Then went out to catch Artemisia, which hadn't been seen since yesterday morning. Got down to Fan & Mortar and the activity had changed. Now Fan's Gold and High vents were active, while Main and Mortar's Bottom vent was quiet. High was erupting at least four meters high at times, and if Angle had also been active, it would have looked like an eruption was imminent. As it wasn, the activity died down.<\/p>\n\n\n\n
Headed for Artemisia again, and this time got delayed by East Sentinel. The vent was dead calm, with only occasional slight ripples over the locations of the vents along the back side. There was considerable runoff, and it looked like it might be fluctuating. I took some video, and that's when Artemisia started to erupt.<\/p>\n\n\n
![\"\"](\"http:\/\/geysers.org\/wordpress\/wp-content\/uploads\/2026\/05\/IMG_8162-1-1024x768.jpg\")
<\/figure><\/div>\n\n\nSo I headed back to Fan & Mortar, where High and Gold continued to look good. At some point Angle joined in, and again there was the appearance of the start of an eruption. For the next half-hour or so, those vents could cycle from quiet to quite strong.<\/p>\n\n\n\n
By mid-afternoon our good weather had deteriorated to the point where I decided I'd better bring a jacket, which I ended up putting on shortly after I arrived at Grand.<\/p>\n\n\n\n
West Triplet was in eruption as I was tying up my bike, and Turban erupted right after I arrived. Not surprised when Rift started about a half hour later. That eruption lasted well over 1-3\/4 hours. At about 1-1\/4 hours in, Turban had a Delay Eruption interval.<\/p>\n\n\n\n
After that, the durations and intervals of the Turban eruptions got noticeably shorter, until the fifth eruption ended up being another Turban Delay interval. For this next series, the intervals were even shorter, with all but one under 17 minutes. They all seemed to have early fills of Grand's pool, which would then drop just before Turban started to erupt,<\/p>\n\n\n\n
Then on the fifth interval, Grand was full at around 11-1\/2 minutes and started having waves. These built up such that at 13 minutes, Turban started to erupt. Then Vent started to overflow, and finally a half minute later Grand started after a series of Boops. This Turban interval preceding Grand is one of the shortest I've ever seen.<\/p>\n\n\n\n
Once again we had a One Burst Grand eruption, but for the last few minutes, the clouds parted and the eruption was illuminated by the setting sun. The duration was just over ten minutes, and despite being short, Vent & Turban quit.<\/p>\n\n\n\n
2026-May-25 : 20:11:22 D5\/D5\/T1Q\n\n 20:10:39\tTurban\t-0m43s\n 20:10:46\tVent Ovfl\t-0m36s\n 20:11:15\tBoop\t-0m07s\n 20:11:22\tB1\t--- d=10m06s\n 20:13:33\tVent\t2m11s\n 20:21:28\tP1\t10m06s\n 20:22:22\tV&T Quit\t11m00s\n\n\t\t\t\t \t\u03a3D=10m06s\n\t* * * * *\n 15:13:41ie\tWest Triplet\n 15:19:01\t\t\td=01m54s \t\n 15:35:33\tInt: 16m32s\td=03m25s \t\n 15:47:04\tRift\n 15:55:24\tInt: 19m51s\td=03m22s \t\n 16:14:40\tInt: 19m16s\td=03m54s \t\n 16:34:03\tInt: 19m23s\td=03m42s \t\n 17:06:38\tInt: 32m35s\td=03m38s D0\t\n 17:24:51\tInt: 18m13s\td=03m11s D1\t\n 17:42:29\tInt: 17m38s\td=03m06s D2\t\n 18:01:44\tInt: 19m15s\td=02m31s D3\t\n 18:19:30\tInt: 17m46s\td=03m08s D4\t\n 18:50:14\tInt: 30m44s\td=04m11s D5\/D0\t\n 19:07:42\tInt: 17m28s\td=03m06s D5\/D1\t\n 19:24:25\tInt: 16m43s\td=03m28s D5\/D2\t\n 19:41:10\tInt: 16m45s\td=03m45s D5\/D3\t\n 19:57:38\tInt: 16m28s\td=03m08s D5\/D4\t\n\t\t Turban: 13m01s\n<\/pre>\n\n\n\nJust as several of us walked up to our bikes, Castle started to erupt. By then the sun was even lower, and Castle was nicely illuminated. We were prepared to watch the eruption, but it was a minor that lasted less than four minutes.<\/p>\n","protected":false},"excerpt":{"rendered":"
With all the shorter Grand intervals recently, I decided that 13 hours was a good interval for a double overnight interval. The overnight eruption was caught on the webcam, and my projected arrival time didn't change. A nice clear morning, the first one of this visit. Got out to Grand in time to see heavy … Continue reading \"Observations for 2026 May 25\"<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[133,4],"tags":[],"_links":{"self":[{"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/posts\/3922"}],"collection":[{"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/comments?post=3922"}],"version-history":[{"count":1,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/posts\/3922\/revisions"}],"predecessor-version":[{"id":3925,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/posts\/3922\/revisions\/3925"}],"wp:attachment":[{"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/media?parent=3922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/categories?post=3922"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/geysers.org\/wordpress\/wp-json\/wp\/v2\/tags?post=3922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}