Category: Activity Report

Yesterday afternoon was another Rift delayed Grand interval in cold and wind. At least the last snow shower was a few hours earlier while waiting for Giant.

Note how yesterday's Giant hot period's alternated durations between long and medium.

Overnight was clear and calm and cold. The moon set just as the east was starting to show some light, so it never got totally dark. The Grand eruption was with the moon only a few degrees above the horizon, and a moonbow/fogbow in the steam over the main runoff channel. Like yesterday, the eruption appears to have been delayed by Rift, or perhaps more accurately, West Triplet. And I've never heard of a Rift interval of less than 10 hours before.

This morning there was only a single hot period, at 05:56, lasting 4m46s, as it appears that Grotto is having another marathon (starting around 02:57). As of the mid-day Grand eruption, it's still erupting.

Other Geyser Times

29 May 2007

• Penta 19:07ie, steam phase
• Grotto Ftn 19:02
• Giant hot periods
  • 11:18 d=8m25s
  • 14:39 d=3m36s
  • 16:36 d=6m06s
  • 17:59 d=3m15s
  • 19:13 d=6m45s
  • 21:02 d=2m20s
• Rift 16:21 d=43m05s

30 May 2007

• Grotto 02:57
• Giant hot period
  • 05:56 d=4m46s
• Rift 01:59 d=38m39s
• Uncertain 08:49

And nothing to do with geysers

Yesterday afternoon when I left my cabin to head out into the basin, I heard a noise to the left. Down the slope, about 20ft away, was a bison grazing away on the hillside.

While waiting at Grand, I thought I saw motion on the top of the hill. It turned out to be a coyote who ducked back into the trees.

For the wait for yesterday (28 May) evening's eruption of Grand, the sky was dark and overcast to the west, while clear to the east. The wind was still as blustery and annoying as earlier in the day. As I waited, the gray got darker, and eventually, it started to snow wet, fat flakes. But at the same time, it began to lighten to the west, so that the disk of the sun could be made out. The shower was colored pink by this low lighting. By the time the shower ended, the sun would have been visible if it hadn't just set. That's when Grand erupted. It would have been a very pretty eruption if it hadn't been so steamy and windy.

The overnight Grand was in completely different circumstances. There was still some clouds obscuring a setting moon, but it was dead calm. The boardwalks were still covered with ice from the previous evening's snow. The eruption itself was unremarkable except for the fact that Percolator was dead and there were two bursts.

On to Giant afterwards, where it was obvious from the platform that there hadn't been a hot period in a few hours. Also, it appeared that Grotto was once again going into a marathon eruption. The platform also reflected this, as Bijou was chaotic in its behavior, and all the features seemed weak.

I placed my thermometer outside the cabin when I came back in at 06:15, and just a few minutes later, it read 29°F. Which means it was much colder out in the basin itself.

Of course, the problem with making plans based on what you think the geysers are going to do is that the geysers might have other plans. When I got out for the late morning Grand eruption, it was obvious that Grotto had quit. So no marathon, and it appears I'm going to have to drop some of the errands I'd planned for today.

So just as I'm about to post the above, the call goes out that "there's water rising in Mastiff". So at 11:18 we get an 8m25s hot period, and I get to add some exercise I hadn't intended.

Other Geyser Times

28 May 2007

• Grotto Fountain 18:57 w/o Grotto
• Rift 21:07ns

29 May 2007

• Penta 06:31ie, steam phase

Went up to Daisy and Splendid again on Sunday afternoon, early enough that I could watch the activity prior to Daisy's eruption. I was there for half an hour, and during that time, saw exactly one boil from Splendid's main vent, about a half meter high and lasting only a few seconds. Disappointing.

