Was quite surprised to learn that Grand erupted shortly before dawn. Had expected (and planned) on it erupting several hours earlier. The interval was so long that I suspected a Rift eruption, but when I got out there, it was obvious that Rift had not erupted overnight.
So instead I spent some time taking videos in the Sawmill Group. Got to see heavy bursting from Spasmodic as it dropped, Oval Spring having good size bursting from the north (front) vent, multiple eruptions of Tardy, the end of a Sawmill eruption, and a Penta steamphase minor.
Missed the start of the last item, as I was set up to record Bulger and Old Tardy (which ended up doing little to nothing), but quickly moved the camera over to Penta. Once that was over, it seemed like activity in Bulger did pickup a little.
Sawmill Group_2024-Sep-06_0910
---------------
2024-Sep-06
09:10:37 Start Observations Other Event
09:10:59ie >>>Eruption : d=35m44s Sawmill
09:11:08ie >>>Eruption : d=09s Tardy
09:11:17 End Eruption Tardy
09:11:35 Low, North vent active Oval Spring
09:12:22ie >>>Eruption Tardy
09:14:21 Dropping, active Spasmodic
09:17:02 >>>Eruption Tardy
09:18:00 >>>Eruption Tardy
09:18:17 >>>Eruption Tardy
09:18:44 >>>Eruption : d=01m59s Tardy
09:20:09 End Eruption Tardy
09:25:41 >>>Eruption Tardy
09:27:20 >>>Eruption : d=01m37s Tardy
09:28:57 End Eruption Tardy
09:32:06 Splashes Tardy
09:32:32 Frequent splashes Tardy
09:33:18 >>>Eruption : d=32s Tardy
09:34:23 Splashes Tardy
09:35:53 >>>Eruption : d=01m23s Tardy
09:37:16 End Eruption Tardy
09:40:06 Splashes Tardy
09:41:31 Frequent splashes Tardy
09:41:53 >>>Eruption : d=01m48s Tardy
09:43:41 End Eruption Tardy
09:45:44 Splashes Tardy
09:46:43 End eruption Sawmill
09:48:00 >>>Eruption Tardy
09:59:18 Below lobe level Belgian Pool
10:00:14 Splashes Bulger
10:12:24 >>>Eruption : d=16m02s,min Penta
10:19:09 Splashes Bulger
10:28:26 End eruption Penta
10:29:32 >>>Eruption : min Old Tardy
10:30:39 Heavy steam Penta
10:33:17 >>>Eruption Oval Spring
Low pool, north vent
10:45:10 Splashes Bulger
10:45:49 >>>Eruption Daisy
10:47:52 Splashes Bulger
10:59:08 Splashes Bulger
11:01:03 Splashes Bulger
11:06:04 >>>Eruption Sawmill
11:07:25 Start ovfl Sawmill
11:17:02 End Observations Other Event
After Sawmill restarted, I took a break, and got back in time to begin waiting for Uncertain. At first Uncertain was making lots of gurgling sounds, with an occasional visible splash. Then, quite quickly, Uncertain became quiet. That turned out to be due to it rising in the vent. We witnessed a couple of floods coming from the vent before one of them triggered the Uncertain eruption.
After that, it was a bit early, but still time to wait for Grand. I wasn't paying close attention when I realized that Grand's pool was full and having small waves at the six hour mark. Got the camera started in time to capture a couple of the strong boops. As expected, the pool level quickly dropped well before Turban finally erupted.
Three Turban eruption intervals later, we got a repeat of that performance. This time there were at least five boops, with several well over a meter high. Turban finally erupted just after the 25 minute mark.
So once again we had to wait three more Turban eruption intervals. This time the pool filled early, around the fifteen minute mark, but did start having wavelets until several minutes later. Again, there was some booping from Grand, but this time we finally got the One Burst Eruption, which lasted well over eleven minutes, with Vent & Turban quitting within a minute, and restarting within another six minutes.
2024-Sep-06:14:32:02 B3/D3/G1Q 14:31:53 Boop -0m08s 14:32:02 B1 --- d=11m19s 14:32:22 Vent Ovfl 0m19s 14:32:39 Turban 0m36s 14:35:19 Vent 3m16s 14:43:21 P1 11m19s 14:44:16 V&T Quit 12m13s 14:49:58 V&T Restart 17m56s ΣD=11m19s * * * * * 12:34:57 d=05m45s B0 Boop: 12:30:45 12:52:54 Int: 17m57s d=04m28s B1 13:13:24 Int: 20m30s d=04m10s B2 13:38:38 Int: 25m14s d=04m35s B3/D0 Boop: 13:35:05 13:55:40 Int: 17m02s d=04m06s B3/D1 14:12:55 Int: 17m15s d=03m39s B3/D2 Grand: 19m06s
The next Grand eruption would be in the dark. Unlike the last few intervals, however, the wait for this One Burst Grand was short, only 6-1/2 hours. The Turban eruption interval was not quite long enough to be a delay. Once again the eruption started with several boops. We heard the first one in the dark, 15 seconds before the eruption.
2024-Sep-06:20:59:27 G1C 20:59:12 Boop -0m15s 20:59:27 B1 --- d=10m25s 21:03:03 Vent 3m36s 21:09:52 P1 10m25s Vent & Turban continue ΣD=10m25s * * * * * 20:35:21 d=04m42s Grand: 24m06s