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Observations for 2019 May 30


The weather was finally nice all day. Went out to see the One BurstGrand for the morning eruption, and had to wait for an interval of over six hours. But by then had learned about the early morning Morning eruptions, so that was our next destination.

Arrived around 11:35 and ended up spending about ten hours sitting at the overlook. By sunset, Morning was nice and high, but we also started getting Morning's Thief boiling. Not a good sign.

Then we got a series of huge Thief eruptions about 12 minutes apart. This continued for about 45 minutes until Fountain finally started. Even then the Thief wasn't finished, as there were three more eruptions over the next seven minutes.


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Observations for 2019 May 29


It was head out first thing in the morning for Fountain Paint Pots. It was also clear overnight, so I had to scrape the frost off the windows of the truck, and then drive in the fog to get there. Fortunately, that mostly cleared out north of Biscuit Basin, and there were no bison on the road.

But there were bison in the parking lot. We were the third behicle there, and I didn't see them until I had packed up and was about to head out. Suzanne never saw them. They were right in front of the vehicles, maybe ten feet from the walkway. Just settled down there, comping away, and they ignored me.

The interval for Fountain wasn't unreasonably long, and we got a couple of Morning's Thief eruptions before it started. It lasted about 35 minutes, so we knew we were not going to be coming out for the next one.

So a few hours later we arrived at Grand with West Triplet and Percolator erupting. Which led to a Rift eruption. Which didn't really seem to matter. Although Grand did have a delay, and several large boops as much as 1/2 minute before the One Burst Grand eruption finally started.

After, I went down basin for really the first time this trip to see a Grotto and Grotto Fountain start. I got both, but was a bit disappointed that Grotto Fountain got to about three meters at most, and Grotto started within a couple of minutes.

From there I noticed that Link was having a minor eruptions, so I stopped by to watch it. It wasn't long before I felt and heard a thump. That was interesting, because I've never had that happen before during a minor, only during those major eruptions I saw in 1983. Then it happened again. For the third time I finally figured out what was happening. It was from the people slaming the door of the Riverside Pit Stop.

And here's what the new view of an eruption of Riverside. It belongs on a calendar sold by "Yellowstone Forever".

Arrived for the afternoon Grand just in time to see Turban have an eruption lasting 7m30s. This was undoubtely caused by a delay. It was three Turban eruptions later when the One Burst Grand eruption finally occurred. The only different thing about this eruption was that the restart was quick, about 8-1/2 minutes.

Later went over to Black Sand Pool for some more thumps, this time from a real geyser. There were some good, strong ones, and they didn't ever seem to correlate with the heavy boils the pool was having.

Went out for one more Grand eruption after it got dark. This too was one burst, with nothing to distinguish it.


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Observations for 2019 May 28


After last night's long duration Fountain eruption, it had an even longer eruption before dawn-- about 39 minutes long. That meant that we would be going out to the Lower Basin around noon today, to see what would happen.

First we went out to Grand, where we got a pretty non-descript one burst eruption. The it was out to the Fountain Paint Pots.

Waited about an hour, with nothing much happening, and definitely nothing out of the ordinary. But when Fountain finally started, the boiling in Morning increased almost immediately, It took a little over a minute for that to go from heavy boiling to surging to erupting. This was my first Morning eruption in several years, and the conditions were excellent. There were frequent breaks in the clouds, allowing the sun through. The wind was such that the steam from Morning went behind (as seen from the overlook) Fountain, which in turn was easily visible.

The eruption looked as I remembered them-- the pool lifting up several times a minute with plenty of noise in each explosion. Several times there were vertical shots well over 40 meters. At around 14 minutes, the surging died down, and the total eruption duration was 14m38.

Fountain continued to erupt, but we didn't stick around as there were enough of the more dedicated people there who like seeing it.

After a meal back at the cabin, it was again out to Grand. This time we got a Vent overflow delay. Two Turban intervals later West Triplet started, then shortly after Turban preceeded Grand by about a second. It was partly sunny, but the wind was aimed right at the boardwalks. From my usual spot to beyond West Triplet , the umbrella was needed. But when Grand ended, the wind cooperated, pushing the steam away so that we could see Grand's crater, and that it still had water in it. It took overa minute, the crater filled and we finally got our second burst. The water column was completely visible, despite the earlier wind directions.

