it could easily be a four Grand eruption day. The second eruption of the day occurred just at dawn before 07:00, so that looked to be even more likely. And it was a two burst eruption with calm wind conditions.

After taking a couple hours of napping, I decided that since there was plenty of time before Grand, I should head down to Fan & Mortar and eat lunch and maybe even try to do some computer work. Sitting in the shade on the bridge abutment was the place to be. So shortly after I arrived, just starting to dig food items out of my pack, Fan's Main Vent start splashing.

The event progressed nicely. There were a couple of pauses, and during them it was obvious that the water level in Main was high. We weren't seeing just the occasional spits, but boiling and splashing. I saw at least one burst that put water over the rock divide into East Vent.

Fan's vents quickly went into what seemed to be a lock, and then sat there. It was almost like the lock came too quickly. But eventually we got the huffing from Mortar, and then water appeared in Lower Mortar.

Fan & Mortar eruption

It was a powerful Fan dominated eruption, with several surges out of main putting water into Norris Pool. Unfortunately, the wind was fairly strong and blowing right toward the trail, so the only dry vantage point was at the north end of the walkway. The timing of the eruption also meant that tomorrow is free for a Shoshone trip.

Following the eruption, went to Grand for the third eruption of the day, which came less than an hour after noon. If the intervals so far today had just been a little shorter, we could be looking at a five Grand day, something I've never heard of before.

Later in the afternoon we got Beehive's eruption. The wait during the 20 minute indicator was a crowded on both sided of the river as I've ever seen it. I was on Geyser Hill, and it was impossible to move around the walkway. The crowding on Geyser Hill could be explained by the eruption of Old Faithful only about 15 minutes earlier, and I assume the Visitor Cathedral was responsible for directing gush rush down to the river.

The eruption itself was pretty cooperative, with only a few moments at the start of the eruption where the boardwalk on the Hill got sprayed. Then the wind shifted so that by the end of the eruption, people over Old Faithful's runoff channel were scurrying to new locations.

Clouds began to thicken, and thunder was heard in the distance as the fourth Grand eruption approached, but other than preventing the rainbows in the eruption from appearing, nothing much happened. So in a little over 16 hours, Grand had four eruptions (three of them one burst) and three of those in daylight.

Heading out to Grand I passed a small herd of louts heading up toward Castle. Interesting time of day to be out for a hike, considering it was mostly overcast, but it was warm. They passed by just after I'd settled into waiting for Rift to end.

That's also when Fan & Mortar decided to have another event. When the announcement of a second pause was made, I was at least fairly confident that I wouldn't have to go down that way, and I turned out to be right.

Like last night, Grand erupted when there was just enough light to see it.Since it was not as cold as normal, and dead calm, it was also possible to easily see the second burst. Although, this business of erupting not in daylight or darkness is going to quickly get tiresome.

So headed back in for more sleep, then played around in the cabin until ran out of things to do. By that time the Grand interval was approaching five hours, so decided to head out and kill time. So paid my respects to Splendid, took a look at Fan & Mortar just to say I'd been there, and then went over to Grand.

As I approached Sawmill, the eruption there stopped, so I watched the pool drain down, when a call that Grand was showing waves came over the radio. Surprised, I turned to see Grand boil up about 1/2 meter. A few seconds later Grand started, resulting in a 5h42m interval. As far as I can remember, if that's not the shortest interval in the last few decades, it's only a minute or two short.

But the weirdness wasn't over. It was a bit steamy, so I wasn't paying close attention to the activity when I suddenly realized that I hadn't seen Vent. I looked at the time, and we were approaching three minutes. Vent's vent was still empty. Getting better views showed no activity, not even any steaming. As the eruption progressed, kept looking for activity, and it wasn't until 8m12s before it suddenly started. Within seconds it seemed it reached full height.

And from then on, it was an ordinary short Grand eruption. Vent & Turban continued, and by twelve minutes later there wasn't any afterplay.

Next up was Beehive, but first we were treated to some exhibitionistic clown walking down the boardwalk from Castle toward Geyser Hill in dry-wall installers stilts. He even posed for his girlfriend by standing on one foot or bouncing in front of one of the slimy holes by Liberty.

The Indicator started within moment of my arrival at the benches south of Depression. The wind was fairly cooperative during the eruption until the last minute, at which point the raincoat and umbrella got used. At least it was just the edge of the spray, so I wasn't totally soaked.

The rest of the day was taken up with a fruitless wait down at Fan & Mortar for a weak early afternoon event. Since I had no idea what was going on at Grand, I got there early again. This time we got a Vent overflow delay (Type 3 ?) along with a West Triplet eruption. The long two burst eruption was followed by a long pause in Vent & Turban activity.

