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Observations for 10 July (Part 1)


I got through Pinedale with about 4 minutes to spare.

Never have really cared for coming in from the South Entrance, so decided to try something different this trip. Even though it would be longer drive, come in via US 191, go over Teton Pass and then head for Ashton via state routes in Idaho. Encountered new and different things because of that.

Only active construction was on the the whole portion of US 20 in Montana, all 12 miles of it. Even though they were striping the lanes on a Saturday afternoon, were using pilot cars and letting traffic stack up (almost a mile long line westbound.) On one stretch of 191 were replacing large culverts under the highway and routing traffic on temporary diversions.

But the real fun began when I approached downtown Pinedale. Suddenly the streets were lined with people and there were old horsedrawn wagons and other paraphernalia. On a side street I noticed what  looked like a rendevouz of mountain men. Suddenly realized that there must be a parade today. The time was 10:56, and right after I got through the gauntlet, I noticed in the rear-view mirror that a police car with flashing lights was now blocking traffic. My timing could easily have been much worse.

In Victor, Idaho, was a gathering of "classic" cars. One of the traffic lanes was coned off and all sorts of cars were parked along the curb, but I didn't see signs of any impending closure. All the rest of my way through Idaho I noticed old cars (including one that probably needed a tow) in the oncoming lanes.

Shown on the map north of Victor are a series of braided streams. Because of there is still heavy runoff from the mountains nearby, there were several miles of flooded roads. Only a few inches deep, they had posted 25mph and you just rooster tailed your way through. (I found 15mph worked better.)

The drive in this morning had further entertainments. As I passed the Mallard Creek Trailhead turnout, just north of the Upper Basin, at around 06:00, I noticed that there were a couple of motorcycles there. Interesting, as not a place you normally see motorcycles that time of day. Then I noticed why. Next the the pavement was a green pop-up tent. I guess the morning patrol had not yet passed that way.

The Grand this morning seemed like an appropriate greeting. A Grand initiated one burst that lasted 12m03s. Then Vent and Turban paused for about 14 minutes, tried and failed to restart, waiting another 7 minutes before their activity began.

After that, visited Daisy to see how bad Splendid looked. Water is no longer finding its way over from Comet, so there are no runoff channels to the north. I didn't get around to the south side as there were three bison lying down from north of Daisy to near Bonita to near the south trail.  When Daisy erupted, it got the attention of the first one. That bison got up and started moving, only to stop in the middle of Daisy's runoff. There it left a rather liquid opinion and then move over to join the other two.

Fan & Mortar had a nice event around noon-time, but this early in the interval it wasn't surprising that nothing much came of it. I went down there earlier in the day, and got to see a new Stupid Bureaucrat Trick. There was an official Suburban parked well south of the Pit of Eternal Stench, in a gravel patch surrounded by trees. I guess someone out performing their official duties wanted to be in the shade, or got the genius idea that a vehicle wouldn't be as noticeable over there.

Sat and watch an interval from one major eruption of Bulger to another. The interval was about 1h40m. Didn't see any activity, but noticed a few things. It's hard to see in the photo, but off to the left, at the edge of the sinter sheet, was a patch of steaming ground. Also, it appears the dripping from within the hole is due to water from a major seeping into the sinter, as it was strongest after the end of the majors and almost gone at the start  I would guess that it also is more in the mornings than in the afternoons when the water would tend to evaporate. So, for the first time in years, will be keeping an eye on Bulger and noting eruption times.

Finally got checked in in time to head out for the evening Grand eruption. What happened out there will be in part 2.


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Webcam update


Lately the NPS and those folk operating the camera seem to be changing something about it weekly. I gave up trying to keep up for a while.

It appears to be back for now, but at a reduced size. Instead of hacking around with the display files again, made a change to the URL. If you add "?scale=2" to the end of the URL for either page (Full page or Camera only) it will double the size of the view.

I probably won't change the view on the left of this page, so just click on it to get to the camera page.