Again, we then headed to the Lower Basin. In years past, there were cases of a second Morning eruption about five or six hours after a dual eruption, and we wanted to be there for that.

That time period came and went, and we ended up at sunset waiting for Fountain. After a couple of Morning's Thief eruptions, it was near dark and we left the area. There were a considerable number of people there, and we figured there were more than enough get the Fountain info.


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Observations for 2019 May 27


I think I now have a better understanding of how the Elusive Vachuda felt back in August 1982.

Got back even earlier than the previous days. Not much had changed overnight. We were getting a nice strong surge every hour or so, otherwise it was just lots of strong South Vent, with some North Vent that wasn't being affected by South as much.

The weather was fine up until around noon, when it started to deteriorate. There was a rain shower around 13:00, and then about an hour later it started coming down hard and continuous. The surges kept coming at about the same rate, so we stuck things out as long as we could, but by 16:00 we gave up. There was a social gathering over in the government area, and by then it seemed a reasonable alternative to four more hours of rain. We were pretty well bundled up and warm and dry, but knew that as soon as we started to leave and pack up, everything was going to get soaked. And it did.

So an hour and a half later, at 17:32, an obvious roar coming from the east was noticed. There was never a radio call about any increased activity, or even the start of the eruption, despite people with radios seeing the start. Rushed on over to the area to see what we could, but it was steam by the time I parked in the lot. Another short water phase.

The wind direction was the same as last time, with the platforms, especially the lower one, getting soaked. The walk down to the bridge was in a downpour, but at the bridge itself it was just the slowing decreasing rain. Cistern was flooded and brown from all the debris washing in.

Unfortunately, no one at that gathering in the government area saw "an eruption of Steamboat". Yes, we all saw a powerful steamphase right after the transisition. But what we saw was also to the equivalent to seeing 99% partial solar eclipse. It's close, but it's not seeing totality itself. What happens is impressive and unusual, but it is nothing compared to what we could have seen. In that regard, I felt cheated by what I saw. I waited three days, in far less than ideal conditions, to pretty much see what I'd seen way back in the 1990s.

After we got back to the Old Faithful area, discovered that Fountain had been observed during the day, and we were approaching the eight hour mark. So we took a quick trip back out, and caught an eruption soon enough after the start that we got to see an eruption of Morning's Thief. The lenght was fairly long, but not long enought to make us want to go out for the next eruption.


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Observations for 2019 May 26


Today was more of the same. Arrived at the same time as yesterday, but this time we weren't the first in the area. New Crater/Steamboat was a little improved from yesterday, but not by much. North Vent was holding its own against the stronger South, but most of the time wasn't very thick or tall. Every hour or so there's be an attempt at a surge, with a little bit of vertical in North Vent, but it rarely followed through.

During the afternoon there was some sun, and it got warm enough that I actually thought about shedding a layer. But then the sun would disappear behind a cloud, and I got to feel the real air temperature, which wasn't great. Around 18:30 the thunderstorms came in. The first wave was cloud-to-cloud, but not the second. We had a number of nearby strikes. One was of the flash-boom variety, and some were claiming they saw the strike over in the farther Back Basin. Then again, after the storm, some claimed to smell smoke, and the wind was coming from the parking lot then.

Finally gave up around 20:30 and headed back to old Faithful.


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Observations for 2019 May 25


Since the other choice was some One Burst Grand eruptions and maybe a short Beehive interval, instead decided that watching nothing happen at Norris was a valid alternative.

Arrived at the platform around 06:45 to a lot of strong South Vent minors and weak to no activity from the North Vent. That was pretty much the case the whole day. There were a few good surges where North did join in, and South put out a heavy stream of water, but they were isolated and infrequent. Around 18:00, the situation did change a little bit, in that North was now initiating some of the activity, and not stopping when South began. There were even a couple of surges where the North Vent showed signs of going vertical. But no eruption by the time we left at 19:45.

