Last Known Eruption
11d 47m ago

Latest Eruptions

Eruption DurationInterval
09 Oct 2021 @ 222357m
09 Oct 2021 @ 21261h 1m
09 Oct 2021 @ 202549m
09 Oct 2021 @ 19361d 3h 4m
08 Oct 2021 @ 16321h 56m
08 Oct 2021 @ 143636m
08 Oct 2021 @ 140023h 38m
07 Oct 2021 @ 142226m
07 Oct 2021 @ 13566d 2h 40m
01 Oct 2021 @ 11161h 4m
01 Oct 2021 @ 101241m
01 Oct 2021 @ 093125m
01 Oct 2021 @ 090635m
01 Oct 2021 @ 083136m
01 Oct 2021 @ 0755 ie18h 56m
30 Sep 2021 @ 125945m
30 Sep 2021 @ 121420m 1h 40m
30 Sep 2021 @ 103449m
30 Sep 2021 @ 094551m
30 Sep 2021 @ 085417m
30 Sep 2021 @ 083725m
30 Sep 2021 @ 081220m 1h 3m
30 Sep 2021 @ 070941m 11h 41m
29 Sep 2021 @ 192841m
29 Sep 2021 @ 184726m 38m
29 Sep 2021 @ 180927m 40m
29 Sep 2021 @ 172916m 27m
29 Sep 2021 @ 170217m 37m
29 Sep 2021 @ 162524m
29 Sep 2021 @ 160140m
29 Sep 2021 @ 152135m
29 Sep 2021 @ 144655m
29 Sep 2021 @ 135147m
29 Sep 2021 @ 130441m
29 Sep 2021 @ 122352m
29 Sep 2021 @ 113136m
29 Sep 2021 @ 105544m
29 Sep 2021 @ 101123m 55m
29 Sep 2021 @ 091632m 49m
29 Sep 2021 @ 082727m 43m
29 Sep 2021 @ 074417m 31m
29 Sep 2021 @ 071318m 22m
29 Sep 2021 @ 0651 ie12h 13m
28 Sep 2021 @ 183842m 36m
28 Sep 2021 @ 180226m 1h 2m
28 Sep 2021 @ 170035m 19m
28 Sep 2021 @ 164111m 57m
28 Sep 2021 @ 154432m 39m
28 Sep 2021 @ 150519m 33m
28 Sep 2021 @ 143217m 28m
28 Sep 2021 @ 140414m 43m
28 Sep 2021 @ 132122m 37m
28 Sep 2021 @ 124419m 50m
28 Sep 2021 @ 115427m 44m
28 Sep 2021 @ 1110 A30m
28 Sep 2021 @ 104030m
28 Sep 2021 @ 101015m 28m
28 Sep 2021 @ 094218m 34m
28 Sep 2021 @ 090820m 38m
28 Sep 2021 @ 083052m
28 Sep 2021 @ 073829m 43m
28 Sep 2021 @ 065520m 9h 18m
27 Sep 2021 @ 213759m
27 Sep 2021 @ 203845m
27 Sep 2021 @ 195331m
27 Sep 2021 @ 192244m
27 Sep 2021 @ 183852m
27 Sep 2021 @ 174640m
27 Sep 2021 @ 170646m
27 Sep 2021 @ 162042m
27 Sep 2021 @ 153849m
27 Sep 2021 @ 144948m
27 Sep 2021 @ 140155m
27 Sep 2021 @ 13061h 15m
27 Sep 2021 @ 11511h 2m
27 Sep 2021 @ 104951m
27 Sep 2021 @ 095825m
27 Sep 2021 @ 093337m
27 Sep 2021 @ 085632m
27 Sep 2021 @ 082434m
27 Sep 2021 @ 075038m
27 Sep 2021 @ 071212m
27 Sep 2021 @ 0700 ie10h 40m
26 Sep 2021 @ 202026m
26 Sep 2021 @ 195432m
26 Sep 2021 @ 192228m
26 Sep 2021 @ 185429m
26 Sep 2021 @ 182527m
26 Sep 2021 @ 175843m
26 Sep 2021 @ 171547m
26 Sep 2021 @ 162825m
26 Sep 2021 @ 160335m
26 Sep 2021 @ 152849m
26 Sep 2021 @ 143941m
26 Sep 2021 @ 13584h 56m
26 Sep 2021 @ 090228m 29m
26 Sep 2021 @ 083334m
26 Sep 2021 @ 075922m 54m
26 Sep 2021 @ 070515m
26 Sep 2021 @ 0650 A11h 22m

Interval Statistics

Interval Count100
Min12m
Max6d 2h 40m
Mean3h 23m
Median41m

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.