Last Known Eruption
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Latest Eruptions

Interval Statistics

Not enough entries to compute statistics.

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13174 11 Aug 2019 @ 1303 --- JSJ Pool nearly full at 1303 - was low a little bit ago. 1307 - water level already lowered to out-of-sight.
4193 03 Jun 2017 @ 1200 03 Jun 2017 @ 1441 JSJ Basin nearly full, with a low doming eruption at 1200, then calmed down; water almost out of sight at 1203. Water visible at 1222. Water not visible at 1225. Water visible at 1301; nearly full basin & roiling at 1302 to 1305; water level lower at 1306; water out of sight at 1308. Basin full and overflowing at 1335, with roiling-boiling; water level lower at 1336. Water visible in basin at 1407, with low roiling-boiling; slightly calmer at 1410; water level lowered at 1411. Basin full & overflowing at 1441, with roiling; water level then lowered at 1441 - still with moderate to slight roiling.
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