What was noteworthy was the lineup to get out of the park. We came to a halt well before Terrace Spring, and over the next 20 minutes slowly crept toward the junction. No one was making the turn, because it was brake lights all the way toward the campground entrance. I sure hope there was an animal jam just down the road, as the idea of being that sort of mess for the next 14 miles makes me glad I never have to go to West Yellowstone.

What was also interesting was that the lineup was devoid of busses and campers and RVs. On the drive from the junction to Old Faithful I counted only 5 of them. It was almost all small passenger vehicles. I guess it was everyone headed back to their hotel lodgings.


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Observations for 2019 May 24


No one knew when the dawn Grand eruption happened, so extrapolated from the previous evening's time. Also, someone reported an empty crater, which at least gave a maximum time. Turns out I guessed about right, as when the electronic times finally appeared, it was only about ten minutes from my estimate.

The weather looked wet when we left to go out, but while cold and a bit windy, was never actually raining. Took a quick look at Economic and vicinity, where I noticed that Wave was down a bit, and Economic is actually hot not just around the vent, but has a well defined runoff area in the middle of the orange to the south.

Was one of those Turban starts where Grand waits well over a minute to join in. The burst ended at around 8-1/2 minutes, which should mean another burst, but I have seen a One Burst Grand that short. But the pause was quick, and we got our second. Just that while the total duration was less than ten minutes, Grand made no attempt to even try for a third.

Considered going out to see activity in the Lower Basin again, but timing (Great Fountain erupted as we were eating the meal of the day) and weather (heavy rain) pursuaded us to stay behind. We also missed Beehive, seeing it from our cabin after we heard the roar of the eruption.

Got to see Grand start from behind Castle, because we weren't out there in time for the 5h32m interval. But there was a nice second burst. The rains had also died down, and the breeze was blowing to the east for once, so it was again easy to see the water column.


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Observations for 2019 May 23


The day started out sunny, windy and cold. Spent some time on Geyser Hill since it was approaching 24 hours since the previous Beehive eruption, but it wasn't going to cooperate.

After that, went out for another wet eruption of Grand. One where there wasn't much to see after the start again, because of the wind direction. The wind and rain starting didn't help, either.

The the eruption of Morning the day before, and a report of Fountain in eruption in the morning, it seemed like a good idea to go out there and see what would happen next. Turns out, not much.

Didn't know it at the time, but got there only 3-1/2 hours after a second Fountain eruption. That Clepsydra was shutting down should have been a good clue that we'd missed an eruption, but the whole area was wet because of the rain and snow, and nothing was steaming. It was also confusing as the water level in both Fountain and Morning were high. Water was visible in Fountain from the overlook.

During the next couple hours, Clepsydra kept shutting down, and the geysers kept rising. But the weather turned acceptible, if a bit windy. Eventually, by 15:30, Fountain had water visible well into the neck. That's when things stalled out. Jet was acting like it was erupting, but there was only noise, no water. Clepsydra came on and stayed on. A few hours later, approaching what we thought was well over ten hours, the water level in Fountain began to drop. There was increased boiling in Morning's Thief, which is supposed to be a sure sign of Fountain erupting eventually. By the time we left, around 19:30, Fountain was almost out of sight, and back to about where it was when we arrived.

So we got to see what happens between Fountain eruptions, without actually seeing any Fountain eruptions.


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Observations for 2019 May 22


It took the webcam noticing Beehive's Indicator to roust us out of our nice warm cabin and go out into the cold air. Arrived at Beehive just in time to see the Bubblers erupting just before Beehive's explosive start. The bubblers came back 2m50s into Beehive's eruption, and lasted about 50 seconds, reaching a height of about 1/2 meter during much of that time.

Later it was finally out to Grand to see it erupt. Got out in time for a long, over six minute duration Turban eruption, which was followed by a just barely Delay. Of course that resulted in a long One Burst Grand eruption, white steam on a gray background with the wind casuing the spray to land around West Triplet and Rift.

A quick check down basin showed nothing much of interest, other than Solstice was again, or still, in eruption.