Later Sunday evening, Grand finally made up for all the nice short intervals it's had by tossing in a long interval, which these days is a measly 8h13m. (Ahh, for the good ol' days when a "long" was over 16 hours, and a short just 10.) I never really had a delay overflow, just alternated good looking overflows with ones that were obviously not going to result in an eruption. At the same time, the weather deterorated. It got cloudy and gray, and eventually we started getting sprinkles. FInally, at 20:03, it had what was a "Classic Two Turban Delay" — heavy overflow with waves, a drop as Turban starts and a short eruption of Turban (2m59s). That was followed by a short Turban interval (17m08s)and finally on the second Turban, the eruption. The eruption itself presented a nice contrast between the white watercolumn from Grand with the gray clouds as a backdrop.

This Monay morning was mixed. The weather was clear and could have been warm if the wind wasn't gusting up to about 40mph, or so it seemed. Grotto's marathon ended somewhere around 03:00-04:00 (best guess), and Grand went at 03:10, according to the monitor. So instead of spreading things about, Grand decided that it was time to experience a Rift delay. This resulted in everything interesting happening in a little over a half-hour span. First, this time someone saw the Indicator in eruption, which resulted in a stampede to the south. They returned in time for Grand to finally erupt. While it was a two burst eruption, it took Grand a full minute after the start of Turban to begin, and the total duration was only 9m29s, yet Vent and Turban quit afterwards

Within ten minutes of the end of Grand's eruption, Giant had its post-marathon hot period. The hot period was fairly strong, with Mastiff boiling mostly to one or two feet, with a max around four,but for almost the entire duration.It lasted 9m52s, then was followed by about 3m30s of a Feather restart but with weak Giant surging.

Other Geyser Times

28 May

• Rift 10:09, d≈50m

And nothing to do with geysers

On my way to Grand last night, I saw a duck floating on the Firehole River, then shooting the rapids below the Sawmill bridge and drifting off downstream.

One of the reasons I like the early morning is because its a time unlike the rest of the day. Unlike early evening, road and people noise is non-existent. (People who like noisy machinery never seen to be early risers for some reason...) Also, it's the one time of day when the wind is truly calm. Usually on nice days, as the air rapidly warms, the winds start around 09:00 or so.

I like seeing the steam from an eruption of Grotto climbing hundreds of feet into the air, like something important is erupting. But even large pools can have their subtleties. This morning, for example, as Grand was having the heavy overflow before its eruption, there was absolutely no wind. It was so calm that the convection from Grand's pool's steam column was actually creating its own micro-wind, drawing in the steam coming from the runoff channels. These plumes weren't vertical, but all tilted toward Grand. Then a ever so slight breeze came up, and destroyed the effect.

Grand itself had four eruptions yesterday, and five in about a 28 hour period. For a day now, I've arrived at Grand and it will erupt on one of the next two Turban eruptions. I think several of these have been delay-type starts, but can't be sure because it's usually too dark (or steamy) to see clearly, and haven't seen a full Turban interval on those that I suspect.

Yesterday, coming out of a Grotto marathon, it took Giant about 13 hours to finally have a hot period for the crowd who spent a day there. At 19:58, it lasted 5m28s. There was another, weaker one at 21:50. By this morning, Grotto was back into what appears to be another marathon, with Giant's platform dead around 06:00. When this marathon ends, that's when the fun will begin.

Because of the marathon, it also appears to be no reason be hanging around down there, as I'm hearing more Geyser Hill radio reports than yesterday.

Saw an eruption of Daisy up close, started as I arrived, so I didn't see the preliminaries. But the sputs between Splendid and Comet looked little changed from what I remember seeing in years past. But Splendid was dead. It did nothing during Daisy's eruption, other than draining. Even after the eruption ended, nothing happened. There's only a narrow, barely wet algae filled runoff channel off to the north, and it appears that even that is due to Daisy's runoff.

Other Geyser Times

• Uncertain 05:40
• Grotto 05:30ie (marathon, still ie @14:00)

And nothing to do with geysers

From the NPS radios, a Sunday morning report of "two people skateboarding down from Craig Pass."

Why do new hiking boots always come with laces that refuse to hold a knot?

Somebody locked their doglet inside the car at the Lower Ham's. You could still hear the ankle-biter yelping down at Crested Pool.

At 10:30, as I'm headed down-basin, there's a bison in the Lodge cabin area blocking my way.

