Last Known Eruption
23y 86d 6h 3m ago

Latest Eruptions

Eruption DurationInterval
14 Jul 1999 @ 0030 A1y 340d 9h 46m
07 Aug 1997 @ 144460-90s22y 15d 19h 4m
28 Jul 1975 @ 19405m
28 Jul 1975 @ 1935

Interval Statistics

Interval Count3
Min5m
Max22y 15d 19h 4m
Mean7y 362d 1h 38m
Median1y 340d 9h 46m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
22466 10 Jul 2022 @ 1444 --- User34 At overflow and convecting over vent
21951 12 Jun 2022 @ 1506 --- Graham Below overflow.
21923 11 Jun 2022 @ 1347 --- Graham Below overflow.
21919 11 Jun 2022 @ 1043 --- Graham Calm and overflowing.
21906 10 Jun 2022 @ 2111 --- Forestbewithyou In high overflow
21887 10 Jun 2022 @ 1033 --- RMichaels In overflow with light convection over the vent.
21870 09 Jun 2022 @ 1314 --- Forestbewithyou In overflow and calm
21860 09 Jun 2022 @ 0908 --- aferrara weak to moderate overflow in south channel only
21838 08 Jun 2022 @ 1712 --- Graham At high overflow and calm.
21830 08 Jun 2022 @ 1222 --- SantaFe108 Barely below overflow and calm.
21825 08 Jun 2022 @ 0939 --- SantaFe108 Calm with with good overflow.
21816 07 Jun 2022 @ 1818 --- SantaFe108 In overflow and calm.
21773 06 Jun 2022 @ 1024 --- Graham In high overflow and calm.
21749 05 Jun 2022 @ 1400 --- SantaFe108 Pool is calm with overflow.
21735 05 Jun 2022 @ 0802 --- Graham Calm and overflowing.
21724 04 Jun 2022 @ 1521 --- Graham Below overflow near the white ring. Calm.
21718 04 Jun 2022 @ 1027 --- Graham Below overflow, but close to it.
21715 04 Jun 2022 @ 0823 --- Stephen_Gemar Pool beginning to drop. Still overflowing from its established channels.
21713 04 Jun 2022 @ 0806 04 Jun 2022 @ 0815 Stephen_Gemar Full and overflowing out of all of its runoff channels with convection over the vent. There is a slight trickle of runoff flowing out towards the boardwalk, right behind the Economic Geyser sign. Did not drop before I left.
21669 02 Jun 2022 @ 1421 --- Graham Down below overflow again and calm.
21666 02 Jun 2022 @ 1219 --- Graham Up to barely overflowing.
21665 02 Jun 2022 @ 1136 --- Graham Calm and below overflow.
21656 02 Jun 2022 @ 1037 --- Stephen_Gemar In overflow.
21651 02 Jun 2022 @ 0815 --- aferrara 0815: Overflow to south runoff channel, just below west runoff channel. 0819: Water circulating above vent, and slowly dropping. 0825: Water level rising.
21627 01 Jun 2022 @ 0755 --- Graham Calm and overflowing.
21598 31 May 2022 @ 1305 --- Stephen_Gemar In overflow.
21596 31 May 2022 @ 1125 --- Graham Calm and in high overflow.
21579 30 May 2022 @ 0722 --- Graham In calm overflow. Same 0937
21575 29 May 2022 @ 1520 --- Graham Just dropped below overflow and still bubbling. 1635 rising slowly and no longer bubbling. 1727 still rising and calm, close to overflow. 1745 in light overflow. Below overflow ~2h15m. Up in high overflow now and calm 1915.
21574 29 May 2022 @ 1456 --- Graham Full and bubbling over the vent pushing out waves.
21570 29 May 2022 @ 1226 --- Stephen_Gemar Below overflow.
21566 29 May 2022 @ 0959 --- Graham Below overflow
21554 28 May 2022 @ 1404 --- Graham In overflow.
21548 28 May 2022 @ 1038 --- Graham Below overflow
21539 27 May 2022 @ 1815 --- Graham Down below overflow.
21525 27 May 2022 @ 0941 --- Graham Full and overflowing.
21523 27 May 2022 @ 0700 --- Graham Dropped below overflow and exposed some of the bacteria mat below the rim.
21511 26 May 2022 @ 1029 --- TSBryan fairly strong overflow, convection visible above vent
21161 04 May 2022 @ 0910 --- RMichaels Light overflow to the south and faint convection over the vent.