Later went out for the evening Grand. The cold and wind wasn't too unpleasant, but the wind shifted just before the Grand eruption, and kept shifting during the eruption, so that all the walkway got wet at some point, and the steam made it difficult to actually see the eruption.

The first burst lasted a bit over 9-1/2 minutes, so the expectation was for a one burst with Vent and Turban continuing. But about a minute later, those two became quite vigorous, and then the steam parted enough to see the start of a second burst. That burst lasted 2m15s, so what was a short eruption became a long one.

I see that "vista enhancement" is possible in some areas of the partk. Over a dozen large trees that were blocking the view of the Inn from Old Faithful have been replaced by fresh stumps.


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Observations for 2019 May 21


It was a day to finally get out into the Upper Basin and see what was different from last October. It was also gray and breezy and not warm.

The bike rack placement is interesting. There's one as you approach Castle, down in the primary spray zone from the geyser and in prime selfie territory. It's also butted up against the curbing, so that one side is useless. It's about as far from the boardwalk as possible and still be "at Castle." There's a small one across from the southern Daisy trail. I guess it's purpose is to encourage people to not ride directly up to the benches at Daisy. There's a small one at Grotto, which will be inadequate should Giant reactivate. The final bikerack was dumped next to Backwater Spring, on the trail to the now closed Pit Of Eternal Stench.

The replacement Pit is interesting too. Gonna appear in more than a few Riverside eruption photos and videos, I would guess. (Which is somehow appropriate for Riverside.) Next to it is a big spoil pile of sinter dug out to make room for the vault below. That tends to offend me, as there is no reason for the NPS to be digging in thermal areas. Especially when that digging is done with active, flowing springs uphill from the hole. The overflow from Victory hasn't reached that far yet, but you can see the swath of dead trees from its previous activity pointed right at this new building.

Grotto was having a marathon eruption, but down by Oblong we saw Solstice in eruption. It's a feature I've never seen before, so I could be wrong, It's east of Oblong on the other side of the river, and the eruption looked a lot like Old Tardy or Terra Cotta A (the big one).

With nothing much else going on, and Fountain having long durations, we went out there for the early afternoon eruption. The weather forecast said that there could be showers in the early afternoon, and that's what we got. We waited an hour or so, and the rain finally came just when Morning's Thief had its first eruption. Previously I've seen that feature erupt to maybe 3 or 4 meters, but this was between 10 and 15, and quite impressive. There was a second one, just as large, before Fountain finally started.

We got one more Thief eruption, and that seemed even more massive and taller than the previous activity. Then it was wating out the Fountain eruption to get the duration. The wind and rain both picked up during this time, and unfortunately that was coming in the same direction as the view we needed. Fountain's steam made it impossible to see the eruption, and the boardwalk.

What got our attention, and the reason we were there was that Fountain durations were well over the magic 38m mark that said Morning might do something. This eruption lasted about 39m12, which made it shorter than the previous know durations for the week. With the weather the way it was, it was a relief to go back to a dry vehicle and head in.

One thing I noticed today, something which may have been there for years. It's that under the first 45mph sign as you head out of the Old Faithful area has a smaller sign posted below it. In tiny print, it says "Slower Traffic Use Turnouts". Over the next few weeks, will report any other, similar sightings.


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Observations for 2019 May 20


It was back to Norris. We left Old Faithful with it snowing, and it continued all through the drive. We arrived on the platform at 07:15, where the wait began.

For the next eight hours, it was pretty quiet. There were occasions where the strength of a surge was worthy of noting. There were a couple at 08:03 and 09:35, but no followups. That was it until couple more at 13:42 and 14:21. Again, it briefly looked good to a number of us, but nothing else happened.

The conditions were for the wait were poor. The snow continued off and on for the first few hours. Finally the clouds broke and there was even some warmth from the sun which dried things out. But sleet started around 13:00, and that turned into rain, which persisted for about an hour. The little wind we had was blowing toward the platforms, which made observations difficult, especially for the south vent.

So by 15:13, it was pretty damp, and cloudy, but no precipitation. There were a couple of quick surges that got my atttention, so much so that after a third one, I dug out the camera to start recording.