Also, for now it looks like it can take over a minute for the image to appear, so be patient.

As for the still camera view, that hasn't changed since October, and at this point I wouldn't be surprised if it never comes back.


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Old Giant Geyser Photos


Here are a few old pictures of Giant Geyser. The first is of an eruption in 1912, taken, it appears, from across the river near Beauty and Chromatic Pools. It came from a series of photos taken in and around the old Army post at Old Faithful. Needless to say, the other ones I would have liked to have went for much more than I could afford.

The second is actually a photograph, probably from the 1930s. The third is also probably from the 1930s (does the "36" indicate the year?). It appears that some sort of activity might have just finished with Mastiff and Catfish, or it was just steamy.


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Observations for 06 August


I learned today that if you are going to do something really, really stupid, it's best to do it on the last day of the trip when it'll just be an inconvenience instead of a catastrophe

The day started out with a damp wait at Grand. Some of the thickest geyser fog I've seen this trip, which occasionally got swept away by a strong breeze. Grand itself was steamy, hard to see.

After that I rode down to find that Fan & Mortar did erupt overnight as expected. Based on the amount of activity from the vents, I wouldn't be surprised that it happened right after I left Grand the night before. (Not that I wanted to be in that weather.

Following that did get to see a nice Beehive eruption from the overlook. An eruption whose significance became apparent later in the day.

The afternoon Grand took place just as a small but windy storm was clearing out. One Turban eruption later and we'd have had sunshine and much less wind. And we didn't even get the compensation of a second burst.

I used the lull before an Old Faithful eruption to go to the Lodge Cafeteria to get some food. I was just finishing up when the call that Beehive's Indicator had started. This was a bit of a surprise, as it was only 10 hours since the morning eruption. So I finished my meal, went back to the cabin to get a raincoat and umbrella, and sauntered over to Geyser Hill.

Where I got to see the first false Indicator in quite a while. 65 minutes of it. Beehive stopped splashing and trying at about the 35 minute mark. So now the question becomes, will Beehive have an eruption with the next Indicator eruption, making this an interesting and annoying exception, or does this mean that this morning I saw the last Beehive eruption of the summer?


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Observations for 05 August


Turns out that leaving Sawmill Group last night was right decision, as Penta marker was still in place when came out before dawn. Once again, water levels there were high, but I didn't stick around. About half hour later heard to load thumps of a high pool Sawmill start.

After the morning Grand eruption, headed down to Fan & Mortar for a few hours of garbage mode, although i think I arrived at the end of a minor event. At least it never looked as good during my wait as it did when I arrived.

After breakfast, there was finally a report of an event at Fan & Mortar. This was Mortar dominated, with the activity of the Fan vents never looking good, but we did get one surge from Mortar that could've grown into a full eruption.

Following that, it was about time for Grand, but Rift had also just started. When II had returned as far as Castle, I had a decision. Based on past behavior, that meant about a three hour wait, but on the other hand, I had no reason to head any further in. So decided to head over to Grand.

That proved to be the right decision, as within minutes of arrival, the pool on Grand was full with waves. Unlike so many recent eruptions, Grand initiated this one, and we got a nice two burst eruption with Rift sputter away over on the side, on a less than 7 hour interval.

Following that, the Sawmill Group was high with Sawmill quiet. Some bubbling from Penta's lower vents was enough to get me to stick around. (That I'd been prepared to stay out a few hours was a factor, too.) All the pools continued to rise, and finally we got a good, doming surge over Penta's bottom vents, but no eruption. Expected that the next good surge should be the one which started the eruption, instead looked over and saw Sawmill boiling and doming up. Time to head in.

I was starting to get ready to go out to Grand when the next call for an event at Fan & Mortar came over the radio. It was good timing, as I figured that no matter what happened, I could then go directly to Grand. As it turned out that while the surging from Lower Mortar looked promising, when Fan came back on it never really looked all that good. So it was off to Grand.

