Last Known Eruption
170d 10h 21m ago

Latest Eruptions

Eruption DurationInterval
10 Oct 2022 @ 1924<26m 11d 5h 5m
29 Sep 2022 @ 141923h 35m
28 Sep 2022 @ 1444 ie1d 22h 23m
26 Sep 2022 @ 16215d 3h 4m
21 Sep 2022 @ 13171d 1h 19m
20 Sep 2022 @ 1158 ie1d 3h 2m
19 Sep 2022 @ 0856<4m 14h 49m
18 Sep 2022 @ 1807 ie9d 1h 33m
09 Sep 2022 @ 1634<9m 1d 23h 40m
07 Sep 2022 @ 1654 ns8h 30m
07 Sep 2022 @ 082412m 6d 23m
01 Sep 2022 @ 080116h 23m
31 Aug 2022 @ 1538 ie7h 52m
31 Aug 2022 @ 0746 ie14h 40m
30 Aug 2022 @ 1706 ie1d 6h 7m
29 Aug 2022 @ 105926d 21h 22m
02 Aug 2022 @ 13375m 15h 3m
01 Aug 2022 @ 2234~27m 1d 40m
31 Jul 2022 @ 2154 ie8h 33m
31 Jul 2022 @ 13214m 7h 24m
31 Jul 2022 @ 05575m 11h 24m
30 Jul 2022 @ 1833 ie5h 42m
30 Jul 2022 @ 1251 ie16h 17m
29 Jul 2022 @ 20344h 46m
29 Jul 2022 @ 15483h 43m
29 Jul 2022 @ 12054h 26m
29 Jul 2022 @ 07395m 11h 54m
28 Jul 2022 @ 194523h 2m
27 Jul 2022 @ 2043 ie1d 6h 2m
26 Jul 2022 @ 144120h 6m
25 Jul 2022 @ 183538m 6h 52m
25 Jul 2022 @ 11437m 2h 52m
25 Jul 2022 @ 085127m 2h 39m
25 Jul 2022 @ 061229m 1d 12h 38m
23 Jul 2022 @ 1734:0026m 47s 6h 47m
23 Jul 2022 @ 104712m 23h 31m
22 Jul 2022 @ 111617h 17m
21 Jul 2022 @ 175926m 3s 2h 19m
21 Jul 2022 @ 154025m 1d 1h 14m
20 Jul 2022 @ 14265h 20m
20 Jul 2022 @ 090632m 2h 47m
20 Jul 2022 @ 061929m 14h 58m
19 Jul 2022 @ 152126m 2h 46m
19 Jul 2022 @ 123522mim21h 40m
18 Jul 2022 @ 145529m 2h 55m
18 Jul 2022 @ 120030m 1d 14h 47m
16 Jul 2022 @ 2112:528h 50m
16 Jul 2022 @ 122210m 6h 8m
16 Jul 2022 @ 06145m 21h 6m
15 Jul 2022 @ 09084h 12m
15 Jul 2022 @ 0455:122h 53m
15 Jul 2022 @ 0202 ie20m 9h 24m
14 Jul 2022 @ 163829m 8h 21m
14 Jul 2022 @ 081731m 2h 34m
14 Jul 2022 @ 054324m 15h 20m
13 Jul 2022 @ 142335m 8h 53m
13 Jul 2022 @ 053032m 2d 11h 49m
10 Jul 2022 @ 17417h 22m
10 Jul 2022 @ 10191d 1h 48m
09 Jul 2022 @ 083141m 20h 10m
08 Jul 2022 @ 12214m 16h 20m
07 Jul 2022 @ 200112m 23h 20m
06 Jul 2022 @ 2041 ns4d 21h 5m
01 Jul 2022 @ 233617h 50m
01 Jul 2022 @ 0546very brief2d 20h 33m
28 Jun 2022 @ 0913 ie1d 21h 14m
26 Jun 2022 @ 1159brief22h 12m
25 Jun 2022 @ 13474m 1d 15h 34m
23 Jun 2022 @ 221329d 9h 55m
25 May 2022 @ 1218 ie128d 11h 18m
17 Jan 2022 @ 0000 A62d 7h 54m
15 Nov 2021 @ 160617d 6h 25m
29 Oct 2021 @ 1041 ie1d 20h 57m
27 Oct 2021 @ 1344 ie3d 4h 27m
24 Oct 2021 @ 091712d 19h 6m
11 Oct 2021 @ 14113d 20h 30m
07 Oct 2021 @ 17416h 36m
07 Oct 2021 @ 110520h 10m
06 Oct 2021 @ 1455 ns6d 27m
30 Sep 2021 @ 14286m 21h 3m
29 Sep 2021 @ 17251d 9h 38m
28 Sep 2021 @ 0747 ie1d 18h 20m
26 Sep 2021 @ 1327<13m 1d 2h 56m
25 Sep 2021 @ 1031 ie1d 17h 9m
23 Sep 2021 @ 17227h 43m
23 Sep 2021 @ 0939 ie1d 2h 12m
22 Sep 2021 @ 0727 ie19h 32m
21 Sep 2021 @ 1155 ie2d 22h 12m
18 Sep 2021 @ 1343 ie17h 49m
17 Sep 2021 @ 1954 ie1d 4h 6m
16 Sep 2021 @ 1548 ie6h 7m
16 Sep 2021 @ 0941 ie1d 14h 37m
14 Sep 2021 @ 1904 ie5h 39m
14 Sep 2021 @ 132512h 56m
14 Sep 2021 @ 0029 ie5h 59m
