After not going out to last night's One Burst Grand Eruption, left at dawn for the next Grand opportunity. After a West Triplet eruption started, we got a Turban Delay Interval. That led to a short Turban eruption interval under 17 minutes, and then a Rift eruption that lasted about 13 minutes.
Grand tried again to have another Turban Delay Interval after four Turban eruption intervals, but that interval came up about a minute short. Then there was a short, almost 16 minute Turban interval, which finally led to the morning's One Burst Grand eruption.
2026-Jun-02 : 08:10:08 D6/G1Q 08:09:57 Vent Ovfl -0m11s 08:10:06 Boop -0m02s 08:10:08 B1 --- d=11m48s 08:10:15 Turban 0m07s 08:13:04 Vent 2m56s 08:21:56 P1 11m48s 08:22:34 V&T Quit 12m26s ΣD=11m48s * * * * * 05:45:15 d=03m18s 05:59:44 West Triplet d=51m17s 06:10:52 Int: 25m37s d=04m12s D0 06:27:46 Int: 16m54s d=03m42s D1 06:47:38 Int: 19m52s d=03m29s D2 06:48:22 Rift 07:08:39 Int: 21m01s d=03m54s D3 07:32:47 Int: 24m08s d=03m21s D4 07:48:46 Int: 15m59s d=03m19s D5 Grand: 21m22s
Later went to Fan & Mortar and spent over two hours watching nothing happen. For the first hour or so, there was a series of Fan vents splashing, sometimes fairly strong, alternating with nothing happening. Then Upper Mortar rumbled a couple of times, That's when Bottom Vent started to splash, and High and Gold became strong, tall and non-stop. When Fan's vents finally quit, that's when Main Vent started splashing. Most of the splashes were the small, just visible variety, but there were a few strong, noisy bursts that filled the crater. That activity lasted for well over an hour, and continued up to the time I left.
For the afternoon Grand, the wait was until West Triplet was ready. For almost the first two hours, nothing the Turban eruption intervals were a bit long, but otherwise uninteresting. Then there was a Delay Turban Interval lasting well over 30 minutes. Three Turban eruption intervals later, we got a second, even longer Turban interval that also ended in a Turban Delay interval.
Finally West Triplet started to erupt, and twenty minutes later Grand filled nicely and we got a long One Burst Eruption where Grand actually started on the early side of the Turban eruption interval.
2026-Jun-02 : 17:50:33 D3/D3/T1Q 17:50:00 Vent Ovfl -0m33s 17:50:09 Turban -0m24s 17:50:28 Boop -0m05s 17:50:33 B1 --- d=11m10s 17:53:03 Vent 2m30s 18:01:43 P1 11m10s 18:01:57 V&T Quit 11m24s ΣD=11m10s * * * * * 13:59:52 14:17:42 Int: 17m50s d=03m39s 14:38:39 Int: 20m57s d=03m53s 14:59:35 Int: 20m56s d=03m18s 15:20:10 Int: 20m35s d=03m38s 15:50:53 Int: 30m43s d=04m11s D0 16:07:42 Int: 16m49s d=02m32s D1 16:24:17 Int: 16m35s d=02m46s D2 16:58:30 Int: 34m13s d=04m11s D3/D0 17:15:06 Int: 16m36s d=03m18s D3/D1 17:30:51 West Triplet 17:32:32 Int: 17m26s d=03m19s D3/D2 Turban: 17m37s
While waiting, a black bear appeared out on the flat below the Rift runoff channel. It must have gone through the Sawmill Group or followed the river past Liberty Pool to get there. It continued onwards, crossing the river and was last seen headed for the bike trail.
Afterwards, based on a sunset eruption prediction for Great Fountain. Unfortunately, the sun disappeared behind a cloud bank even though it had about 15 minutes remaining before dropping below the horizon. But the Great Fountain eruption was strong, with a number of noisy, fairly tall looking jets. The first burst ended and we left before it got too dark.