Even heading out to Fan & Mortar the sky looked ugly. At Grand I got to experience possibly the worst conditions I've ever encountered that didn't involve precipitation. While there was no rain, it was dark and there was a strong wind from the north that had to have gusts at or above 40 mph. But it only lasted about 20 minutes, and by the time Grand erupted, it was relatively calm.

That eruption started with one of the most explosive Turban starts I've seen. It suddenly and without warning threw a plume of water sideways at least 15 feet high. It was getting dark, making the steamy pool hard to see, but just based on that I figured we were about to get Grand. And I was right. The second burst was also sort of a bonus, as the first burst was nearly 11 minutes long. But thanks to the wind, which had been picking up during the first burst, it wasn't all that impressive.

The wind was picking up because another storm was moving in, but fortunately, I was back in the cabin by the time it started to get wet.

I noticed when I was riding my bike on the service road behind the Inn in order to make the previous day's posting that there was a freshly flattened tree rat on the pavement. Coming back ten minutes later, the carcass was gone. Those ravens work fast.


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Observations for 04 August


Like the night before, the possibility of an eruption of Grand just as it was getting dark turned into an after-midnight eruption. I arrived just as West Triplet started, and Rift joined right in a half hour later. Unlike the night before, this time it was mostly clear (just the usual clouds far to the north and south) and calm.

The predicted aurora never materialized. As the sky darkened, the area to the north seemed to remain bright, but as midnight approached, it too finally became dark, and then the eastern sky began to lighten slightly as the moon rose. There was a little light on the top of Grand's steam column during the eruption, but it really didn't help make anything more visible.

In the morning, we had yet another long interval at Grand. At least we were rewarded with the second three burst eruption in two days. Was a long pause between the second and third, so it didn't surprise me when Vent and Turban quit after.

With the next Fan & Mortar window approaching, I spent an hour down there, watching garbage, although there was some Upper Mortar rumbling with water visible down in the vent, and steaming from the Frying Pan. (It's amazing how large that vent has become. No way that water would have been visible even ten years ago.)

Grand was set up for a sunset eruption, but when West Triplet's eruption led into the start of Rift, I figured I'd be seeing it in the dark. So it was a pleasant surprise to have it start on the last possible Turban eruption, just as Rift was ending. The only drawback was that there wasn't a second burst, but the lighting during the eruption, along with a breeze out of the north, gave us full arc rainbows which ended in Sawmill on the right end.

Beehive's Indicator was announced just before the Grand eruption, and thanks to the long Indicators we've had lately, I was able to seen the entire Grand eruption, and leisurely walk all the way to the overlook at Crested Pool. Too bad the sun had already set by then.

Along the ways I noticed that the Sawmill Group was again full, and in Tardy Mode. It had been that way when I came out to Grand, but after about 20 minutes, Spasmodic shut off and the system drained. I probably should have stuck around, but getting some sleep seemed a higher priority.


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Observations for 03 August


The nighttime Grand eruption wait started with overcast skies and a Rift eruption. By the time Rift had quit the clouds had turned to a strong wind and some showers. But it only took a half hour for things to clear back up. When Grand did start, the moon, while dimmed by some thin clouds, was enough to illuminate a nice three burst eruption.

The Castle eruption during the wait had to be one of the more powerful it's had in a while. Or else the wind conditions really amplified the noise of the steam-phase. It was still an impressive rumble an hour after the start of the eruption.

The afternoon Grand eruption was another one of its cases of having a delay at a reasonable time, thus making sure there's another long interval.

Here's what an eruption of Old Faithful looks like when viewed from the Snowlodge. Another lost opportunity we've gotta live with for the next few decades.


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Observations for 02 August


The previous day's late evening Grand turned into the after-midnight Grand. It turned out to be quite nice.There was a bit of a breeze from the south, which was pushing the steam to the north. The moon had just risen, so even though only about half, it was illuminating the pool of Grand and its runoff nicely. I was able to see the waves build on the pool and clearly see the start of the eruption. A second burst would have been really pretty, but that didn't happen.

