Last Known Eruption
91y 257d 51m ago

Latest Eruptions

Eruption DurationInterval
03 Feb 1932 @ 142645m 1h 1m
03 Feb 1932 @ 13256m 30s 1h 0m
03 Feb 1932 @ 12254m 1h 0m
03 Feb 1932 @ 11254m

Interval Statistics

Interval Count3
Min1h 0m
Max1h 1m
Mean1h 0m
Median1h 0m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
28278 16 Sep 2023 @ 1045 --- cb Greenish blue, clear, calm & overflowing
27896 01 Sep 2023 @ 1127 --- cb very clear, calm, greenish blue, overflowing. 3 Trees 3" blips & overflowing
27853 29 Aug 2023 @ 1856 --- cb To steamy to see this morning. Tonight it's clear, blue green in color, in overflow. 3 Trees bubbling 2-3" and overflowing.
27792 26 Aug 2023 @ 0920 --- cb pool is clear, green, in overflow, no bubbles. 3 trees has a weak blooping boil & in overflow.
27621 15 Aug 2023 @ 1605 --- cb a tad bit cloudy & greenish with small quarter-ping pong ball sized bubbles floating up and breaking the surface. They look like mini jellyfish. pool is in overflow & 3 Trees is active
27594 14 Aug 2023 @ 1505 --- cb pool is clear, greenish & overflowing. 3 trees is blooping to ~3"-4" and in overflow
27307 28 Jul 2023 @ 2114 --- SantaFe108 Clear and calm, no bubbles, and overflowing. 3 trees feature has tiny splashing.
27217 25 Jul 2023 @ 0855 --- mhreed Much less cloudy than on Sunday.
27195 24 Jul 2023 @ 1230 --- bbev Still cloudy and flat, no bubbles.
27168 23 Jul 2023 @ 1409 --- mhreed Cloudy blue-green color. Reported in this condition this morning by bbev.
27162 23 Jul 2023 @ 1312 --- bbev Looking a little milky today. Previous days observation have been that the pool has been clear and able to see the bottom. Not so today! Three trees is active and clear
27126 19 Jul 2023 @ 1138 --- Polly Crystal clear and calm 3 Trees bubbler is active Tiny bubbler on right is very small and intermittent.
27115 18 Jul 2023 @ 0932 --- Polly Crystal clear
27100 17 Jul 2023 @ 1005 --- Polly Clear and calm. Right bubbler is tiny and intermittent. 3 Trees has light steam.
27072 15 Jul 2023 @ 1135 --- Polly Emerald is clear and calm. 3 Trees active. Bubbler on right very tiny and occasional.
27065 14 Jul 2023 @ 1016 --- Polly Clear 3 Trees and tiny bubbler on right active Small amount of runoff
27046 13 Jul 2023 @ 1135 --- Polly Mostly clear - can’t tell for certain if it’s completely clear due to wind ripples. Tiny bubbler to right and 3 Trees active. No convection seen.
27030 12 Jul 2023 @ 1221 --- Polly Clear with little wind ripples. Bubblers are quiet. I cannot see any runoff. Similar at ~1600.
27029 12 Jul 2023 @ 0855 --- Polly Typical morning steam, but appears to be clear. 3Trees feature is steamy but did not see bubbles. Light overflow.
27010 11 Jul 2023 @ 0930 --- Polly Clear, can see to bottom. Convection left front. 3 Trees a little steamy, right bubbler quiet. Maybe a little overflow.
26992 10 Jul 2023 @ 1640 --- Polly Tiny bubbles and convection left of center. Still cloudy, but less so than 2 hours ago.
26991 10 Jul 2023 @ 1140 --- Polly Emerald is cloudy. Still cloudy at ~1425. Report of heavy rain that lasted about 10 minutes overnight that may be related.
26976 09 Jul 2023 @ 1757 --- Polly Back up and overflowing.
26975 09 Jul 2023 @ 1700 --- Polly Well below overflow.
26964 09 Jul 2023 @ 1445 --- cb clear, green, calm & in overflow. 3 trees is blurping to a few inches & overflowing
26971 09 Jul 2023 @ 1120 --- Polly Emerald is crystal clear this morning. I can see all the way past the logs to the bottom. I did not see any overflow. The right bubbler is slightly bubbling.
26911 08 Jul 2023 @ 1601 --- Polly Convection left front of pool. I cannot see the bottom. (Possibly at least partially due to clouds overhead.) 3 Trees and bubbler to the right are active.
26910 08 Jul 2023 @ 1246 --- Polly Both the Three Trees and a tiny bubbler to the right were ie. I can see to the bottom but there appears to be some slight convection (or possibly just from wind).
26909 08 Jul 2023 @ 1016 --- Polly Very steamy this morning. The three trees area to the left is steaming.