One of the things I like about a Grand start on a delayed Turban interval is the explosive start. For the last 10 minutes or so all there is to see is a full, heavily overflowing pool that fluctuates slightly. Then suddenly, with only a couple of large pulsations, Grand suddenly rockets up to 10 meters high. It's as if Grand has been fighting for all that time to erupt, and had finally figured out how to unleash itself, and is going to make sure it keeps erupting.

Unfortunately, it doesn't seem to guarantee against a one burst eruption.

(Years ago Grand would have "boops", where it would have several boils to 3 or 4 meters, as if the eruption was starting, only to suddenly subside. It was amusing to see people who knew enough to be dangerous suddenly taken aback when the pools dropped instead of erupted.)

For the last few days, in what had to have been not the greatest of conditions, we kept getting eruption times on every feature on Geyser Hill (especially Plume) from dawn until dusk. Or so it seemed. So today, it what started out as a beautiful day, a day in which we've yet to have any precipitation from the thunderclouds, and on a day when there's a large influx of observers for the Memorial Day weekend, Beehive erupts in the middle of the afternoon. No one saw the Indicator, the only radio call was at least two minutes into the eruption. Webcam observers probably got a better start time.

And I saw my first mosquito today, a sure sign that Spring really has started.

Other geysers:

• Rift 11:03
• Fountain 12:23
• Great Fountain 13:50

As yesterday afternoon progressed, the temperature rose,the sky cleared and the wind died down (or at least wasn't as obnoxious) so that by the evening One-Burst Grand, the weather cold almost qualify as nice. Otherwise a dull, uneventful afternoon, and one to use to settle into a routine.

Today has been nice. Still cool, and with the midday breeze, but clear and in the sunshine, a jacket isn't really needed. Grand had, if the electronic monitor is to be believed, a little over 6 hour interval this morning. Castle must've had a minor overnight, too.

In any case, it was a nice day to stick around and watch a full West Triplet (and Rift start at 11:03). I see from the weather forecast that it'll turn wet again just as it's time to start spending time at Giant.

In other notes, when zips by you on a bike and says that dogs aren't permitted in thermal areas, don't whine back, "well, I didn't see a sign". You are just admitting that you know that you aren't supposed to dragging your little darling out there, but also didn't think anyone would care. Just don't say anything would be better thing to do.

Tilt does erupt! On my way out to Grand last evening, once again while tying up my bike, I saw a geyser erupt. This time, at least, it wasn't Grand.

The activity I saw lasted about a minute from when I first noticed it. It was throwing jets of water away from the boardwalk about one meter high from the northern opening in the vent. Nothing impressive, but nice to know it's not dead. (I should probably write up a few Tilt related memories for posting later this summer.

Otherwise another long one burst Grand (d=11m31s). At least it went early, so I didn't have to wait in the cold, windy and dark. Just the cold and windy.

Today Grand decided to have a longer interval for no apparent reason, and Rift had a duration which for me seemed a more normal length. Midway through that eruption, West Triplet decided to throw in one of its empty vent steam minors.

Sawmill Group had a deep drain with a couple of Sawmill restarts, followed by an eruption of Uncertain.

Other Geysers:

• Rift 10:47 d=1h19m
• Uncertain 10:57

After the excitement of the morning, time to catch up on a variety of things that have been put off due to a combination of Giant, weather and lack of transport. All that done, it was time to head back out to Grand. The weather had changed back to windy, cool, and overcast with occasional snow showers.

In just the few days I've been here, I've seen a couple of Rifts that in my previous visits would be worthy of note, because of the shortness of their durations.

On 21 May, one lasted ≈34m. Today the eruption at 13:01 lasted only 28m21s. It was the second of the day, the first being early in the morning around 01:15. And neither eruption seems to have had any detrimental effect on Rift.

Meanwhile Grand continues to annoy. At least the afternoon's one burst eruption lasted 11m20s, and was followed by a Vent & Turban pause of 19m14s.

