Last Known Eruption
14h 2m ago

Latest Eruptions

Eruption DurationInterval
28 Jun 2022 @ 172734m 19h 54m
27 Jun 2022 @ 21333h 11m
27 Jun 2022 @ 182227m
27 Jun 2022 @ 17553h 17m
27 Jun 2022 @ 14381h 1m
27 Jun 2022 @ 1337 ns~29m 45m
27 Jun 2022 @ 125223m 46m
27 Jun 2022 @ 120657m
27 Jun 2022 @ 110928m 28m
27 Jun 2022 @ 104117m 1h 55m
27 Jun 2022 @ 08461h 1m
27 Jun 2022 @ 074550m
27 Jun 2022 @ 06559h 34m
26 Jun 2022 @ 212154m
26 Jun 2022 @ 2027 ns2h 49m
26 Jun 2022 @ 173857m
26 Jun 2022 @ 1641~26m 47m
26 Jun 2022 @ 155427m 7d 20h 15m
18 Jun 2022 @ 19391d 9h 59m
17 Jun 2022 @ 094042m 2d 12h 52m
14 Jun 2022 @ 204832m 9d 8h 44m
05 Jun 2022 @ 1204 ie57m
05 Jun 2022 @ 110757m
05 Jun 2022 @ 101016h 44m
04 Jun 2022 @ 17262h 18m
04 Jun 2022 @ 1508 ie45m
04 Jun 2022 @ 14231h 3m
04 Jun 2022 @ 13201h 1m
04 Jun 2022 @ 121941m 51m
04 Jun 2022 @ 112829m 39m
04 Jun 2022 @ 104918m 9m
04 Jun 2022 @ 10404m 23h 58m
03 Jun 2022 @ 104235m
03 Jun 2022 @ 100739m
03 Jun 2022 @ 09281h 5m
03 Jun 2022 @ 082349m
03 Jun 2022 @ 073441m
03 Jun 2022 @ 06539h 34m
02 Jun 2022 @ 211951m
02 Jun 2022 @ 202845m
02 Jun 2022 @ 19433h 26m
02 Jun 2022 @ 16174h 49m
02 Jun 2022 @ 112851m
02 Jun 2022 @ 103735m
02 Jun 2022 @ 100239m
02 Jun 2022 @ 092355m
02 Jun 2022 @ 08289m
02 Jun 2022 @ 081940m
02 Jun 2022 @ 073911h 41m
01 Jun 2022 @ 195816m 42m
01 Jun 2022 @ 191658m
01 Jun 2022 @ 181852m
01 Jun 2022 @ 172626m 18m
01 Jun 2022 @ 17081h 0m
01 Jun 2022 @ 16081h 1m
01 Jun 2022 @ 150749m
01 Jun 2022 @ 141828m 56m
01 Jun 2022 @ 132236m 38m
01 Jun 2022 @ 124425m 36m
01 Jun 2022 @ 120825m 49m
01 Jun 2022 @ 111923m 13h 59m
31 May 2022 @ 212035m
31 May 2022 @ 204514m 19m
31 May 2022 @ 202613m 29m
31 May 2022 @ 195718m 34m
31 May 2022 @ 192348m
31 May 2022 @ 183528m 55m
31 May 2022 @ 1740~32m 51m
31 May 2022 @ 164929m 54m
31 May 2022 @ 1555 ie>29m 19h 33m
30 May 2022 @ 202231m
30 May 2022 @ 195125m
30 May 2022 @ 192614m
30 May 2022 @ 19121h 51m
30 May 2022 @ 172145m
30 May 2022 @ 1636 A3h 36m
30 May 2022 @ 130033m
30 May 2022 @ 122721m 49m
30 May 2022 @ 113826m 39m
30 May 2022 @ 105930m 54m
30 May 2022 @ 1005 ie>27m 1d 15h 51m
28 May 2022 @ 18141h 3m
28 May 2022 @ 171136m 1d 6h 55m
27 May 2022 @ 101627m 41m
27 May 2022 @ 0935 ie10m
27 May 2022 @ 0925 ie<5m 30m
27 May 2022 @ 085522m 46m
27 May 2022 @ 080927m 19m
27 May 2022 @ 075017m
27 May 2022 @ 0733 ns13m 20m
27 May 2022 @ 0713 ie4d 11h 39m
22 May 2022 @ 19341h 23m
22 May 2022 @ 18116h 35m
22 May 2022 @ 113628m 2h 3m
22 May 2022 @ 09331h 9m 1h 11m
22 May 2022 @ 082234m 50m
22 May 2022 @ 073229m 1d 19h 41m
20 May 2022 @ 11511h 22m
20 May 2022 @ 102957m 1h 1m
20 May 2022 @ 092836m 1h 51m

Interval Statistics

Interval Count100
Min9m
Max9d 8h 44m
Mean9h 27m
Median54m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
19801 30 Sep 2021 @ 0832 --- Brian RV off now
18992 22 Aug 2021 @ 1258 22 Aug 2021 @ 1638 Polly Mostly quick cycles with little activity from Mortar vents. A often continued intermittently.