26820 04 Jul 2023 @ 0830 --- MAB clear green with upwelling - Three Trees too steamy to see but did get a few FLIR shots
26744 30 Jun 2023 @ 1049 --- cb clear, calm, green, in overflow
26637 24 Jun 2023 @ 1008 --- cb pool is clear, green, in overflow. 3 trees feature is bubbling to a few inches & in overflow
26508 20 Jun 2023 @ 1340 --- SantaFe108 Green and clear, did not see any bubbles. 3 Trees feature is blooping.
26135 07 Jun 2023 @ 1623 --- Polly Emerald Spring looks better to me than it did yesterday. It was still hard to tell if it was completely clear due to ripples from strong wind.
26121 07 Jun 2023 @ 1000 --- cb pretty steamy but from some clearing it looks to be back to green in color and clear. To much steam to see any bubbles.
26089 06 Jun 2023 @ 1500 --- cb pool is more turquoise blue than green. It's slightly cloudy with a few bubbles breaking the surface. in overflow
26136 06 Jun 2023 @ 1133 06 Jun 2023 @ 1140 Polly Bubblers on the left and right sides active. Light overflow front right. Convection seen in two points. Reflection of the clouds & trees in the pool (sun is behind a cloud). Back wall & logs on the bottom are fuzzy (not clearly seen). Strong sulfur smell.
25853 28 May 2023 @ 1915 --- SantaFe108 Overflowing with clear, green water. Spouter to the far left in the stand of fallen trees blooping and splashing <6 inches tall. RE cb: Thank you for the info! I was wondering if that was the 3 trees feature you were mentioning before!
25717 23 May 2023 @ 1025 --- cb clear, green & in overflow. 3 Trees feature is blooping to 2" with overflow
25669 21 May 2023 @ 1515 --- SantaFe108 Full and overflowing.
25474 15 May 2023 @ 2008 --- ypcaribou In active overflow as seen from Norris Sinks. Light gray deposit on hill in runoff channel!
25458 15 May 2023 @ 1809 --- ypcaribou light emerald, full to scalloped edge, can clearly see BB boardwalk below now.
24584 30 Oct 2022 @ 1816 --- ypcaribou Clear blue blue blue
24569 30 Oct 2022 @ 1428 --- ypcaribou Trickle of OF in 3 channels as seen from Norris Sinks
24593 30 Oct 2022 @ 0848 --- MAB Clear and steamy w overflow - 2018 spouter Three Trees ie to 2 or 3 inches
24472 21 Oct 2022 @ 0820 --- MAB Clear, blue, only convection seen zero boils - a few Teeny Tiny bubbles coming out from under east ledge - 2018 spouter Three Trees IE to 3in
24283 06 Oct 2022 @ 1319 --- cb Emerald spring is still calm, clear and more turquoise blue than green.
24270 05 Oct 2022 @ 1130 --- cb still more blue than green, calm, clear & in copious overflow. 3 trees feature is blipping to 2" and putting out small convection waves
24031 23 Sep 2022 @ 1642 --- MAB Beautiful! 2018 spouter Three Trees steamy with visible waves below it
23949 20 Sep 2022 @ 1524 --- ypcaribou Pretty, turqoise blue. Yellow lining pool.In overflow. Feature in trees to left quietly steaming.
23506 31 Aug 2022 @ 1322 --- cb clear, calm, Emerald green & overflowing. 3 Trees feature has developed a ~3-4" in diameter little pool and has a 1" roiling boil and overflowing down ES runoff channel. Has been mostly like this all summer
23283 19 Aug 2022 @ 1402 --- Craigmon99 Clear with slight convection
23103 08 Aug 2022 @ 1837 --- cb no change
23050 05 Aug 2022 @ 1106 --- cb no change with it or the 3 Trees area.
23011 03 Aug 2022 @ 1435 --- cb no change.
22963 01 Aug 2022 @ 1215 --- cb Emerald Spring is in copious overflow, clear, green and has some doming/convection over the vent with a (2) bubbles the size of golf balls that broke the surface. 3 Trees feature is erupting to 3" with runoff.
22945 30 Jul 2022 @ 1711 --- cb clear calm and in overflow
22860 26 Jul 2022 @ 1225 --- cb clear, calm and in overflow
22726 20 Jul 2022 @ 1211 --- cb clear, calm, green & overflowing. 3 Trees feature is active and blipping to 3".
22700 19 Jul 2022 @ 1128 --- cb clear, calm, green & overflowing
22625 16 Jul 2022 @ 1329 --- cb clear, calm, green & slightly in overflow.
22490 11 Jul 2022 @ 1555 --- cb clear, calm, Emerald green in color and in overflow.
22421 09 Jul 2022 @ 1008 --- cb Emerald Spring is clearing. Not so cloudy, more green than opalescent blue and i can see the edges of the pool. infrequent bubbles & slightly in overflow. Change!
22406 08 Jul 2022 @ 1334 --- cb bubbles have diminished some, not as strong or in as many areas in the pool. Still a fairly consistent string coming fr the main thumb area pool has dropped and is NOT in overflow. Still cloudy turquoise blue color with a distinctive sulfur dust accumulation around the edge. 3 Trees feature is bubbling to 2".