Graham Meech stayed out all night as Giant continued to have hourly hot periods during the night, none of them as strong as the one that occurred the previous night while I was making these postings.

The hot period at 05:22 had little Mastiff surging, and initially seemed to last 7m20s. Until Feather restarted and Giant almost immediately began strong vertical surging. Within three minutes, Giant began to erupt, at 05:32. (I was in my Lodge cabin getting ready to come out when Graham's call went out. When I heard him announce the restart, I knew I wouldn't be seeing this eruption start from up close. I was in front of the Lodge instead.)

The lighting was good, for at least my human eyes, and the wind direction such that the spray and steam was carried northward, making Giant's water column easily visible from a distance. It was too early for good backlighting.

As Giant died down, I rode my bike down to see Grand. Once again, it started as I was locking my bike at Castle. It was a 8m43s long single burst eruption. The only other thing of interest were the bison cow and calf who were, according to a visitor, standing in the runoff channel at the start, and finally realized that that was not a good place to be standing and took off running.

Other geysers of interest:

• Oblong 05:27 ie
• Daisy 05:07
• Riverside 01:44, 08:23ie
• Grotto 03:53

This will be pretty short, since I spent the day between Giant and Grand. At least the latter was fairly cooperative. The weather was cool (cold when breezy) but no rain or snow.

Giant hot periiods:

• 06:28 d=4m40s
• 07:27 d=1m40s
• 08:57 d=4m00s
• 09:57 d=2m10s
• 12:01 d=1m39s
• 13:00 bathtub
• 14:16 d=6m37s
• 16:28 d=1m30s
• 17:37 d≈3m20s
• 18:35 d=2m10s
• 19:35 d=1m42s
• 20:39 d≈5m

Other geysers:

• Grotto Ftn 09:07, 13:49
• Grotto 09:12, 13:54
• Penta 13:17ie
• Grand 09:18 T2C, 17:21 T3Q
• Oblong 04:31, 07:33, 12:46, 15:55ns
• Riverside 05:46, 12:28, 19:06
• Daisy 06:04, 09:39, 12:53, 15:57, 18:51

In the Grand Group it was a cold, miserable day. By afternoon,m temperature was just above freezing, so the windswept snow melted where it landed. When I arrived, Rift had just started, and we were in a delay overflow. With a short Rift duration, I was hoping for a short delay. No such luck. The second Turban was a short but strong eruption, followed by a 16m11s interval. So no surprise the total delay was D9.

Following a short Grotto marathon overnight, there was a Giant hot period at 14:33, d≈5m. A second hot period occurred 16 17:14, slighly longer d≈6m, and then at 19:29, d=5m50s. Grotto still had not restarted as of the last hot period (at least I never heard a report of that.).

• West Triplet 12:25
• Rift 12:57 d≈34m
• Grand 16:07 T1C
• Daisy 12:31, 15:50
• Oblong 14:40, 18:54
• Riverside 16:17
• Castle 18:51

Having been gone a long time, some of the things I'm noticing are probably well known and obvious to those who' ve been here more recently. But I'm still going to comment on them.

Tilt Geyser is completely different. The original Tilt, which had functioned as a noisy steamvent in the 1980s and 1990s, has been completely filled in by algae and debris carried along by Crested's runoff channel. In the several minutes that I stood there, I noticed that the blowout vents were fluctuating between overflow and down about 1.5cm. The changes in level was also accompanied by ripples and palpitations. That, I assume, is the sum total of Tilt's present activity, which I guess would still qualify it as an intermittent spring.

The Sawmill Group appeared almost as I remembered it, with one minor and one major exception. Tardy has developed a new runoff channel which heads northeast and under the boardwalk, which would have been useful when I wanted to put electronic monitors around the group.

The big exception was the new hole (or holes) that have developed beside or even under the bend of the boardwalk at Scalloped Spring. Thanks to the snow showers, it was easy to see the long stretch of warm walkway. The between the walkway and the old collapse feature actually had water sloshing around about a half meter down. I'm surprised the NPS hasn't panicked and closed the trail. If the do, let them wait until July.