Last Known Eruption
25y 155d 9h 16m ago

Interval Statistics

Interval Count12
Max26y 49d 18h 2m
Mean2y 80d 11h 52m
Median2h 28m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35904 14 Jul 2024 @ 1846 --- User34 Water out of sight in both vents
35538 24 Jun 2024 @ 1944 --- Craigmon99 Low. Right vent has opalescent blue with occasional bloop of water. Left vent has no visible water but loud water gurgle
34818 01 Jun 2024 @ 1345 --- Janet Jones Twin has much less water in it than it had a couple of weeks ago. The water level is now nearly out of sight.
34756 29 May 2024 @ 1739 --- Stephen_Gemar Water visible near the bottom of both craters. Each is boiling lightly. Facing the lake, the right vent has a more vigorous boil than the left.
28902 20 Oct 2023 @ 1116 --- Janet Jones Heavier boiling seen than on my last visit (last month) with small splashes from the left vent - bubbles still rising in right vent. Water level still below the clump of grass hanging on the side of the right vent.
28659 06 Oct 2023 @ 1539 --- steve Twin has warm water about 12-15 inches below overflow. The southern (right hand) vent is bubbling but likely not boiling. The water is opalescent.
28588 30 Sep 2023 @ 1520 --- DanS Both vents have water lightly boiling.
27899 01 Sep 2023 @ 1329 --- Graham Still has water and bubbling in both vents. A foot or more below the pools connecting.
26979 09 Jul 2023 @ 2146 --- minissa Can't improve over yesterday-s report except I would have called the left hand pool a continuous, vigorous blooping boil {center of pool} with right hand pool doing some intermediate blooping from vent that seems to open from aperture at 8 O' clock or at SSW as you're looking at it.
26927 08 Jul 2023 @ 1559 --- nails Both pools well below overflow with light gray water. Bubbling in left pool, gentle roiling in right pool.
26917 08 Jul 2023 @ 1140 --- Janet Jones Water is still gray and was just below the "tuft of grass in the right vent." Boiling in the left vent, bubbles rising in the right vent.
26537 20 Jun 2023 @ 1945 --- Craigmon99 Both pools full very full. Left (north) pool an inch or two from its overhang. Right (south) pool 2 inches below its bathtub ring. North vent sloshes occasionally with constant bubbling of varying strength. South vent intermittently bubbles after strong bubbling from north.
26276 12 Jun 2023 @ 1800 --- bhoppe no change of prior reports. each vent has gray milky water. Left vent was bubbling/boiling lightly
25816 27 May 2023 @ 1148 --- Stephen_Gemar Both cents are about 2/3 to 3/4 full of grey water, with both vents bubbling. The left vent has the more vigorous bubbles.
25388 12 May 2023 @ 1120 --- Janet Jones 3/4 full of gray water. Bubbles rising in both vents.
24240 05 Oct 2022 @ 1315 --- WillBoekel North vent lightly bubbling
24051 24 Sep 2022 @ 1300 --- Art Both vents still have water. North vent (left) heavily boiling and splashing up to 6 inches. South vent (right) lightly boiling at times with mostly light blooping bubbles. Similar to as described on 9-3-2022. No signs of major eruptions.
23549 03 Sep 2022 @ 1520 --- Graham Both vents still have water. Right vent is bubbling. Left vent has small splashes to 6 inches. there is what looks like some wetness inside the crater of both vents as if it has been splashed, but it may just be the natural colors. No evidence of anything big happening though. May also be just damp from the steam.
23427 27 Aug 2022 @ 1314 --- User34 Left pool is boiling and starting to fill the shallow part of the basin, just past the lip, but still a couple feet from overflow. Right pool is opaque blue and bubbling most of the time.
23356 23 Aug 2022 @ 0841 --- Craigmon99 Both vents have water and are bubbling. North vent more vigorous but south vent is constantly boiling
23189 14 Aug 2022 @ 1534 --- minissa Just following up on another gazer's previous observation. When we were here about 4 weeks ago, Twin was completely empty and Abyss and Black Pool were below OF and cool. Both look higher and warmer today, and the water in Twin is definitely steaming. Right/back vent has more water in it, clear and perhaps half full. Left/front vent more like a quarter to a third full and milky blue
23129 10 Aug 2022 @ 1147 --- Janet Jones Water visible in both vents with lazy bubbles rising. Water level just about half way from “out of sight” and “overflowing.”
19714 24 Sep 2021 @ 0753 --- SteveO Water in both vents completely out of sight, left vent lightly steaming.
14781 29 Jun 2020 @ 1347 --- bhoppe No water visible. Monkey flowers blooming in both vents.
12811 26 Jul 2019 @ 1642 --- nails No water or steam from either vent
11441 31 May 2019 @ 0932 --- Stephen_Gemar Completely empty; no trace of water at all. Steam only issuing from one of the vents.
11217 11 May 2019 @ 0704 --- ypcaribou Vents empty no steam.
8749 17 Jun 2018 @ 0715 --- ypcaribou Dry, no water visible in either vent, not steaming.
3194 03 Jul 2016 @ 1813 --- bhoppe Water level has risen 2-3 inches since last week. Clumps of grass which have grown in the southern vent in past years have been killed. Clump of grass on east bank of the south vent is nearly submerged.
16706 23 Aug 1998 @ 1821 --- JarnoO overflow started
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