I also got to hear Beehive just before Grand. It was perfect timing, as al the noise of Rift and Percolator erupting had finally subsided, making it obvious that something was happening over on Geyser Hill.

The morning eruption turned into the noon-time eruption, thanks to a Vent delay just as West Triplet had it's early window eruption. Again the lighting was nice. As Grand's surges climbed, each one broke out of the shadow of the previous one's steam cloud, a nice effect. And again, we got a one burst so there wasn't a chance to see that happen again.

During that wait, saw one of the tallest Oblong Geyser eruptions I've ever seen. A massive surge was not just as high as the dead tree by Chromatic Pool, but appeared as high as the trees behind Oblong on Wylie Camp hill.

After Grand it appeared that Penta might try to erupt from a normal Tardy Mode, but for half an hour everything in the Sawmill Group just sitting there. When Oval Spring's pulsations didn't seem to change things, I decided it was time to leave. Penta didn't erupt, as shortly afterwards Spasmodic stopped overflowing and all the water levels dropped. Later that afternoon, Sawmill erupted.

This afternoon's Beehive eruption was a warning. After several weeks of Indicator durations around 20 minutes, this one was barely over 6, just enough time to get from the store parking lot to the Firehole river overlook. (This was my first daytime Beehive this trip from that vantage point.)

The evening was clear and pleasant, and I didn't need to bring out the nighttime gear. Grand took advantage of the early West Triplet eruption to erupt as soon as the next window became available. While waiting, I saw another Oblong eruption, this one not impressive at all.


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Observations for 01 August


After learning that I had made the bad choice the night before, the day settled into the fairly typical and mildly boring three Grand eruptions and one Beehive eruption. A good day to catch up on sleep and other tasks I'd been neglecting over the previous few days.

Overnight Beehive got lost, but based on the early afternoon eruption I'd guess it went during the Grand or Fan & Mortar eruptions when people were out but preoccupied.

One good thing about the day was that the Grand intervals were a little shorter. Of course that wasn't going to last.


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Observations for 31 July


In the middle of the night I thought 7 hours would be enough to get out to Grand but it wasn't. Once again I got to see Vent and Turban and an empty crater. As a bonus, I did get to see Rift start.

The next time I got up, it was overcast with a thunderstorm moving in. Eating breakfast during that time seemed a good idea, then it was time for a Grand wait.

I really wasn't expecting a third short interval and I was right. But we did get to see a different Penta eruption than the norm. Usually a Penta eruption starts after there's been heavy overflow from Spasmodic and a slow, steadily more vigorous eruption of Tardy. This eruption was about an hour after Sawmill and Spasmodic was just at the point of overflow, and dropping. Otherwise it was a normal eruption that lasted about an hour. During the eruption itself(another two burst) Sput A and Sputnik started blipping.

At that point it was time to head in, as the sky was getting black and the rains were coming. But as we approached Sawmill, it started erupting, lasted about 30 seconds and then quit. I've seen that before, during deep drains,but this must've been more of a post-Penta effect as the water levels weren't low enough for that.

That afternoon, after a quick but intense thundershower, saw a disinterested event at Fan & Mortar;. Heading out for the evening Grand eruption, it looked like I was going to get wet, but the heavy clouds passed both to the north and south. The southern one was close enough that we got a rainbow, but no droplets.

Once again Grand demonstrated its bimodal behavior, passing up early opportunities for an eruption to only wait until it reached the 10 hour mark. I did get to see another Penta steam-phase eruption during the wait, though. It was while I was coming in that I heard that another event was starting at Fan & Mortar. The idea of riding down all that way, then coming back disappointed an hour later didn't appeal to me, so I turned off the radio and headed in instead. That proved to be a mistake, as the event quickly built into an eruption that took place well before midnight.


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Observations for 30 July


Today was mostly spent recovering from yesterday.

Some of that was out at Grand, where it continued its string of long intervals. At least we got another two burst eruption out of our wait.

