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Observations for 2019 July 20


The moon was past full, but at 01:30 it was high up in the sky. As expected, the wind had died down and it hadn't gotten really cold yet so we headed out to Grand. It was also late enough (or early enough) that no one would be out there with a light.

Rift and Turban were both erupting as we approached. From the usual spot over Grand's main runoff I noticed a lot of steam back in the Sputnik area, and went down to investigate. Back there Sput A, the one in the runoff to the left of Sputnik at the site of North Triplet was erupting a thick plume of water about 1/2 meter high every few minutes. This is new activity to me. It and Rift quit about fifteen minutes after we arrived. Just four minutes later, Grand erupted,

It was so calm that the steam was making it hard to see at times. This One Burst Eruption at least lasted well over 11 minutes.

On our way back, while walking past Castle, it sounded like there were voices nearby. Over in the trees across the trail from Castle there was also a bright spot that didn't look like moonlight through the trees. I illuminated the area and saw at least a couple of people about 25 yards off the trail back there. I think they were trying to camp. In hindsight, I shouldn't have done that. Because it probably warned them to clear out.

Then I called the Comm Center, and for once they were able to dispatch someone to check things out. We talked for a bit, and I described what we'd seen. A companion arrived and then went on to check the area out, but didn't find anyone. At a minimum, I hope that somebody's night was ruined, and word got around that if you are going to camp in the thermal areas, you need to be more discrete.

Went out for the next Grand eruption. The boardwalks down from Crested were frosty, and there was the usual nasty slickness on the walkways past Rift. There was a Castle minor during our wait, which this time was for two Turban intervals. It was another One Burst Grand, but the backlighting, especially at the start, was quite nice.

It seemed like a good idea to head over to Beehive. Ended up seeing a couple of Old Faithful eruptions during the 2-1/2 hour wait. The South Bubbler was erupting about 15 minutes, and it looked a lot like what I'd seen from Sput A earlier in the dark. Then water was visible in the Indicator. This lasted for almost an hour until the indicator finally started.

But the eruption was quite nice. By then the breeze had picked up, and it had warmed up. I was standing on the northern side, and quite often the falling water looked like it was coming right at me, only to veer off to the south. It wasn't until near the end that the crowd at my end had to panic because they were getting wet.

For the noon-time Grand wait, it was standing room only because there was a terrible prediction on the board. Someone had calculated it an hour early, and the windows are already skewed too early. So a lot of people wasted a lot of time there.

It was another One Burst Grand, lasting a little under 10 minutes. But after draining, Grand's vent refilled and pulsed and acted like it was trying for a second burst for about 75 seconds. Vent started blasting away at about the minute mark. Then there was a sudden drain and Vent and Turban went silent.

Went out to see what Morning might be doing. Arrived in the parking lot in time for Fountain, but since we got a parking spot almost immediately, walked out to see the rest of the eruption. The conditions were ideal-- warm and dry and sunny blue sky and just enough breeze to move the steam away from the walkway.

The evening brought a Turban delay at Grand, which probably made the eruption better, as it allowed the sun to drop closer to the horizon. Another Turban interval and the sun would have been below the ridge. This time when Grand's vent refilled, it managed to give a second burst.

After dark headed back out to Fountain, and this time we had to wait a few minutes for the start. The duration was 34m30s, which means that we need to be back out for the next eruption, as things are looking good for Morning.