Last Known Eruption
65y 96d 3h 47m ago

Latest Eruptions

Eruption DurationInterval
05 Sep 1959 @ 0000 A

Interval Statistics

Not enough entries to compute statistics.

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10735 17 Oct 1959 @ 0600 17 Oct 1959 @ 2100 JSJ Large daytime Sapphire Pool eruption on 17 October 1959. Info. from public domain image posted at the YNP website (digital slide collection). See attachment.
10734 07 Sep 1959 @ 0600 07 Sep 1959 @ 2100 JSJ Big daytime eruption of Sapphire Pool on Labor Day 1959. Info. from public domain image of eruption at YNP website (digital slide collection). See attachment.
No attachments for this geyser.
Baseline does not exist.