I was headed out to the evening Grand eruption, dressed for a wait that could be after midnight. As I approached Tilt, the call for Beehive's Indicator came over the radio, and since it was only at the 7 hour mark, I decided that would be a good place to catch the next Turban eruption and see Beehive erupt.

As it turned out a minute or so later, I saw Turban start, followed after another minute by Grand. So I slowly walked over to watch the last half of a single burst eruption. By the time I got back to Sawmill, Beehive started, so that geyser I watched as I walked back over the bridge. At least after that I could look forward to a 5 hours of sleep before the next walk.


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Shoshone Geyser Basin for 29 July


Spent the day on a trip to the Shoshone Geyser Basin. Haven't been there in ten years, so good to be back. Was with a small party of gazers, who left at various times in the morning, with various levels of experience there.

I met the other in my party, Suzanne Strasser, at the Lower Ham's store, where we got to witness the dawn eruption of Beehive at 05:08. A nice little sendoff. From there it was drive the bikes to the trailhead at Kepler Falls and bike in to Lone Star Geyser. Thanks to a rainstorm the previous night, there were still lots of puddle along the way, but only a couple which spanned the width of the trail. From a visit by some others the previous day, I knew that the odds of seeing a eruption was low, so we didn't hang around, but headed right out at 05:50.

The trail is not in the best of shape. We encountered seven downed trees, one quagmire and two missing bridges. One, which is the final bridge across the head of Shoshone Creek, disappeared years ago. Now missing is the bridge prior to that, about 100 yards apart. So on the way in, we got to take off our shoes and socks twice in quick succession and that water is cold.

It was also earlier that I've usually gone back there in the past (usually mid- to late-August, so there was a lot more greenery down next to the trail. So despite dry creek crossings, my pantlegs were still wet almost to the knee. The wildflowers were much better than I remember, and Suzanne even found strawberries along the way (About the size of a small peanut, but tasty.)


Collapse feature near Little Giant


Collapse feature near Little Giant


Collapse feature near Little Giant, morning and afternoon

We finally entered the basin shortly before 09:00, with our first stop a quick jaunt over to see Double and Little Giant. Both were sloshing about quite a bit, but what quickly caught our attention was the feature to the west of Little Giant. I do not remember what it looked like before, but today it was long, fairly narrow collapse in the sinter. And that sinter was visibly bouncing. As water came up from underneath, it pushed at the slabs in the vent, moving them only a fraction of an inch or so. In a couple of cases it appeared that the slab was still attached, as no hinge crack could be seen, while the overhang danced up and down. This is apparently new activity, not seen by any of our party before, and I sorry to say I don't expect to see it should I ever visit again.

So from that it was south along the creek to Soap Kettle and Triple Bulger. Soap Kettle still shows no signs of any discharge, although it was sloshing around in its bowl. The back blowout vent of Triple Bulger old splash to a foot or so.

Shield and Gourd were both active, while Minute Man was still about an hour or so away from its next cycle. #11 seemed inactive, as the cone, other than a trickle matching the incoming Shield runoff, was dry. A good place to have breakfast.

When I first looked at Five Crater, it was active as I've always seen it, with an eruption of sorts consisting of water slapping the the top of the perforated shelf containing the vents, causing water to squirt through. By that time the other party was arriving, so we waited for them to catch up to us, and then we joined them as they looked those features. This time Five Crater was actually erupting, with water being forced by steam through the vents.

Next was to visit the Orion Group, where nothing much was erupting. Union Geyser even has a small, foot high tree growing on the platform beside the southern vent.

A few of us waded across the creek, while others decided to risk the fallen trees a bit farther south. While they were catching up to us, I took the time to deconstruct some hot-potter engineering, scattering rocks and setting some wood downstream.

Next up we walked through the trees and approached the Western Group. First we enchanted the sluiceway from Boiling Cauldron, which seemed longer and more extensive than I remembered. It is in turned fed by the ornately lined runoff channel from Boiling Cauldron, and includes a number of small spits.

