Last Known Eruption
2y 276d 2h 18m ago

Interval Statistics

Interval Count100
Min2m
Max246d 22h 56m
Mean11d 4h 32m
Median3m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
15677 22 Aug 2020 @ 1012 22 Aug 2020 @ 1136 User34 Inactive, water gurgling out of sight
15595 16 Aug 2020 @ 0915 16 Aug 2020 @ 1035 User34 Inactive, gurgling out of sight
14814 30 Jun 2020 @ 1819 --- Graham Formation looks very dry and has gurgling at depth.
10909 25 Jan 2019 @ 1000 --- Graham no eruption after 0950
8702 15 Jun 2018 @ 1544 --- JSJ Off (waited for a while), but continuous audible subterranean gurgling.
2964 04 Jun 2016 @ 1755 --- JSJ Shell Spring empty, quiet, dry.
EntrySourceLinkComment
06 Aug 2018 @ 1431 JSJ https://www.flickr.com/photos/jsjgeology/44530143112 Photo (out of 4) of Shell Spring erupting during the afternoon of 6 August 2018.
06 Aug 2018 @ 1431 JSJ https://www.youtube.com/watch?v=ZOvfJGMvh18 Time lapse video of Shell Spring's eruptive cycles during the afternoon of 6 August 2018, followed by a relatively deep drain.
Baseline does not exist.