Last Known Eruption
89y 326d 7h 41m 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
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
19982 15 Oct 2021 @ 1240 --- cb EMERALD SPRING is turquoise blue, clear, calm & overflowing.
19937 08 Oct 2021 @ 1056 --- cb 9D 21.5H PE.. Emerald spring is clear, calm, turquoise blue and in overflow. THAT WAS brief!
19934 07 Oct 2021 @ 1716 --- cb EMERALD SPRING is a bit clearer today with fewer bubbles & more blue than pea green again. Definitely not clear tho! It is still in overflow.
19913 06 Oct 2021 @ 1024 --- cb pool is a cloudy pea soup green color with skattered bubbles breaking the surface on the east side, in the thumb.
19893 05 Oct 2021 @ 1815 --- cb EMERALD SPRING is a cloudy greenish color and there are tennis ball& ping ping ball sized bubbles breaking the surface on the east side of the pool and by the outlet channel. (bw side) It is in overflow. The 3 trees feature is active again with 3 more small vents (quarter sized) in its runoff channel. HUM, DOES this explain the SV major minor, the 40° spike on the temperature graph, that happened on 10/3 @ ~1900?
19856 02 Oct 2021 @ 1300 --- cb clear, calm, in overflow & more blue than green
19806 30 Sep 2021 @ 1153 --- cb Emerald spring is clear, calm, turquoise & in overflow.
19750 26 Sep 2021 @ 1200 --- cb clear, calm more blue than green and in overflow
19577 15 Sep 2021 @ 0844 --- cb EMERALD SPRING is calm and in overflow.
19543 13 Sep 2021 @ 1754 --- cb Pool is high, in overflow, clear, calm & blue green in color.
18740 30 Jul 2021 @ 0540 --- ypcaribou Well below overflow. Scalloped edges sticking out above water level. Clear & "chlorinated swimming pool blue."
18576 22 Jul 2021 @ 0918 --- Tara Calm, clear, greenish blue, down about 2 inches below rim with no overflow. side vents overflowing lightly.
18389 12 Jul 2021 @ 1813 --- cb Pool is VERY low! 2" of exposed sinter rim in front of the runoff channel. needless to say it is NOT in overflow. Pool is a milky (cloudy) opalescent turquoise blue color, has more and slightly bigger bubbles (golf ball-tennis ball sized) breaking the surface in the thumb and side closest to the boardwalk, also one area on the far side of the pool.
17990 21 Jun 2021 @ 1000 21 Jun 2021 @ 1100 Polly Time approximate. Emerald seemed to be getting clearer during this time.
17942 20 Jun 2021 @ 1232 --- cb pool is cloudy and more blue than green this afternoon.
17600 09 Jun 2021 @ 1000 --- Tara Greenish blue, clear, and calm.
17627 09 Jun 2021 @ 0902 --- novakg Quiet with slight SW overflow.
17580 08 Jun 2021 @ 1001 --- cb clear, calm, green in color and on slight overflow
17522 07 Jun 2021 @ 0802 --- cb steamy, clear, calm & slightly overflowing
17472 05 Jun 2021 @ 1010 --- cb clear, calm, green and SLIGHTLY overflowing. just enough to dampen the channel
17440 04 Jun 2021 @ 1605 --- cb clear, calm and runoff channel is damp but no obvious sign of overflow. I think the occational wind gust is forcing water over the ridges and into the channel.
17443 04 Jun 2021 @ 0935 --- cb clear, calm and blue/green in color. Not in overflow. 3 Trees features are not as active.
17387 02 Jun 2021 @ 1437 --- Tara Clear and calm.
17383 02 Jun 2021 @ 0945 --- Tara Slightly murky, calm, blue-green color.
17330 01 Jun 2021 @ 0939 --- cb slightly cloudy, more blue than emerald green, calm and just slightly overflowing.
17272 30 May 2021 @ 1513 --- cb Pool us clear, greenish and mostly calm. it is slightly in overflow. It has a few occasional quarter sized bubbles that break the surface. they are mostly on the east edge of the pool by the thumb. The "3 trees" feature that is outside the pool toward the boardwalk is erupting 3" and putting a fair amount of water down Emeralds run off channel.
19303 30 May 2021 @ 0925 --- research-mab 30 May 2021 @ 0925 BEN VL EMERALD See Note under Steamboat Emerald cloudy this morning (low wind) but cleared up quite a bit by the time I left. It seems like it has been alternating btwn clear and cloudy each day for a while. Echinus has also been alternating clear and murky each day. It seems that whenever ES is clear, Echinus has been that cloudy filthy brown color from last year, and visa versa. The one note where I saw something sort of interesting from a few days ago, ES was clear and Echinus was murky. https://geysertimes.org/note.php?id=17268
17249 29 May 2021 @ 1800 --- bbev Emerald is clear, overflowing, and bubbling at both near and far sides of pool. Small marble sized bubbles every 15-20 seconds in several different areas.
17227 28 May 2021 @ 1010 --- Suzanne The periodic bubbler was seen at the back side of the pool, the same one that was seen on May 26. No bubbles seen on the front side. Pool was slightly cloudy.