Boiling Cauldron itself seemed unchanged, just as noisy and colorful as always. Nearby is Cream Spring, where are visible the bones of a bison that went down the steep sides and into the spring.

Following that we spent most of the rest of our time in the North Group, watching and waiting for the numerous geysers there. It was also time for lunch, and to continue Shoshone lunchtime traditions.

As we entered the group, we saw an eruption of Lion Geyser. I'd earlier seen it erupt from the other side of the creek, so we had a double (or single?) eruption interval just under two hours. The interval turned out to be double, and we saw it right on time. It still sends out that little squirtgun droplet over twenty feet from the vent.


Velvet Geyser in eruption


Velvet Geyser in eruption


Velvet Geyser, in eruption

Velvet Geyser was also active. I didn't take any timing notes, but the eruptions came quite regularly every 10 to 11 minutes or so. We did see one minor eruption, which a few minutes later was followed by one of the larger eruptions we saw, one that several times pushed water out to top of the levee of gravel it has built around itself.

We had lunch in the insufficient and moving shade near Hydra Geyser. While the water levels were high, we didn't see any activity. Across the creek, Minute Man was having a series, but I didn't want to wade across the creek any more, so watched it from there.

Bead Geyser was also active, and we saw two eruptions about 2 hours apart. Nearby Knobby geyser seemed inactive, only putting out a trickle of water.

Terracette Spring is located next to Bead, and show that there is a connection between the two. An eruption of Bead drains Terracette completely, only to have it fill back up within a few minutes.

Frill Spring did not erupt for us, but it sure did try. We watched it for a good 20 minutes have splashing a good 1/2 meter high which on occasion seemed to sudden surge up to a meter, and in about any other geyser, would have signaled the push that starts the eruption. But it would die down, only to try a few minutes later.

By that then, it was time to leave. It would be a while for Bead, or the next Minute Man series, Hydra wasn't promising, and Frill would be a while also. So waded across the creek below Minute Man and headed back. We did stop at the collapse near Little Giant, where everything was quiet. In some ways the collapse was just as impressive still as moving. The temptation to touch had to be resisted, as it looked like it could just all fall apart if we'd done that, and it's better to let the geyser do that.

The bugs hadn't been bad in the basin, but as we got higher approaching the pass, they got worse. Mosquitoes buzzed everywhere, but the repellants seemed to be doing their job. I did discover that mosquitoes can drill through a couple of layers of clothes when the clothes are stretched tight. Several times I felt a tingle on my shoulder, looked over and made sure another one died.


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Observations for 28 July


Came out this morning and saw something new for the year: a 36 minute long Turban interval, which ended with a 7 minute long eruption. Unlike the other day, that was the only unusually long duration during the rest of Grand's interval. But four Turban eruptions after that we got another delay, this time when Vent overflowed. And that took three more Turban eruptions, so we ended up with what could have been a short interval being over 10 hours.

The eruption itself was quite nice, as the steaminess of the chilly morning was long gone. After the second burst, Grand did try for a third burst, with a short fill of the crater, but then it drained and almost immediately Vent and Turban quit.

One nice thing (the only good thing) about these recent long intervals is that they've not been one burst eruptions.

Funny how just as Beehive was getting out of its habit of erupting at the same times every day, Giantess erupts and it pushes right back into the same behavior. But these mid-afternoon Beehive eruptions are nice because we are guaranteed the opportunity of a predictable daylight eruption.

