Went out to Grand before midnight, and caught what was probably another Turban Delay Interval. That eruption of Turban lasted almost six minutes, while the next Turban eruption had no overflow from Grand. So the One Burst Eruption most likely occurred on the fourth Turban Interval after the Eruption Delay (D4).
2023-Aug-12:01:03:41 G1Q 01:03:41 Grand B1 --- d=11m58s 01:04:27 Turban 0m46s 01:07:03 Vent 3m22s 01:15:39 P1 11m58s 01:16:32 V&T Quit 12m51s ΣD=11m58s * * * * * Yesterday 23:48:33 d=5m55s 00:07:05 Int: 18m32s d=4m42s 00:26:31 Int: 19m26s d=4m01s 00:44:31 Int: 18m00s d=4m12s Grand: 19m10s
Less of a wait for the Grand eruption at dawn. Arrived in time to experience another Turban Delay Interval, but fortunately, the One Burst Grand was the result.
2023-Aug-12:07:12:31 G1Q 07:12:31 Grand B1 --- d=11m19s 07:13:49 Turban 1m18s 07:14:50 Vent Ovfl 2m19s 07:16:16 Vent 3m45s 07:23:50 P1 11m19s 07:24:41 V&T Quit 12m10s ΣD=11m19s * * * * * 06:47:44 d=0m54s Grand: 24m47s
Tried to visit the Lower Basin, but arrived at a nearly full Paint Pots parking lot at 09:00 to see Fountain in eruption. It was over by the time we walked out there. Based on an observation of Great Fountain the previous evening, we also decided to try biking out to it on another time.
The mid-day Grand turned into the afternoon Grand when another Turban Interval Delay took eight more Turban eruptions to recover. This eruption of Grand started with about 16 seconds of boops, including one shot up to 8 meters high, angled to the south. The start of the eruption itself was unimpressive, but fortunately, we got a second burst that was much higher. The second burst ended with a total eruption duration less than ten minutes, so it was disappointing when Grand's pool immediately drained with no attempt to refill.
2023-Aug-12:15:53:56 D8/G2C 15:53:39 Boop -0m16s 15:53:56 Grand B1 --- d=8m27s 15:54:50 Turban 0m54s 15:55:10 Vent Ovfl 1m14s 15:57:06 Vent 3m10s 16:02:23 P1 8m27s d=0m41s 16:03:05 B2 9m08s d=0m41s 16:03:46 P2 9m50s Vent & Turban continue ΣB=9m08s ΣD=9m50s * * * * * 12:40:13 12:55:54 Int: 15m41s d=4m21s 13:31:24 Int: 35m30s d=5m11s D0 13:49:19 Int: 17m55s d=4m21s D1 14:08:06 Int: 18m47s d=3m50s D2 14:25:49 Int: 17m43s d=3m42s D3 14:44:10 Int: 18m20s d=3m36s D4 15:02:17 Int: 18m06s d=3m47s D5 15:19:14 Int: 16m57s d=3m21s D6 15:36:20 Int: 17m06s d=3m44s D7 Grand: 17m35s
There is at least one raven which has learned to clean up after the crowd at Grand disperses. Sometimes there's been a companion, but it usually starts at the northern runoff and works its way down the benches. So far it's kept its distance from people but I expect them to start checking bags and packs at some point.
If Grand had erupted on the next Turban eruption instead of the one in which it did, this would not have been a four Grand day. Instead the One Burst Grand eruption came five minutes before midnight. There wasn't any Turban Delay Interval, just a series of Turban eruptions where the duration and the intervals were getting shorter. At around the eight minute mark in the eruption, there was a false pause, and then Grand continued for almost another three minutes.
2023-Aug-12:23:55:02 G1Q 23:54:50 Turban -0m12s 23:55:02 Grand B1 --- d=10m55s 23:57:31 Vent 2m29s 00:03:10 FP 8m07s 00:05:57 P1 10m55s 00:06:49 V&T Quit 11m47s ΣD=10m55s * * * * * 21:48:14 d=4m29s 22:07:55 Int: 19m41s d=4m04s 22:26:59 Int: 19m04s d=3m49s 22:45:49 Int: 18m50s d=4m02s 23:03:16 Int: 17m27s d=4m03s 23:20:44 Int: 17m28s d=3m15s 23:37:26 Int: 16m42s d=3m34s Turban: 17m23s