22387 07 Jul 2022 @ 1534 --- cb not in overflow, still cloudy, bubbling and a blue green color.
22386 07 Jul 2022 @ 1221 --- steve The water is cloudy/opalescent with new sulfur deposits.
22359 06 Jul 2022 @ 1113 --- cb no change
22311 04 Jul 2022 @ 1356 --- cb really no change. pool is still a opalescent green/blue color & cloudy. Not in overflow and still bubbling. 3 Trees area is active with small bubblers in its runoff
22286 02 Jul 2022 @ 1301 --- cb no change
22249 30 Jun 2022 @ 1418 --- cb same....
22204 29 Jun 2022 @ 1313 --- cb Cloudy, opalescent lime green color. Still same bubbles. pool has dropped & is no longer in overflow
22179 28 Jun 2022 @ 1437 --- cb Bubble bubble, toil and trouble! Still has the same boils in the same spots. Still lime green, cloudy & overflowing
22148 27 Jun 2022 @ 1140 --- cb Still opalescent lime green, cloudy, bubbling in same areas & overflowing.
22141 26 Jun 2022 @ 1832 --- cb ES has 3 areas in the Thumb of the pool that have a smallish roiling boil. (about 1.5' in D & blooping to a few inches.) 2 more smaller vents on the other side of the run off channel. It is in overflow, lime green and very cloudy. The 3 trees feature is the same as yesterday.
22128 25 Jun 2022 @ 1937 --- cb Emerald Spring has increased areas with small bubblers breaking the surface
22111 25 Jun 2022 @ 1029 --- cb 4D19H. ES Is a cloudy opalescent lime green color with roiling bubbles breaking the surface in the thumb on the boardwalk side of the pool. The pool is lower & in weak overflow. The 3 Trees breakout has a ~2" consistent boil with a breakout bubbler between it & ES in the green bacterial mat.
22102 24 Jun 2022 @ 0754 --- bbev Continued steady boil from two separate areas on near side of pool. Occasional boils from several other areas along that boardwalk side of pool. Pool is cloudy, murky green. No boil or bubbles seen yesterday. Harry the hare on guard
22063 22 Jun 2022 @ 1309 --- cb Pea soup yellowy, brown, green color, cloudy, calm & overflowing
21915 11 Jun 2022 @ 0815 --- cb clear, calm, green & overflowing
21787 06 Jun 2022 @ 1110 --- cb calm, overflowing, a bit cloudy (could be due to rain) and a dark green color. not its usual emeraldy color. could also be from rain events.
21692 03 Jun 2022 @ 1423 --- cb calm clear GREEN & in overflow
21636 01 Jun 2022 @ 1350 --- cb ES is clear, calm, overflowing and green
21542 27 May 2022 @ 1835 --- cb calm green and in overflow
21517 26 May 2022 @ 1400 --- cb clear, green in color, calm & overflowing
21466 24 May 2022 @ 1854 --- cb clear calm greenish and in overflow
21396 20 May 2022 @ 2105 --- ypcaribou Per SB note: ES calm, clear, and I think in overflow.
21349 17 May 2022 @ 0800 17 May 2022 @ 2000 ypcaribou Per SB entry: Emerald Spring calm and clear throughout the day.
21325 16 May 2022 @ 1355 --- Tara Clear, calm, and overflowing, blue-green color.
21276 14 May 2022 @ 1008 --- cb clear, calm, green & in nice overflow.
21211 07 May 2022 @ 1400 --- cb clear, calm, overflowing and greenish blue in color. 3 Trees feature is seeping water down the runoff channel, not bubbling or erupting.
21164 04 May 2022 @ 1445 --- cb ES is calm, emerald green in color, no bubbles & in slight overflow
21003 18 Apr 2022 @ 1845 --- MAB Very pretty - clear n calm - in decent ovfl out left channel - the 2018 spouter Three Trees was steamy w only the tinest of tiny waves visible in its waters
20947 06 Apr 2022 @ 1049 --- SteveO Overflowing and clear.
20609 07 Dec 2021 @ 0944 --- mwolf calm, no bubbles, more blue than green, not cloudy, overflowing
20271 03 Nov 2021 @ 1720 --- cb clear, blue, calm and overflowing
20150 27 Oct 2021 @ 1322 --- cb clear, calm, blue and in overflow
20123 25 Oct 2021 @ 1230 --- cb EMERALD SPRING is a little cloudy, VERY turquoise blue, no bubbles & overflowing.
20070 21 Oct 2021 @ 1307 --- mwolf calm, clear, blue, just barely overflowing
20062 19 Oct 2021 @ 1545 --- cb clear, calm, blue & in overflow
19997 16 Oct 2021 @ 1131 --- cb EMERALD SPRING is clear calm & in overflow
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