While walking up for the afternoon Beehive eruption, I saw my first up close Plume Geyser eruption of the trip. What caught my attention was that there really wasn't a gap between the second and third (of five) bursts. Between the others there was a distinct pause when water wasn't even visible in the vents, but between those two, Plume continued to surge up to about 1 to 2 meters before taking starting another burst. I don't know if this has been the normal behavior, or is a Giantess eruption effect

It was clouding up by the time I went out to Grand, but mostly sunny, but that didn't last. At one point I realized that the hot sun that had been beating down on me had been replaced by a steady breeze and thickening overcast. As the interval progressed, that overcast turned to rain. At least the rain stopped for the Grand eruption, by which time most folks had abandoned their stay. The eruption continued the trend of two bursts. This time Grand had to really fight for the second. By the time it began, Vent was blasting away and Turban was thrashing madly. And almost immediately, the rains began again, but fortunately, I made it back to the cabin before the heavy stuff hit.

Today, I was sitting on outside balcony at the Snowlodge while posting the previous day's observations, (gotta go where the wifi is…). Down below I noticed our dog owners sitting at one of the tables with umbrellas with their two hounds. A little later, I heard someone down there ask, "Are you with the Disney group?" A lodge manager was walking up to them. The head of the family said, "no", and the manager said, "those sandwiches are for them," and confiscated some items off their table, and walked away. Some people just seem to generate trouble wherever they go.


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Observations for 27 July


This day started out with my going from geyser to geyser at dawn. First, I got out to Grand just in time to see a two burst eruption, the first with overcast, but that cleared just before the second burst started. During that eruption, Beehive's Indicator was announced,but I failed to hear it. I did hear a second announcement after it had been erupting for 10 minutes, but assumed it had just started. So while I thought I had time to maybe even get over the Geyser Hill, Beehive ended up starting as I was riding down past the trees below Castle. I did have time to go down to the overlook, and while walking out there was rewarded with a moonbow in the eruption spray, a sight I wouldn't have seen if I had been at the overlook at the start.

Just as I had arrived back at my bike an announcement of the start of an event at Fan & Mortar was made. I knew I would hate myself if I didn't go down and it did erupt, so north on the bike I went. It was a typical event, and when Fan's vents came back on, it quickly became apparent that the water levels weren't high enough. So back in for a nap I went.

There was a second event a few hours later, but it pretty much followed the same path as the earlier event. The only good thing that could be said about these two events is that they were far enough from the Grand eruptions that I didn't have to worry about interference. The midday Grand was a long interval, but did result in a nice two burst eruption.

The final event of the day started with a call of some sort of pause. The reporter wasn't quite sure if Gold had splashed, but in any event, the River vent was off and Main vent was splashing. Mortar's Bottom vent only splashed a bit during that pause, and then the vents reactivated. (Another opinion is that this was just a short, very poor cycle.) Only to have all the vents shut down again, and this time Bottom began an eruption to accompany vigorous Main vent activity.

This continued for quite a while, and when Fan's vents finally reactivated, they didn't take any time getting started, but almost immediately started erupting vigorously and continuously. This activity slowly, almost excruciatingly, built to the point where Fan's High vent was going to 15 feet, with the Gold vent not much smaller. The Angle vent seemed to be alternating between water and steam. Finally, we started to see steaming from Mortar's Frying Pan and the little vent on the back of Lower Mortar's "back armrest." The conditions were ideal, as most of the breeze was away from us, and the sun still high enough to provide perfect backlighting.

When the eruption finally began, it was one of the tallest and most powerful that I can remember. Most eruptions are dominated by one or the other geyser, but in this case both were huge. I wouldn't be surprised if someone had measured Upper Mortar's column at 70 feet. Fan's first surges went a good 10 yards beyond the walkway toward the Pit of Eternal Stench. The activity of the Mortar vents seemed to last a lot longer than it had in the previous eruption, and this time I remember actually seeing Fan's East vent during much of the first active phase.

The breeze did push some of the eruption into the walkway, and with the low sun, it was easy to get a huge, full circle rainbow. Outside the drizzle zone, a 240° double rainbow was obvious when standing north of Spiteful Geyser. Some of the activity of Fan in the subsequent phases was impressive too.

After than, it was time for another Grand eruption, and once again it was a long wait. There was overcast (some of it might have been smoke from Idaho fires), but it broke enough to illuminate the post-midnight two burst Grand eruption.