13 Sep 2021 @ 18301d 31m
12 Sep 2021 @ 17591d 2h 40m
11 Sep 2021 @ 1519 ie wc19h 5m
10 Sep 2021 @ 20146h 26m
10 Sep 2021 @ 13481d 1h 2m

Interval Statistics

Interval Count100
Min2h 19m
Max128d 11h 18m
Mean3d 23h 6m
Median20h 10m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
24817 01 Jan 2023 @ 1347 --- mhreed Overflow in progress. Dropped 1351.
24579 30 Oct 2022 @ 1730 --- SantaFe108 Overflowing heavily since Grand erupted.
24561 30 Oct 2022 @ 1624 30 Oct 2022 @ 1700 SantaFe108 Cycling between overflowing and not overflowing every ~5 minutes.
23529 01 Sep 2022 @ 1533 --- DinosaursArentReal big drop at 1533 with no sputnik D fill
23528 01 Sep 2022 @ 1509 --- DinosaursArentReal abrupt drop in WT level with no corresponding sputnik fill
23468 28 Aug 2022 @ 1833 --- annelies8 Overflowing more than I've ever seen, for all of Grand's eruption and continued after Update: draining at 18:37
23366 23 Aug 2022 @ 1511 --- S.Glasser overflowing, good thumps, about ~1min of blurps, minimal burst action.
22995 02 Aug 2022 @ 1426 --- Ben VL A second eruption began following Grand. D=5m. Putting in as a note because both of Jim's posts merged.
22993 02 Aug 2022 @ 1342 --- JimS Ended
22188 28 Jun 2022 @ 2213 --- K.Cooper thumping and small splash, no eruption
21378 20 May 2022 @ 0845 --- Graham Just below overflow. 0908 recently went into overflow. 0926 below overflow.
21229 10 May 2022 @ 2036 --- Ajw pool is full with strong overflow, but no eruptions.
21224 09 May 2022 @ 1705 --- Ajw Pool full, but no eruption, light overflow.
20937 02 Apr 2022 @ 1005 --- Mkeller Slimy and orange. About a foot below overflow but looks like it is cycling up and down.
20676 12 Jan 2022 @ 0753 --- Graham Had come up to overflow.
20670 11 Jan 2022 @ 1408 --- Graham In overflow.
19516 12 Sep 2021 @ 1828 --- Suzanne eruption ended
19123 28 Aug 2021 @ 0707 --- JimS Ended during Grand eruption.
19072 26 Aug 2021 @ 1038 --- Graham Off between 1036 and 1038. No Rift.
18063 23 Jun 2021 @ 1508 23 Jun 2021 @ 1511 ldgordon Thumping with small slashing at 1509
17408 03 Jun 2021 @ 1544 --- steve West Triplet went into overflow with gentle convection over the vent but no eruption yet.
17309 31 May 2021 @ 1525 --- Bhoffer In heavy overflow.
17036 09 May 2021 @ 1814 --- Ajw Strong thumping and water surges with each thump
16004 06 Sep 2020 @ 1818 --- Graham In overflow but not erupting.
15418 06 Aug 2020 @ 1617 06 Aug 2020 @ 1714 JSJ Water level rising, then falling at 1617 to 1618. Ditto at 1622 to 1623 & 1640 to 1641 & 1649 to 1650 & 1711 to 1714. Delta Geyser erupts in response to West Triplet water level rises.
14182 12 Apr 2020 @ 1200 08 May 2020 @ 1850 mhvogel Currently in overflow. It has lost its deep blue color and has cooled. It now has light brown Cyanobacteria lining the walls. I haven’t witnessed any eruptions since January.