17231 28 May 2021 @ 0926 --- bbev Little cloudy. Golf ball sized bubbles on far side of pool. Not overflowing.
17226 28 May 2021 @ 0700 --- Suzanne There were periodic small bubbles seen at the front of the pool, the side near the boardwalk. it was too steamy to see the back.
17191 26 May 2021 @ 1000 --- Suzanne Pool was green but slightly cloudy and barely overflowing. There was a small bubbler near the edge of the pool on the side farther from the boardwalk. I saw it at 1000 and 1030 but it had stopped when we walked by at 1125. It resumed at about 1130 and the bubbles were very frequent (about 1 every 2 seconds).
17149 20 May 2021 @ 0830 --- cb Nicely overflowing. clear, calm with no bubbles
17137 19 May 2021 @ 1827 --- cb Emerald spring's pool is SLIGHTLY in overflow. It was not at around 1000. color is more aguamarine blue than green and it has some small bubbles that break the surface. The 2 bubblers in the 3 Trees area have increased in activity and are putting more water down ES runoff channel.
17117 17 May 2021 @ 1600 --- cb Pool is higher than I've observed. Clear, green, calm and good overflow
17086 14 May 2021 @ 0850 --- cb Steamy blue greenish in color. no audible bubbling sounds. in very slight overflow. 3Trees features overflowing slightly.
17052 11 May 2021 @ 1520 --- Tara calm, light greenish blue color, overflowing lightly
17048 11 May 2021 @ 1048 --- cb MUCH clearer, color is blue green. a VERY slight trickle of overflow. 3 Trees feature is steaming and producing water down the runoff channel but no visable "eruptive" activity.
17041 10 May 2021 @ 1308 --- User34 Clear, calm, barely overflowing
17021 09 May 2021 @ 1130 --- cb color is still a cloudy milky turquoise blue. The pool has come up a bit but still not overflowing down the runoff channel. The bubbles have decreased is size and quantity. Just a few that break the surface in the "thumb" area and are the size of a Meyer 🍋 lemon!
17013 08 May 2021 @ 1500 --- cb Emerald spring is still very cloudy, milky turquoise blue in color. Much like I've seen Cistern look like! It still has tennis ball-grape sized bubbles breaking the surface and sending out convection waves, mostly along the side closest to the boardwalk. pool is low and NOT in overflow. The 3 Trees feature on the side of Emerald, closest to the boardwalk, has 2 small vents erupting 2 - 3". I call it 3 Trees because there are 3 fallen dead trees and these vents are close to the base of those 3 dead trees.
17009 07 May 2021 @ 1101 --- cb ES is milky turquoise blue in color with 3 areas, on the east side of the pool, that have ping pong ball - tennis ball sized bubbles that break the surface occationally and send out small convection waves. It is not in overflow. The small bubblers that I call "3 Trees" on the edge of the tree line to the south, now has 2 vents that erupt to 2 - 3" and put water down ES runoff channel.
16998 06 May 2021 @ 1933 --- cb ES has ~5 areas along the East side of the pool that have ping pong ball- softball sized bubbles breaking the surface and sending out ripples into the pool. Pool is a cloudy greenish color and is in overflow.
16967 30 Apr 2021 @ 2009 --- MAB Calm, a little visible convection, in overflow left side - South Spouter area steamy
16901 20 Apr 2021 @ 1822 --- MAB in overflow on left channel - visible upwelling - south spouter area steamy
16851 13 Feb 2021 @ 1440 --- Micah Kipple Clear and calm
16844 06 Feb 2021 @ 1405 --- Micah Kipple Nearly clear. No roiling or bubbles.
16842 04 Feb 2021 @ 1600 --- Micah Kipple No longer roiling and bubbling. Returning to (but not quite completely) clear again.
16833 28 Jan 2021 @ 1613 --- Micah Kipple Cloudy. At least two points of bubbling and roiling 1-2 inches along near crater rim.
16827 24 Jan 2021 @ 1547 --- markwolf slightly more opaque and about 1 cm low
16479 29 Oct 2020 @ 0929 --- MAB good overflow in left channel, none on right side. fairly calm but I could hear a few bubbles
16408 11 Oct 2020 @ 1600 --- cb overflowing nicely!
16509 11 Oct 2020 @ 1430 --- jonp Blue-Green color; Steady overflow.
16404 10 Oct 2020 @ 1255 --- cb clear, calm, blueish green and pool low, barely in overflow
16354 06 Oct 2020 @ 1623 --- cb Still clear, calm, in overflow and more turquoise blue than green.
16336 05 Oct 2020 @ 1915 --- cb Emerald Spring is calm, blue green in color and nicely overflowing.
16319 02 Oct 2020 @ 0920 --- cb Emerald is very steamy this morning. It is calm, green/blue and overflowing. FYI: The small feature in the trees to the east of ES runoff channel (by where the boardwalk narrows) that I've referred to as "3 trees" has been active all summer and is really overflowing these past 3 weeks.
