There wasn't a Turban Delay interval, but Grand still took nearly 2-1/2 hours after my arrival before sunrise to finally have the One Burst Eruption. For six Turban intervals, both the durations and the intervals got short so that the Grand eruption was less than 16 minutes after a Turban eruption lasting less than 3-1/2 minutes. Were fortunate to have Grand erupt when it did, as a thunderstorm moved in as we were leaving, with a downpour about twenty minutes later.
2024-Aug-20:08:40:19 T1C 08:40:02 Turban -0m16s 08:40:19 B1 --- d=10m53s 08:43:09 Vent 2m50s 08:51:12 P1 10m53s Vent & Turban continue ΣD=10m53s * * * * * 06:22:31 d=01m39s 06:35:46 Int: 13m15s d=04m39s 06:53:52 Int: 18m06s d=04m07s 07:11:57 Int: 18m05s d=03m59s 07:30:57 Int: 19m00s d=03m38s 07:49:18 Int: 18m21s d=03m33s 08:07:07 Int: 17m49s d=03m29s 08:24:23 Int: 17m16s d=03m27s Turban: 15m38s
Ended up waiting less than two Turban eruption intervals before the next Grand eruption. The interval on which Grand eruption was almost a Turban Delay interval, but came about 25seconds short. It took Turban almost a minute to start its eruption. The first burst lasted 9m18s, and the pause between the bursts was short, at 21s. It also had a sort of two meter high boop before starting. It was a windy day, and my camera tripod tried to take flight on a couple of occasions.
2024-Aug-20:15:24:52 G2Q 15:24:45 Boop -0m07s 15:24:52 B1 --- d=09m18s 15:25:48 Turban 0m56s 15:27:41 Vent Ovfl 2m49s 15:28:36 Vent 3m44s 15:34:10 P1 9m18s d=21s 15:34:31 B2 9m39s d=44s 15:35:15 P2 10m23s 15:36:01 V&T Quit 11m09s ΣB=10m02s ΣD=10m23s * * * * * 15:00:17 d=04m03s Grand: 24m35s
Decided to kill some time at Riverside, but after about 15 minutes, got a radio call about Beehive's Indicator in eruption. As it had been less than twelve hours since the pre-sunrise eruption, decided to abandon Riverside and head to the Firehole River overlook. The Indicator lasted at least 27 minutes, and looked like we might be getting a False Indicator. Until the last five minutes or so, there was only some weak splashing from Beehive.
Grand could've taken the opportunity to erupt instead of having a Turban Delay interval. The moon had just risen above the trees, and it would have been nicely backlit. Instead it was six Turban intervals later, and after midnight, when Grand behaved like it was going to erupt. It wasn't a Turban Delay interval, as the interval was less than 22 minutes. For the next Turban eruption there was no overflow, as if it had been a Delay interval.
Grand finally had the One Burst Eruption on the eighth interval, lasting under 9-1/2 minutes. Uncertain was gurgling steadily as we left, but after being out that long, decided it didn't need me around in order to erupt.
2024-Aug-21:00:40:08 D8/G1C 00:40:08 B1 --- d=09m23s 00:49:32 P1 9m23s Vent & Turban continue ΣD=09m23s * * * * * 21:33:35 d=04m47s 21:50:56 Int: 17m21s d=04m16s 22:16:33 Int: 25m37s d=04m21s D0 22:32:58 Int: 16m25s d=04m24s D1 22:51:56 Int: 18m58s d=03m57s D2 23:10:37 Int: 18m41s d=03m50s D3 23:28:12 Int: 17m35s d=03m24s D4 23:44:23 Int: 16m11s d=03m35s D5 00:06:09 Int: 21m46s d=04m21s D6 00:24:19 Int: 18m10s d=03m39s D7 Grand: 15m49s