Last Known Eruption
1d 21h 44m ago

Latest Eruptions

Eruption DurationInterval
31 Jul 2021 @ 103721m
31 Jul 2021 @ 101618m
31 Jul 2021 @ 09581h 55m
31 Jul 2021 @ 08033d 14h 11m
27 Jul 2021 @ 1752~50m 1h 8m
27 Jul 2021 @ 164434m 43m
27 Jul 2021 @ 160132m 4h 24m
27 Jul 2021 @ 11375h 14m
27 Jul 2021 @ 062322h 36m
26 Jul 2021 @ 07473d 14h 0m
22 Jul 2021 @ 17472h 50m
22 Jul 2021 @ 145750m
22 Jul 2021 @ 14071h 10m
22 Jul 2021 @ 125748m
22 Jul 2021 @ 12091h 39m
22 Jul 2021 @ 10303h 8m
22 Jul 2021 @ 07221h 16m
22 Jul 2021 @ 060620h 25m
21 Jul 2021 @ 094159m
21 Jul 2021 @ 08422h 24m
21 Jul 2021 @ 06184d 20h 20m
16 Jul 2021 @ 095844m 57m
16 Jul 2021 @ 090135m 1h 11m
16 Jul 2021 @ 0750 A~44m 1h 28m
16 Jul 2021 @ 062257m 26m
16 Jul 2021 @ 055636m
16 Jul 2021 @ 052030m 10h 54m
15 Jul 2021 @ 18261h 17m 1h 33m
15 Jul 2021 @ 165356m 46m
15 Jul 2021 @ 160732m 1h 28m
15 Jul 2021 @ 143951m 3h 40m
15 Jul 2021 @ 105954n4h 48m
15 Jul 2021 @ 061145m 38m
15 Jul 2021 @ 053334m 11h 49m
14 Jul 2021 @ 174415m 27m
14 Jul 2021 @ 171723m 3h 11m
14 Jul 2021 @ 140654m 46m
14 Jul 2021 @ 132023m 1h 40m
14 Jul 2021 @ 11401h 4m 1h 29m
14 Jul 2021 @ 101158m 1h 30m
14 Jul 2021 @ 084152m 1h 30m
14 Jul 2021 @ 071149m 55m
14 Jul 2021 @ 061628m 31m
14 Jul 2021 @ 0545 ie11h 48m
13 Jul 2021 @ 175751m 1h 52m
13 Jul 2021 @ 16051h 0m
13 Jul 2021 @ 150532m 1h 30m
13 Jul 2021 @ 133556m 1h 24m
13 Jul 2021 @ 121148m 52m
13 Jul 2021 @ 111932m 2d 23h 11m
10 Jul 2021 @ 120812m 11m
10 Jul 2021 @ 115737m
10 Jul 2021 @ 11202h 38m
10 Jul 2021 @ 084234m 1h 33m
10 Jul 2021 @ 070953m 12h 24m
09 Jul 2021 @ 184510h 47m
09 Jul 2021 @ 075822h 52m
08 Jul 2021 @ 090649m
08 Jul 2021 @ 08171h 38m
08 Jul 2021 @ 06399d 21h 22m
28 Jun 2021 @ 0917 ie22h 46m
27 Jun 2021 @ 10311h 19m
27 Jun 2021 @ 09122h 35m
27 Jun 2021 @ 06378h 41m
26 Jun 2021 @ 21562h 26m
26 Jun 2021 @ 19301h 15m
26 Jun 2021 @ 181512h 16m
26 Jun 2021 @ 055921h 8m
25 Jun 2021 @ 085151m
25 Jun 2021 @ 0800 ie1h 50m
25 Jun 2021 @ 06108h 46m
24 Jun 2021 @ 21241h 35m
24 Jun 2021 @ 194955m 3d 6h 23m
21 Jun 2021 @ 1326 ie1d 7h 44m
20 Jun 2021 @ 0542 ie22h 0m
19 Jun 2021 @ 07421h 42m
19 Jun 2021 @ 06009h 48m
18 Jun 2021 @ 20121h 20m
18 Jun 2021 @ 185251m
18 Jun 2021 @ 180126m 1h 28m
18 Jun 2021 @ 16333h 7m
18 Jun 2021 @ 13261h 43m
18 Jun 2021 @ 11431h 5m 1h 44m
18 Jun 2021 @ 09591h 6m 1h 32m
18 Jun 2021 @ 08271h 46m
18 Jun 2021 @ 064110h 46m
17 Jun 2021 @ 195557m
17 Jun 2021 @ 185850m 48m
17 Jun 2021 @ 1810 ie>22m 4h 11m
17 Jun 2021 @ 13591h 22m
17 Jun 2021 @ 1237 ie>44m 4h 17m
17 Jun 2021 @ 082036m 1h 30m
17 Jun 2021 @ 065050m 42m
17 Jun 2021 @ 060814h 48m
16 Jun 2021 @ 15201h 30m
16 Jun 2021 @ 13501h 35m
16 Jun 2021 @ 12151h 0m 2h 32m
16 Jun 2021 @ 094336m 1h 35m
16 Jun 2021 @ 08081h 21m
16 Jun 2021 @ 064713h 35m

Interval Statistics

Interval Count100
Min11m
Max9d 21h 22m
Mean10h 58m
Median1h 36m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.