21155 02 May 2022 @ 1627 --- RMichaels Below overflow with occasional bubbles breaking the surface.
21121 28 Apr 2022 @ 0910 --- aferrara Very hot with overflow toward Grand, and light trickle of water toward boardwalk. Thin flakes of white geyserite up to 3" long scattered, surrounding vent.
20968 09 Apr 2022 @ 1440 --- mhreed Mats are pinkish gray in color. Steady stream of small gas bubbles rising from vent (water appears greenish blue there).
20882 11 Mar 2022 @ 0910 --- aferrara 162F, in slight but steady overflow. Two runoff channels being excised down. Both were shallow but visible last week, not present in my pictures from February 18.
20879 08 Mar 2022 @ 0847 --- nomadruss Growing ever more colorful edges, occasional pulsing in the pool.
20870 05 Mar 2022 @ 0859 --- aferrara In bare overflow
20867 04 Mar 2022 @ 0905 --- aferrara 161F surface temps, bits of loose dead bacterial mat circulating in pool. Pale orange around vent, with white marks where mats are peeling off
20851 26 Feb 2022 @ 0950 --- aferrara Bright orange and steaming. Vent white. Surface temps topped out at 157.4°F
20829 18 Feb 2022 @ 0943 --- aferrara Steaming, Bright orange bacterial mats, crystal clear water. Vent white with scraps of dead bacterial mat circulating. Water above the level of its bacterial mats with melted ice showing possible very brief overflow.
16478 28 Oct 2020 @ 1355 --- Janet Jones Very low water level and full of brown microbes.Same with East Economic.
12381 06 Jul 2019 @ 1025 --- steve Economic is clearly not as hot. The cyanobacteria is growing lightly right up to the vent
11813 15 Jun 2019 @ 1750 --- ldgordon Below overflow
11295 11 May 2019 @ 1710 --- Siegmund ~2cm below overflow
11294 11 May 2019 @ 1605 --- Siegmund Strong overflow towards Grand. Key Spring area drowned.
11097 27 Apr 2019 @ 0837 --- Micah Kipple Still hot, convecting, and intermittently overflowing.
10191 14 Sep 2018 @ 0840 --- Micah Kipple In heavy ovf with convection over the vent.
9826 22 Aug 2018 @ 1451 --- Janet Jones Overflowing and convectionover the vent.
9451 03 Aug 2018 @ 2002 --- Tara Overflowing nicely but no convection over the vent.
9410 02 Aug 2018 @ 0811 --- JSJ In gentle overflow.
8842 22 Jun 2018 @ 1350 --- Janet Jones In overflow with good convection over the vent.
8379 31 May 2018 @ 2020 --- Stephen_Gemar Overflowing heavily, more so than my previous observations.
8351 30 May 2018 @ 1042 30 May 2018 @ 1052 Stephen_Gemar Economic continues to intermittently overflow, with heat rising from the vent.
8317 28 May 2018 @ 0945 28 May 2018 @ 1005 Stephen_Gemar Economic had 2-3 cycles of intermittent overflow during observation period, and had heat rising from the vent, enough to create a little convection.
8272 22 May 2018 @ 1919 22 May 2018 @ 1949 Tara At 1919 water level was so low that it was not covering the bacteria on the north side of the crater. At 1947, it was overflowing heavily. At 1949, it returned to the lower water level.
8039 28 Apr 2018 @ 1734 --- Micah Kipple Economic is intermittent on periods of likely more than an hour, but high points include convection and some ebullition above the vent.
8022 28 Apr 2018 @ 0621 --- Micah Kipple Vent white hot with noticeable convection. Outer North pool edge orange for a width of 20-40 cm, discharge has cut two new channels to the south but these have been here since when I first saw it on Friday.
4036 03 May 2017 @ 1702 --- mhreed Killed and lifted some of its bacteria mat; center of vent is blue/green.
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Baseline does not exist.