Last Known Eruption
1y 152d 13h 1m ago

Latest Eruptions

Eruption DurationInterval
21 Oct 2017 @ 1514 ie44d 20h 55m
06 Sep 2017 @ 1819 ie33d 5h 23m
04 Aug 2017 @ 1256 ie56d 22h 16m
08 Jun 2017 @ 1440 ie21h 58m
07 Jun 2017 @ 1642 ie259d 7h 0m
21 Sep 2016 @ 0942 ie46d 16h 28m
05 Aug 2016 @ 1714 ie28d 3h 23m
08 Jul 2016 @ 1351~5h09m3d 19h 48m
04 Jul 2016 @ 1803 ie22d 3h 43m
12 Jun 2016 @ 142010d 19h 28m
01 Jun 2016 @ 1852 ie

Interval Statistics

Interval Count10
Min21h 58m
Max259d 7h 0m
Mean50d 16h 26m
Median30d 16h 23m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10377 18 Sep 2018 @ 1650 --- Siegmund Not IE any time I was at Black Sand Basin, 16-20 Sep 2018. (Longest observation period was today 1647-1805.)
9413 02 Aug 2018 @ 1543 --- JSJ Not erupting. Light pulsing with concentric ripples radiating outward from pool center.
8607 09 Jun 2018 @ 1954 --- JSJ Not erupting. Lightly roiling.
8555 02 Jun 2018 @ 0743 02 Jun 2018 @ 1906 Siegmund Handkerchief was silent during several drivebys on June 1st and 2nd, and during a 3-hour sit on June 4th. The water level in the crater near the boardwalk, which rises and falls when Handkerchief erupts, was the same (bubbling gently and ~10cm below overflow) every time I checked it. I suspect Handkerchief is dormant this season.
3724 27 Sep 2016 @ 1002 --- WillBoekel Stopped erupting.
3279 09 Jul 2016 @ 1615 --- JSJ Intermittent low splashing at 1615. Nothing more for the rest of the afternoon. No eruption or splashing in the late morning to 1615 either.
3310 02 Jun 2016 @ 1230 02 Jun 2016 @ 1345 JSJ Not erupting.
EntrySourceLinkComment
01 Jun 2016 @ 1852 JSJ http://www.youtube.com/watch?v=x_JFYiBxmCk Clips 1-6 of this video compilation (beginning to time stamp 2:20) show Handkerchief Pool erupting during the evening of 1 June 2016.
04 Jul 2016 @ 1803 JSJ http://www.youtube.com/watch?v=x_JFYiBxmCk#t=2m21s Clips 7-14 of this video compilation (time stamp 2:21 to the end) show Handkerchief Pool erupting during the evening of 4 July 2016.
Baseline does not exist.


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