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Observations for 2019 August 06

This morning's One Burst Grand was actually a little different. First, it took Vent about a minute longer than expected to start. Then, despite the One Burst Grand lasting just over eleven minutes, Vent & Turban continued. This was also a double interval of almost exactly eleven hours.

But while waiting for that eruption, Churn erupted. This was another full height play, lasting about a minute and about ten minutes before Grand. Immediately after I checked, and Churn was down below overflow with a 30cm rim. Sawmill was also low, at least 30cm and exposing some of the orange slime lining the vent. During the Grand eruption there was a second Churn eruption, again full height and duration. This activity is consistent with that of years past, where Churn would erupt in a short series about twenty minutes apart, when Sawmill was in a drain. Waited for a third eruption, but nothing happened.

The next One Burst Grand was fairly undistinguished, although it did continue the trend of intervals of under six hours. West Triplet did erupt during that eruption, but it lasted a little under nine minutes.

It was the next eruption of the day where things got interesting. I saw Turban in eruption as I was tying down my bike at Castle. When I got over to the area, I found that it looked like West Triplet was much higher than normal, just below overflow. About ten minutes later it overflowed weakly for about two minutes, with no activity from any of the sputs. After that, the water level in Grand rose to a good, strong overflow, and then showed waves.

At the 4h56m mark in the Grand interval, there was a strong boop from Grand. Over the next three minutes there were more of these boils. Finally the 5h01m mark, and at least 36 minutes after Turban last started, a boop turned into an actual eruption. This is the shortest interval I have ever seen out of Grand. Late in the One Burst Eruption West Triplet started to overflow. This continued after Grand and Vent and Turban quit. Finally after about eight minutes, West Triplet started splashing. This eruption of West Triplet was accompanied by some weak spitting from Sput D and Percolator, and lasted about 21 minutes. Vent & Turban quit when West Triplet did.