Last Known Eruption
37d 28m ago

Latest Eruptions

Interval Statistics

Interval Count15
Min21h 58m
Max19y 109d 2h 22m
Mean1y 317d 7h 41m
Median46d 16h 28m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35519 24 Jun 2024 @ 1135 --- Craigmon99 Bubbling nicely in the center.
35158 12 Jun 2024 @ 1855 --- JSJ Bubbling & roiling.
34914 05 Jun 2024 @ 1855 --- CrisG light bubbling
28176 10 Sep 2023 @ 0722 --- SantaFe108 Not erupting, overflowing and boiling.
27958 02 Sep 2023 @ 1830 --- SantaFe108 Not erupting, bubbling and blipping from center of pool.
15984 04 Sep 2020 @ 1149 --- Janet Jones Drowned out by overflow from Rainbow Pool (as I have seen every time I've visited this year).
11288 11 May 2019 @ 1150 --- Siegmund Did not see Handkerchief erupt during ~3 hours starting 1150 today, nor any other time on the 12th or 13th.
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.