18584 22 Jul 2021 @ 1507 22 Jul 2021 @ 1713 Brian Cycle activity has been progressively less organized for the past two hours. We’ve had the semblance of two regular cycle starts, but each has degenerated into random splashing from Fan’s upper vents fairly quickly
17681 11 Jun 2021 @ 1614 11 Jun 2021 @ 1700 Polly 1614 RHGA ie, low levels. 1620 R off, AC (Angle continued), intermittent. 1624-1627 disorganized. AC 1628 R on then G & A. Low level cycle. R off 1651. 1657 R on & ANQ (Angle Never Quit).
13593 05 Sep 2019 @ 1605 05 Sep 2019 @ 1715 Polly R, H, A ie 1605. 1607 heavy MV steam, then lighter. 1615 heavy steam UM. 1620 R off, A Continued. 1622 copious MV steam, 25 UM audible steam. A off by 1630. Intermittent MV steam C. 1641 BV light spritz C, & tips of splashes visible LM, with improvement until R/H on 1651. A blips 1654 Continue & G on. H&G thick 1 - 2’ steady. H & G intermittent 1657, height decreasing. A on fully 1700. By 1704 occasional thin high spurts H&G. Left 1715. (BV channel damp ~2’ down.)
13594 05 Sep 2019 @ 1241 05 Sep 2019 @ 1328 Polly R off upon arrival, A & MV steam intermittent. 1249 A off. 1301 BV spritzing intermittently & improving. 1304 audible LM & UM. 1304 R/H , with A blips 1305. 1306 G on , H&G thick with some H spurts 2’. G&H thick at times. Subsided slowly & I left 1328.
12044 29 Jun 2019 @ 1552 29 Jun 2019 @ 1800 Polly On arrival, small puddle near Bottom Vent. Catch basins were dry. I watched portions of 3 mostly organized cycles, with intermittent moderate to heavy steam in Main Vent. Overall, water levels were moderate. Lower Mortar splashes were easily seen. Angle stayed on for a minute or 2 after River was off, then turned off. Cycle durations varied. There was a River Vent pause at 1618 (d=6m) but no splashing in Main Vent. (Some pushes of steam may have been from splashing at depth.) When River came back on, Angle started intermittent blipping right away on this cycle.
10037 04 Sep 2018 @ 0830 04 Sep 2018 @ 1952 c.barwin The first River to River began at 0904 and lasted 58 minutes. During this cycle, Angle did not turn off until 1 minute into the next River on which became an event cycle. The event cycle lasted 115 minutes, then the next cycle was 111 minutes, then 104, 119, and 116.
10017 03 Sep 2018 @ 0852 03 Sep 2018 @ 1826 c.barwin A day of 4 long cycles and one shortish one. In order of River on to River on starting at 0925... the first cycle was 80 minutes, then 94, 104, & 102. The one after the 102 was 61 minutes which was followed by a cycle with good water levels 35+ minutes after River on at 1732. Gold was on at 1734 and turned off at 1740 by forceful Main Vent steam. After copious MV steam with no water, Gold came back on two minutes later.. Throughout this cycle and the 61 minute one, MV steamed heavily.