I got two minutes leading up to the start of the eruption. The surges were coming several a minute by then, and there were two huge ones in the seconds before the start. As the water climbed, rocks could be seen falling next to the column. The column itself was lost against the gray sky backdrop. But the upper platform was pelted by what seemed at first to be hail. It turned out it was gravel ejected by the eruption.

Because of the wind direction, none of the water fell upslope from the north vent. That's probably why the water columns never turned brown, and also probably why the water phase lasted at most three minutes. I noticed the vents in loud, strong steam at the 3m45s mark, although the north vent would could occasionally be seen throwing water later on.

Also because of the wind direction, there are new runoff channels being developed all down the slope between the main runoff and Cistern. I got down to the bridge before any footprints appeared in the mud washed over the walkway, and there was rocks all over the bridge, and some fairly big ones (cherry tomato sized) too.

The wind kept shifting, but the rain was localized, so at times one or the other platform, or part of the walkway, was being drenched, while the rest of the area was not. At one point, as I was moving stuff back to the parking lot, I even got rained on near Emerald. Even so, everything got drenched, and the blankets we were using to keep warm can hold a lot of water in them. The parking lot, however, never seems to have been a target, so this eruption was a lot like the first one seen last May.

Later that evening, Suzanne noted that Grand had been having a long series of sub-five hour intervals, and we were approaching the five hour mark. So we went out at sunset to see a couple of Turban intervals. The second one didn't officially qualify as a Delay, but was close enough. And since it was after sunset, we didn't stick around in the windy cold. Turns out it was a Two Turban Delay, and we made the right decision.


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Observations for 2019 May 19


We arrived at the Lower Ham's Store at 14:05, a little over 9.5 hours after leaving home. All during the drive we expected to see a notice that someone had noticed a New Crater/Steamboat eruption on the seismograph trace. The last two intervals had been less than six days, and we were well over five days when we left. But nothing. So we were there long enough to drop off the bikes from the back of the truck and then head to Norris.

An hour later we were on the platform, joining the small group who reported seeing nothing much that was encouraging. We spent four hours there, and except for a twenty minute period midway through our wait, we saw nothing encouraging too. Most of the play was either by one or the other vent, but not together. The exception was several sustained, concerted surges aroun 17:10 . We weren't really prepared for an extended wait in temperatures in the upper 30s, either.

It didn't erupt on our drive back to check in to our Old Faithful Lodge cabin, so the plan is to get up at dawn and head north again. This time properly prepared for a day long wait.


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Observations for 2019 Jan 27


We had another chance today to stop at Tokaanu and try and see Taumatapuhipuhi. The geyser itself has been heavily altered, with a channel around 40cm deep cut through the side of the vent, through a sinter platform and leading to a couple of hot-pot bathtubs about 20 meters away. It is on private property, and is posted, so we kept discreet while waiting.

When we arrived, the water was slowly flowing down the channel, and there was near continuous bubbling from one side of the vent. About ten minutes after we arrived, suddenly the water rose up, and started splashing well above the rim. Some splashes were about 1.5 meters high, and the eruption lasted maybe 30 seconds.

After that, the water level dropped well below overflow, but after about twenty minutes, was back to about where we found it. So not surprised to see another eruption, almost identical to the first, with an interval of 28 minutes.

That was our last opportunity to see New Zealand geysers, at least for this trip. I think we saw about 15 total in five different thermal areas. All of them were different and unlike geysers we've seen before, the same way the thermal areas were unique.

Posting of videos will have to wait until we get back, when I can finally edit and then upload them. I took a lot, along with GPX recordings of our walks and hikes. Those will help locate the features and maybe make corrections as to what we actually saw in the case of Orakeikorako.


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Observations for 2019 Jan 26


Sort of encountered some thermal features today.

On the Mt.Tangariro Alpine Crossing, one comes across the Ketehani Hot Springs off to the side. This area, which is a privately owned inholding in the national park, has been closed for the last decade or so. It was getting too much abuse by hot potters and other Nature Lovers that the owning Maori tribe said "no more." Now there are barriers on the former trails to the site.