13782 22 Sep 2019 @ 2003 22 Sep 2019 @ 2005 William overflowed and dropped to 1/2 crater
12902 31 Jul 2019 @ 1715 31 Jul 2019 @ 1816 rbwhitaker Have not observed any water in West Triplet while waiting for Grand. Most eruptions this year have come with water in West Triplet.
12562 22 Jul 2019 @ 2233 --- William overflowed but did not erupt. Sputnik bubbling in unison with start of overflow but did not stay in eruption.
11301 12 May 2019 @ 2006 --- Siegmund In overflow 2000. Thumps 2006 to 2011, no eruption.
11300 12 May 2019 @ 1509 --- Siegmund Overlow 1429-1435, 1441, 1500. Thumps 1509, small splashes 1512 to 1514, drop 1514. No full eruption.
11299 11 May 2019 @ 2328 --- Siegmund Thumps 2328-2332. No eruption.
11298 11 May 2019 @ 1718 11 May 2019 @ 1756 Siegmund In overflow 1718, dropped 1719. In overflow again 1725. -3cm at 1731. Started overflow at 1734, dropped 1739. Resumed overflow 1744. Thumped 1750 to 1755, dropped 1756.
11198 10 May 2019 @ 0932 --- udo Overflow went from light to heavy following Grand.
11153 03 May 2019 @ 1334 --- Tara Overflowing, tea colored water
11094 27 Apr 2019 @ 0813 --- Micah Kipple Orangy brown. May be in spring sleep mode
10997 19 Apr 2019 @ 1548 --- udo Started overflowing sometime during or after Grand eruption. Tea colored (springtime) colored water.
10706 03 Nov 2018 @ 1150 --- udo Overflowing strongly and clear.
10634 20 Oct 2018 @ 1257 20 Oct 2018 @ 1344 rbwhitaker In heavy overflow and has been for several minutes since I showed up. Some convection over the vent. By 1302, it had dropped below overflow. Back in light overflow at 1306. Back below overflow at 1312. Overflow again at 1317. Still in light overflow since grand started at 1319. Runoff is heavy again at 1327. Never stopped overflowing when it got weaker. Middle of pool is surging up and down at 1329. Bubbling as well. It seemed to be slowly building as grand was erupting. Grand has now stopped. Still pulsing and gently boiling with good overflow at 1336. Pulsing and boiling rather suddenly stopped at 1338. Still in very light overflow at 1344.
9375 01 Aug 2018 @ 1927 --- JSJ Full pool & in moderately heavy overflow, with roiling. No roiling at 1929.
9084 09 Jul 2018 @ 1647 --- bhoppe Eruption done.
8084 06 May 2018 @ 0528 --- JimS Empty.
8046 29 Apr 2018 @ 2345 --- Micah Kipple Stuck in intermittent overflow.
8036 28 Apr 2018 @ 1213 --- udo Overflow restarted during latter part of Grand eruption.
8021 28 Apr 2018 @ 0617 --- Micah Kipple West triplet is drained and dry. Lightly steaming. This may be a result of the FIVE plus hour Rift Eruption that occurred last night that I haven't entered yet.
8018 27 Apr 2018 @ 1533 27 Apr 2018 @ 1538 billwarnock strong overflow of hot brownish water and bubbles
8003 26 Apr 2018 @ 0808 --- Micah Kipple Orangy brown and stuck in intermittent overflow
7943 15 Feb 2018 @ 1242 --- WillBoekel stuck in intermittent light overflow
7879 27 Jan 2018 @ 1400 --- Graham West Triplet was full of water, fluctuating in and out of overflow for a couple of hours and didn't erupt.
7793 28 Oct 2017 @ 1523 --- udo Overflowing.
7778 26 Oct 2017 @ 1430 --- udo Overflowing clear water intermittently. Mostly on with pauses.
7734 23 Oct 2017 @ 1330 --- udo Overflowing, not erupting. Stopped at 1332. Restarted approx 1338.
6366 14 Sep 2017 @ 0706 14 Sep 2017 @ 0727 JimS Just dropped below overflow as I arrived, then slowly refilled and started overflowing again at 0714. Dropped below overflow again by 0718. Resumed overflow at 0727.
4518 23 Jul 2017 @ 1450 --- sfavor off shortly after rift started
4037 03 May 2017 @ 1755 --- mhreed Entered strong overflow with Grand.
4032 03 May 2017 @ 0512 --- JimS Overflowing but not erupting at 0512.
4029 02 May 2017 @ 1100 --- JimS Overflowing but not erupting
3999 23 Apr 2017 @ 1010 --- Janet Jones Part full of 'green tea' colored water.