Leaving the area I thought that Sawmill Group looked good for some Penta activity, but didn't stick around. Turns out I was right, as Penta did erupt.

About an hour before time to head out to Grand, the call went out that there was another event starting at Fan & Mortar.Perfect timing, as I'd just gotten a nap but was way to early to head out.This way I could kill some time and maybe even see F&M. There were a few moments where they looked good, but on the whole was another one of those weak events that promised little and delivered.

Grand itself had another short interval for another one burst eruption shortly after midnight. I do expect to see my first four-Grand day in quite a while tomorrow.

As expected, at dawn the fog was thick. Geyser Hill was a mass with a couple of larger plumes of unknown origin rising from it, origins unknown. At Grand the whole north end of the basin was a solid mass as it began to lighten.

I also arrived to find Rift well into an eruption. Not surprising, and after a day of 6-1/2 hours intervals, I figured it was time for a long. So was caught a bit by surprise when Grand initiated another short, one-burst eruption just short of seven hours. The idea of going out to Grand without the expectation of at least a two to four hour wait just doesn't seem right.

So that afternoon, Grand decided to make up for that. It ignored a West Triplet eruption, which in years past would have been a good time for an eruption. It had multiple "Type 2" Turban delays, where there isn't a long Turban interval, but there are early waves on a flooding Grand pool. The second time it did that, the poll was full and pouring water at the 13 minute mark. But by 17, the attempt was obviously over, and the pool so drained that some of the ridges were dry between them.

The eruption, at least wasn't the usual short one burst, but we actually got a second burst, although it lasted for a bit over two minutes.

There were also a couple of weak Fan & Mortar events, which of course got people all excited, despite it being nearly a day short of the shortest known interval this season. I did bike as far as Castle for the evening one, on the off chance that a four day interval was about to happen.

The long Grand interval had the unfortunate side effect of pushing the next eruption into the dark. But Grand also reverted back to the pattern of yesterday's activity, so it had another 6-1/2 hour interval. It was still visible at the start, enough light to see the base surge and the start of Vent, thanks to it also being dead calm. (Dead calm also meaning that the mosquitoes were out.) I did get to see some moron dipping his feet into the runoff channel to impress his idiot friends, but otherwise there wasn't anything unusual about seeing another one burst eruption.

But what was a little pathetic was that despite the huge herd of geyser groupies in, none of them bothered to be there. This despite there having been a Beehive eruption only 30 minute before. I think the reason is that most of those people don't like Grand. They only go out there because they like socializing at Grand, and when no one else is around (but me) the opportunities for socializing are minimal.

Off-roading

Nice to see that some things don't change. Early morning was sitting in the parking lot typing up some notes whenI noticed a car on the bike trail, coming down from the Inn. I was a little late in getting to the camera app on my phone to take a better picture.

Headed out to Grand to see what had happened overnight I approached and there was no activity visible. Which meant that probably I was either arriving well after the afterplay had finished, or it really was a 9-1/2 hour interval Turns out the pool was about an hour from filling, so it was definitely a short interval. So headed in for breakfast and to wait several hours.

Headed back out for another short interval, and another one burst eruption. Went downbasin for the first time this trip, and then waited for an Oblong eruption. The thumps were noticeable only because I was trying to hear and feel them, and the eruption probably would have been more impressive from Grand as the breeze, what little there was, pushed the steam toward the walkway. Also, passing by Giant, I noticed that at a couple of gravelly places there was grass starting to grow.

The day had been semi-overcast and a bit humid, so not surprised that the sky suddenly thickened and turned gray as the afternoon Grand window approached. (It was also time to start watching for Beehive's Indicator). Went out to Grand with the expectation of getting wet, and making sure that all the rain gear was in the pack.

Turns out I needed it. The wind picked up and the droplets started about a half hour after I got there, at about the time that Beehive erupted. During the next half hour the wind was strong out of the southeast and the rain kept coming down harder. Then just as it reached a downpour in whichI was expecting hail, Grand erupted. The first burst lasted about ten minutes, and by that time the rain had let up quite a bit, and the wind had died down. So it was possible to see the water of the second burst.

It was still pretty damp when I went out for the next eruption. There was still a bit of glow in the sky, and it was pretty clear, but also quite foggy down basin. Oblong erupted, and I couldn't see much more than the tower of steam it was putting out. But after about an hour, it seemed that much of the fog had dissipated.

Grand itself was another one burst. The only interesting thing about the wait was the the prior Turban interval was well over 23 minutes long, with considerable overflow. There's a good chance there was some attempt at Vent overflowing, and it could easily be considered to have been a one Turban delay.