Over the years there have been reports of at least one geyser there, if not several. Now all you can see is thick steam coming up from behind the ridge hiding the hot springs gully.


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Observations for 2019 Jan 25


The day started with a little side trip to the mudpots at Te Kopia. Just a small turnout along a side road (which eventually is not paved) featuring some large mudpots.

We arrived at Orakeikorako at opening. Took the ferry across to the thermal area with little knowledge of what to expect. What we found was a series of terraces connected by boardwalks. The formations have been heavily altered, especially for the walkways, with deep gutters keeping the water from flooding them. There's also a loop, beyond the terraces, to the "thermal cave" and to some mudpots. These are worth a visit, but I doubt I'd go there again unless I had plenty of time there.

The first geyser we saw was Cascade. This feature erupts from a cavern in the Rainbow Fault, the wall the ends the first terrace. There's new, pink sinter being deposed by a geyser, that on the day we were there, erupted out of the crater to a couple of meters high every 6 minutes or so, lasting about 30 seconds. We saw lots of eruptions, because we spent a fair amount of time trying to see nearby Sapphire Geyser.

This appears to be a small gray vent on the flat at the base of the wall of the fault. Right after our first Cascade eruption, we saw steam come out of the area, and got in position to see the end of the water splashing. Reports we had said "hours" between eruptions, so we were a bit disappointed. We watched a few more Cascade eruptions, then move on up to the next terrace.

There wasn't much going on there. At the far end is the Golden Fleece fault, which was damp from water flowing over the edge, and on the extreme southern end, what appeared to be a runoff waterfall that suddenly picked up while we were looking at the area. Up there we found the Artists Palette. There's a great overlook at the eastern end, when most of the features can be seen, except for those directly below the overlook and hidden by the plant life.

During an hour or so there, we saw several erupting features. Based on Lloyd's map of the area from 1960, we saw activity in #742, #761, #764, and #760. There was also a perpetual spouter at the base of the Pyramid of Geysers throwing water from a pool to a height of about 3 meters. We also saw increased variations in activity from Psyche's Bath (#704) and #782. #764 erupted once, early in our visit. It's a large pool whose splashes reached two or thee meters, and it lasted about 3m30s minutes.

There were a lot of large, empty holes out there, Palette Pool and #742 being the most notable. We don't know if that is normal, or a variation in the activity. #742 erupted to about a meter high farily often from the empty crater, throwing water from one side across the crater.

Turns out that it was probably #764 that was putting out the water cascading over the fault scarp. It appears to be an intermittent spring that would frequently rise up a few centimeters and send out pulses of water. On the whole though, the Artist's Palette was a bit of a disappointment, as it didn't change much.

We decided to complete the loop, and then see if we could catch another Sapphire eruption. When we got back to the second terrace, we noticed some holes between the walkway and the rock wall behind it. This location is west of Wairiri Geyser. It was obvious that these three holes had broken out under the walkway, as the gutter cut into the sinter was clearly visible. They are large, each several meters across, and the one on the left had two vent craters. There was also a sheet of plywood nailed the the railing facing the holes.

Right after we arrived, suddenly the middle hole welled up and splashed for several second to about a meter. At the same time, the back right vent showed water. Afther this activity, the water dropped. There was some bubbling in the main vent, but no other changes. It didn't appear that any water had been discharged recently, as there were no damp catch pools.

We continued on, and saw the Soda Fountain. It appears to be perpetual, or at least has a long duration. It has a broad, several meter in diameter pool with considerable discharge.

Back at Sapphire and Cascade, we noticed that Sapphire would have a brief splash every 5 or 6 minutes. These splashes were coming closer together, so that after about 45 minutes, they were about two minutes apart. We then caught a real eruption. It build up from the splashes into spray of water to about three meters, and lasted about a minute.

After that, it was back to Artist's Palette, where there really wasn't much change. We decided that we wanted to try again for Sapphire, and so came back about an hour later and within ten minutes got another eruption. Again, the splashes were closely spaced.

