Last Known Eruption
1y 324d 17h 34m ago

Latest Eruptions

03 Sep 2014 @ 2243 E maj23m 1y 34d 3h 13m
31 Jul 2013 @ 1930 E maj6y 162d 2h 30m
21 Feb 2007 @ 16005h 0m
21 Feb 2007 @ 1100 min1y 273d 21h 19m
23 May 2005 @ 1441 maj1y 213d 18h 15m
22 Oct 2003 @ 2026 maj178d 16h 32m
27 Apr 2003 @ 0354 E maj32d 2h 22m
26 Mar 2003 @ 0032 E maj193d 3h 12m
13 Sep 2002 @ 2220 maj140d 20m
26 Apr 2002 @ 2200 ie maj1y 359d 16h 0m
02 May 2000 @ 0600 ie maj8y 214d 14h 11m
02 Oct 1991 @ 1549 maj7y 7d 1h 14m
26 Sep 1984 @ 1435 maj20m 82d 5h 34m
06 Jul 1984 @ 0901 maj8m 23d 9h 11m
12 Jun 1984 @ 2350 maj~19m 19d 18h 50m
24 May 1984 @ 0500 A maj~15m 1y 293d 19h 57m
04 Aug 1982 @ 0903 maj75d 21h 9m
20 May 1982 @ 1154 maj7y 272d 3h 51m
23 Aug 1974 @ 0803147d 21h 33m
28 Mar 1974 @ 103030m

Interval Statistics

# of Intervals19
Min5h 0m
Max8y 214d 14h 11m
Mean2y 47d 8h 13m
Median193d 3h 12m

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
2586 29 Oct 2015 @ 1305 29 Oct 2015 @ 1318 billwarnock Steamboat is still in "zap" mode; no water from either north or south vents. Moderate steady steam.
2410 23 Sep 2015 @ 0950 23 Sep 2015 @ 1010 billwarnock Steamboat is still in "zap" mode with no minor eruptions and no overflow down channel.
2397 21 Sep 2015 @ 1520 --- MAB runoff channel below Steamboat on the way to Echinus - completely dry
2100 10 Aug 2015 @ 1155 10 Aug 2015 @ 1210 Micah Kipple For the very short time I was on the lower platform there were at least 3 strong concerted minors.
2021 05 Aug 2015 @ 2103 05 Aug 2015 @ 2132 RyanMaurer Obviously weak activity. watched for about a half hour. Near constant minor activity that would wax and wane. A "surge" would send water out of both vents simultaneously. The initial surges sent sustained water to above tree level from the North vent and to half way up the trees from the South vent. The first three held this jetting for about 20-25 seconds each and then would die down, build up, and die down until it almost stopped when it would immediately do another surge. The last two were concerted but weaker and not as consistent. Water output from North was wispy at best but did send waves down the channels. Water from south was heavy - Aurum like? Knowing how my statements get taken I'll state very clearly that I know this is very weak activity. The tall, sustained, and concerted activity was interesting enough that I felt it necessary to leave a note here - just in case ;)
1716 10 Jun 2015 @ 1227 --- udo For about an hour north vent shot above the trees around every 2 to 6 minutes in thin jets. South vent joined about 80% with some volume at times but was height challenged. September is coming.
1199 04 Sep 2014 @ 0000 --- Andrew Steamboat is believed to have had a major last night at about 2300-2350 hours.
1069 12 May 2014 @ 0847 --- Polly At 0847, a strong minor produced runoff that was like a mini-river.  I could hear it travel all of the way down the hill.  During the morning, my percentages of concerted minors were 85-87%.  Again, I saw some jetting in both the South and North Vents.  At times, I heard roaring coming from the South Vent area.  The wind was blowing towards me much of the morning, which probably enhanced the sounds.  It was steamy and hard to tell how high the South Vent minors were.  In the afternoon, the percent concerted had dropped to about 66%, but the runoff increased.  I left at 1400, but the YVO temperature graph shows another spike to ~32 degrees Celcius about 2 hours later.
1068 11 May 2014 @ 1444 11 May 2014 @ 1544 Polly Minors appeared to be about 50% concerted during the hour 1444-1544.  It was steamy and the wind was blowing toward me, so visibility was an issue.  I did see some jetting in both the South and the North Vents.  At times, there was a steamy pressure sound coming from near the South Vent.  The runoff was, at times, the heaviest that I have ever seen.  Two of the minors produced a deep rumble that I have not heard before.  The poor visibility kept me from seeing how high the South Vent went on those minors (my guess is not much higher than the trees), but they sounded strong.  This coincided with a high a ~32 degrees Celcius peak on the YVO temperature graph.
1054 27 Apr 2014 @ 0000 27 Apr 2014 @ 1200 Polly My brother Bob reports that he only had about 49% concerted this morning with low water.  He says that there is very little steam throughout the back basin this morning despite the low outdoor temperature.
1053 26 Apr 2014 @ 0000 26 Apr 2014 @ 2359 Polly My brother, Bob Partner, had just over 90% concerted minors during 2 nonconsecutive hours today.  He only counted those minors lasting longer than 30 seconds, so my percentage would probably have been lower.  He had one minor about 150% of the tops of the trees (standing on the mid-level platform).  Overall, though, he said runoff was low and most minors were on the short side.  Temperature graph from YVO has been down since 4/22 but likely dipped yesterday and rising today.  He left the area due to deteriorating snowstorm conditions.
1048 20 Apr 2014 @ 1548 20 Apr 2014 @ 1648 WillBoekel From 1548-1648 for minors there were 40 North Vent starts, 2 South vent starts, and 26 simultaneous starts.
Baseline does not exist.

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