16256 25 Sep 2020 @ 0830 --- cb clear, calm and blue green
16208 20 Sep 2020 @ 0915 --- cb Emerald's pool is back to its typical height I've seen all summer and overflowing nicely down its channel
16192 19 Sep 2020 @ 0900 --- cb First time this summer I've seen Emerald BARELY in overflow. The pool is low just a thin, barely observable, trickle of water down its runoff channel. Pool is calm and still greenish blue in color.
16044 05 Sep 2020 @ 0700 08 Sep 2020 @ 2120 underarockphoto With the sole exception of Monday, 17:30 to Tuesday 11:00. Emerald was clear, calm, with light overflow.
15927 31 Aug 2020 @ 2010 --- cb Emerald is overflowing, calm, clear & Emerald green in color. no change.
14534 04 Jun 2020 @ 1138 --- cb calm and in good overflow. The dead tree that used to lean over the extended boardwalk on the south end fell over last night and missed Emerald by "that much".
14510 02 Jun 2020 @ 1840 --- cb ES is clear, calm and emerald in color. pool is high with great overflow
19300 01 Jun 2020 @ 0000 --- research-mab June 1 2020 - 0900 EMERALD SPRING Reminder to future researchers – regular Emerald Spring and Cistern Spring Notes are found under Steamboat Geyser
14116 10 Feb 2020 @ 1247 --- Micah Kipple Clear, and overflowing. Very Light, but noticeable convection/upwelling on near side. Only visible in right light.
14106 31 Jan 2020 @ 0951 --- Micah Kipple Clear, calm, and overflowing
13996 01 Nov 2019 @ 1712 --- MAB calm clear w slight overflow in left channel mixing w runoff from the 2018 south spouter. Right side channel filled w snow
13975 25 Oct 2019 @ 1817 --- MAB Beautiful and Calm w slight overflow down left channel
13959 18 Oct 2019 @ 1745 --- MAB calm- slight overflow in left channel
13921 11 Oct 2019 @ 1248 --- underarockphoto Not in overflow. Just at the cusp. Crystal clear blue.
13912 10 Oct 2019 @ 1528 --- underarockphoto Clear and in overflow
13744 18 Sep 2019 @ 1756 --- cb clear calm and in overflow
13725 17 Sep 2019 @ 0800 --- bbev In overflow, clear and calm
13716 16 Sep 2019 @ 1215 --- Polly Emerald is very clear and full. No bubblers nor steam seen in any If the vents around the perimeter.
13702 15 Sep 2019 @ 1738 --- cb in overflow
13683 13 Sep 2019 @ 1600 --- cb pool is just below overflow. Feature to the east in the trees is putting out alot of water into ES runoff channel. ES pool is calm, blue green, and steamy
13617 07 Sep 2019 @ 1309 --- Polly Emerald looks clear & calm. It is overflowing.
13601 02 Sep 2019 @ 1600 --- Polly Emerald’s pool has pulled back. I could not see any runoff. There may have been a tiny boil. Feature to the left is overflowing. Emerald is very clear.
13499 01 Sep 2019 @ 2000 --- Janet Jones Below overflow. Looking at photos, it was in overflow at 1315.
13405 25 Aug 2019 @ 1740 --- WillBoekel clear, calm, and overflowing.
13372 24 Aug 2019 @ 0727 --- cb pool is low and not in overflow. Feature in the 3 fallen trees to the NE is pumping a lot of water into ES runoff channel. Booping to 3".
13825 16 Aug 2019 @ 2100 --- Ben VL Clear and calm. Blue/green color deeper down. Info sign had fallen off. Propped it up against the railing.
13289 16 Aug 2019 @ 1803 --- cb pool is BARELY in overflow. it's clear, blue green in color. Last years feature in the east trees (3 trees spring?) is really pushing out a lot of water into Emeralds runoff channel.
13218 13 Aug 2019 @ 1646 --- cb clear, calm, no bubbles, blue green in color & just BARELY in overflow. Little feature in the base of the 3 dead trees from last year is erupting to 3" with heavy outflow into Emeralds runoff channel.
13157 11 Aug 2019 @ 0745 --- RMichaels Lightly overflowing, calm, and fairly clear.
13135 09 Aug 2019 @ 1514 --- cb pool is coming up. close to overflow. no more bubbles, clear and green again.
13119 09 Aug 2019 @ 0749 --- bbev Almost to overflow, clear, occasional bubbles.
13117 08 Aug 2019 @ 1732 --- bbev ~1" below overflow.
13104 08 Aug 2019 @ 0741 --- bbev Still below overflow but has come up some. few bubbles.
13095 07 Aug 2019 @ 1723 --- cb more clarity in the whole pool. still down 3 - 4" from overflow. A few areas with random bubbles breaking the surface. Last years thing on the SE shoulder in the trees is erupting/pulsing to ~3".
13084 07 Aug 2019 @ 0727 --- bbev Still 3-4" below overflow, cloudy, few if any bubbles, but very steamy and hard to see pool.
13074 06 Aug 2019 @ 1705 --- cb fewer bubbles and the pool is still very low. ( ~4" below overflow) it is greenish along the edges but mostly a milky turquoise blue.
13062 06 Aug 2019 @ 0740 --- bbev Still 3-4" below overflow. A few less bubbles.
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