It was time for some guru geyser gazing. The interval between the first and the second eruptions we observed was almost exactly three times the length of this interval. So we knew we wanted to be back in about an hour.

We'd heard report from some gazers who'd been to Orakekorako the week before of new activity, "at the end of Golden Fleece Terrace and next to the trees". We were able to determine that this indeed was the features that caused the walkway to be relocated. So it was back to Sapphire, where we got an eruption with about a 65 minute interval. For guru geyser gazing, not too bad.

We wanted to catch one last Sapphire before leaving (there's no facilities in the thermal area, and they said there's no return once you leave.) And still curious about the new features. This time we were rewarded. This time, without much warning, the left vents started splashing several meters high for nearly three minutes. There was no discharge. Then, about a minute after that, the middle vent filled and blipped water. It did this several times over the next five minutes, with the longest and biggest being the last one. But none of these matched what we had seen earlier in the day. It does appear that this feature had been undermining the walkway for quite a while, sort of like what Bulger's Hole had been doing.

Our final Sapphire interval was 60 minutes. On the whole, our guru geyser gazing worked out. The decreasing interval lengths might mean something, but we'll never know.And with that, it was time to leave.

Did visit one other thermal area. Next to the Tokaanu Spa is a thermal area with a free walkway. Along it were some soupy mudpots and hot pools, all surrounded by thick plant life. At the end of the walk loop was a fence with a sign saying "Private property" Beyond it is what is supposed to be a geyser. This feature has been heavily modified, with a deep trench cut into the formations to lead away the water. Reports I had were that it was erupting every few minutes for about 30 second. While the formations were wet with puddles, we saw nothing happen, not even steam, during the ten minutes or so that we were there. (Would have stayed longer, but needed to get to that night's lodging.)


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Observations for 2019 Jan 24


Today we had to take a boat ride to see the geyser activity.

Arrived at Waimangu as they were opening. The area takes its name from the ex-geyser. It's a several mile long hike down a series of volcanic explosion craters from the 1886 Tarawera eruptions to the shore of Lake Rotomahana. It was raining off an on for the first few hours, and we had two hours to get to the lakeshore for our boat ride. Fortunately, there is an infrequent shuttle bus, and we were able to take advantge of it several times.

At first we encountered several deep craters with weak thermal activity whose bottoms had pools mostly filled by rainwater.

The site of Waimangu Geyser is now a relatively flat area at the bottom of a crater with a stream around one side and lots of fumaroles and sputs along the stream banks. The first time we were there we didn't realize what it was.

From there the trail follows the stream, which has cut a deep gully in places, and the banks were lined with more activity. Some of the springs have already built up nice rims around them, and there could have been a geyser or two among all the sputs we saw there.

Just downstream from a bridge, there's a perpetual spouter putting up a thin, continuous stream of water to a height of two to three meters. Just before it was a mostly dry, large runoff channel. We climbed the steps the were beside it to the overlook for Inferno Crater.

Inferno Crater is a "crypto-geyser". It doesn't throw water into the air, but shows all the other behaviors associated with geysers-- primarily periodic discharge of water. In this case, the interval runs from days to weeks. The water level varies from heavy overflow to down several meters, We were there when it was low, but this was good, because that seems to be when it has the best color. In the morning, it looked a bit gray, thanks to the clouds and rain. But when we visited it a second time, in the sunny afternoon, it was a deep, bright blue.

We also visited Warbrick Terrace where there's a large apron of runoff punctuated by numerous small sputs.

The boatride was well worth it. The activity of the geyser we saw, "Pink Terrace Geyser", is dependent on the lake level. When we were there, the level was high. So high that some of the walkway by the shore was closed due to flooding. The higher the lake, the more vigorous the activity. What we saw lasted about 90 seconds or so and reached a height of around eight to ten meters. The boat operator said that the intervals were around seven minutes. Also along the shore were a number of other spouters, and some features drowned by the high lake levels.

Turns out we missed the Iodine Spring, which sometimes acts as a geyser. It's along the bus road, while we went by on the trail on the other side of the stream. From our vantage point, we did see what looked like another perpetual spouter over there.