3983 21 Apr 2017 @ 1315 --- Micah Kipple Thumps with boiling
3468 11 Aug 2016 @ 1557 11 Aug 2016 @ 1626 JSJ Subterranean eruptive thumping and gurgling at 1557-onward, with steaming, but no visible water. Still going at 1603. Quiet/done at 1608 (coinciding with Vent & Turban & Percolator all finishing up). Renewed subterranean eruptive thumping and gurgling at 1611. Visible spray at 1613. Out-of-vent splashing (no visible pool) at 1614. Activity continuing to 1623. Getting quiet at 1625 to 1626.
2137 16 Aug 2015 @ 1418 16 Aug 2015 @ 1446 JSJ Low pool splashing at 1418-1419 & 1422-1423 & 1446. Pool's water level not visible from boardwalk.
1820 30 Jun 2015 @ 0957 --- WillBoekel had a false start 2 splash and then quit.
1814 28 Jun 2015 @ 2125 --- SteveO burst for 30 seconds and drain.
1055 27 Apr 2014 @ 0000 27 Apr 2014 @ 2359 udo runoff is hot and clear but water in vent is rust colored.
1799 26 Apr 2014 @ 1116 --- LynnS West Triplet was in overflow
1051 26 Apr 2014 @ 0635 --- WillBoekel Sitting at a full and slightly overflowing water level and has a small amount of bacteria growing in it at 0635
870 05 Sep 2013 @ 2214 --- Micah Kipple post eruptive at 2214
982 20 Jul 2008 @ 0913 --- BoekelUpload end 9:13 or 9:14
1415 07 May 2007 @ 1110 07 May 2007 @ 1120 BoekelUpload between 11:10 and 11:20
16751 17 Oct 1998 @ 1344 --- JarnoO surging and thumps
16749 16 Oct 1998 @ 0919 --- JarnoO thumps and surges
16743 09 Oct 1998 @ 1410 --- JarnoO thumps and surges
16727 24 Sep 1998 @ 1043 --- JarnoO thumps and surges
16724 23 Sep 1998 @ 0937 --- JarnoO overflow
16666 08 Jun 1998 @ 0000 08 Jun 1998 @ 2359 JarnoO variable trickle oflow to 2-3" below oflow
14420 27 Oct 1995 @ 1547 --- JarnoO just drained
14407 15 Oct 1995 @ 0715 --- JarnoO end ~0715
14363 23 Aug 1995 @ 0531 --- JarnoO inactive and drained at 0531
12705 03 Aug 1994 @ 0000 03 Aug 1994 @ 2359 JarnoO {mentioned but not time given}
12297 18 Aug 1993 @ 0555 --- JarnoO end ~0555
12218 06 Jun 1993 @ 2100 06 Jun 1993 @ 2159 JarnoO 21:xx; d=~34
5506 06 Aug 1992 @ 0000 06 Aug 1992 @ 2359 JarnoO before Rift
5225 23 May 1992 @ 0715 --- JarnoO marks replaced 0715
4923 21 Jan 1992 @ 0000 21 Jan 1992 @ 2359 JarnoO slight overflow; [no time given]
441 17 Jul 1975 @ 0000 17 Jul 1975 @ 2359 BoekelUpload after Grand erupted
EntrySourceLinkComment
03 Aug 2018 @ 1258 JSJ https://www.youtube.com/watch?v=O6KykW5TWQM#t=2m04s Clips 7 to 11 of this video compilation (time stamp 2:04 to the end) show West Triplet Geyser's 12:58 to 1:34 PM eruption on 3 August 2018.
03 Aug 2018 @ 0934 JSJ https://www.youtube.com/watch?v=O6KykW5TWQM Clips 1 to 6 of this video compilation (beginning to time stamp 2:03) show West Triplet Geyser's 9:34 to 9:40 AM eruption + overflow + post-eruption drain on 3 August 2018.
03 Aug 2018 @ 1258 JSJ https://www.flickr.com/photos/jsjgeology/29559486537 Photo (out of 13) of West Triplet Geyser's 12:58 to 1:34 PM eruption on 3 August 2018.
11 Aug 2016 @ 1432 JSJ https://www.flickr.com/photos/jsjgeology/30385878506 Thermal image (1 of 2) of West Triplet Geyser's 2:32 to 3:40 PM eruption on 11 August 2016.
11 Aug 2016 @ 1432 JSJ https://www.flickr.com/photos/jsjgeology/30385911576 Photo (1 of 4) of West Triplet Geyser's 2:32 to 3:40 PM eruption on 11 August 2016.
11 Aug 2016 @ 1432 JSJ https://www.youtube.com/watch?v=IKc1BTQ1iZo Time lapse video of West Triplet Geyser's 2:32 to 3:40 PM eruption on 11 August 2016.
Baseline does not exist.