9951 30 Aug 2018 @ 0830 30 Aug 2018 @ 1810 c.barwin I observed 5 normal cycles over a 9+ hour sit. The first cycle at 0845 was 112 minutes, then 71, 102, 104, & 93. Other than a couple of River coughs, the day was 'unEventful'.
9726 15 Aug 2018 @ 0824 15 Aug 2018 @ 1535 c.barwin observed 5 regular cycles during this time span.
9713 14 Aug 2018 @ 0825 14 Aug 2018 @ 1519 c.barwin observed 4 regular cycles during this time.
9689 12 Aug 2018 @ 1704 12 Aug 2018 @ 1931 minissa 2 regular cycles with High and Gold turning on not long after River and Angle within 2 minutes of that. Initial water levels pretty good. First cycle was 27 min, 2nd was 40 with some spritzing from Bottom and eventual steam put out by Frying Pan and I think Frying Pan 2 (small steam aperture inside back arm of Lower Mortar
7698 26 Sep 2017 @ 1226 26 Sep 2017 @ 1315 Polly River already off upon arrival. 1227-29 intermittent A splashes. Mortar mostly quiet 1226-1245. 1238 heavy MV steam. 1245 finally a few light fuzz balls BV and then at 48 some in LM. By 1256 thicker splashes BV & LM with MV huff. R on 1257, G 1258, A 1259. Thick water levels (H ~ 1') but bottoming out often.
7697 26 Sep 2017 @ 1043 26 Sep 2017 @ 1057 Polly 1043 BV light spritz; by 1049 BV spritz hitting top of rock. 10:49 R/H on; G on 1052. Pause 1053. 1054 R back on; G lightly on 1057.
6552 16 Sep 2017 @ 1329 16 Sep 2017 @ 1540 RLJones The series of very short cycles returned with 7 cycles ocurring during the 2h 11m of observation. Never was water viewed in MV nor was there any pooling or splashes in BV or LV. HV never exceeded 2 ft. AV was very frequent during entire observation. The short cycles were still in process when left.
6495 16 Sep 2017 @ 1057 16 Sep 2017 @ 1150 Polly Longer cycle with better water levels in Bottom Vent, High, & Gold.
7749 15 Sep 2017 @ 1610 15 Sep 2017 @ 1910 Tara Disorganized short garbage cycles with River off no longer than about 5 minutes at a time.
6360 13 Sep 2017 @ 1354 13 Sep 2017 @ 1409 Polly Last cycle River to River was 15 m. When River turned off at 1404, Angle actually stayed off.
6359 13 Sep 2017 @ 1135 13 Sep 2017 @ 1354 Polly Angle has played much of the day. Cycles have each been over an hour except the last one which was 45 minutes.
2865 21 May 2016 @ 0615 --- JimS Angle on 0631.
2849 15 May 2016 @ 0907 --- RLJones NO eruption yet. Having an organized cycle right now.
7800 06 Sep 2004 @ 1220 06 Sep 2004 @ 1306 Tara Disorganized garbage, Angle constant and River off for only 1-2 minutes at a time.
14319 05 Jun 1995 @ 1231 05 Jun 1995 @ 1243 JarnoO jetting from Angle Vent (weak) @ 1231; River Vent off 1239-1243
EntrySourceLinkComment
08 Aug 2017 @ 1830 JSJ https://www.youtube.com/watch?v=HuQxsKHf1rc#t=0m52s Time lapse video of 2 regular cycles of Fan & Mortar Geysers. The 6:30 to 7:43 PM regular cycle starts at time stamp 0:52 in the video.
08 Aug 2017 @ 1713 JSJ https://www.youtube.com/watch?v=HuQxsKHf1rc Time lapse video of 2 regular cycles of Fan & Mortar Geysers. The 5:13 to 6:05 PM regular cycle starts at time stamp 0:01 in the video.
Baseline does not exist.