Last Known Eruption
1d 20h 41m ago

Latest Eruptions

Eruption DurationInterval
18 Sep 2021 @ 1212 maj37m
18 Sep 2021 @ 113518m 22m
18 Sep 2021 @ 111314m 27m
18 Sep 2021 @ 104617m 40m
18 Sep 2021 @ 100639m
18 Sep 2021 @ 092723m 46m
18 Sep 2021 @ 084120m 15m
18 Sep 2021 @ 082610m 24m
18 Sep 2021 @ 080218m 1h 10m
18 Sep 2021 @ 0652 A~41m 14h 4m
17 Sep 2021 @ 164825m
17 Sep 2021 @ 16231h 21m
17 Sep 2021 @ 150251m
17 Sep 2021 @ 141146m
17 Sep 2021 @ 13251h 34m
17 Sep 2021 @ 115146m
17 Sep 2021 @ 110543m
17 Sep 2021 @ 102227m
17 Sep 2021 @ 095542m
17 Sep 2021 @ 091341m
17 Sep 2021 @ 083241m
17 Sep 2021 @ 075124m
17 Sep 2021 @ 072718m 35m
17 Sep 2021 @ 0652 ie21h 47m
16 Sep 2021 @ 090519m
16 Sep 2021 @ 084620m
16 Sep 2021 @ 082630m
16 Sep 2021 @ 075629m
16 Sep 2021 @ 072730m
16 Sep 2021 @ 0657 ie2d 21h 2m
13 Sep 2021 @ 09552d 20h 43m
10 Sep 2021 @ 131226m
10 Sep 2021 @ 124619m 19m
10 Sep 2021 @ 1227 ?3m 47m
10 Sep 2021 @ 114034m 51m
10 Sep 2021 @ 104921m 5m
10 Sep 2021 @ 1044 ie2h 38m
10 Sep 2021 @ 080613m 18m
10 Sep 2021 @ 074814m 2d 16h 21m
07 Sep 2021 @ 1527 maj17m
07 Sep 2021 @ 15101h 0m
07 Sep 2021 @ 14109m
07 Sep 2021 @ 14012m 53m
07 Sep 2021 @ 130832m 1h 36m
07 Sep 2021 @ 113252m
07 Sep 2021 @ 104029m 57m
07 Sep 2021 @ 094330m 18m
07 Sep 2021 @ 092515m 52m
07 Sep 2021 @ 0833~31m 48m
07 Sep 2021 @ 074533m 21m
07 Sep 2021 @ 0724 ?5m 29m
07 Sep 2021 @ 0655~22m 22h 31m
06 Sep 2021 @ 082443m
06 Sep 2021 @ 074126m 25m
06 Sep 2021 @ 0716 ie13h 57m
05 Sep 2021 @ 171935m
05 Sep 2021 @ 164432m
05 Sep 2021 @ 16121h 0m
05 Sep 2021 @ 15125h 9m
05 Sep 2021 @ 100346m
05 Sep 2021 @ 09171h 9m
05 Sep 2021 @ 0808 ie5d 19h 11m
30 Aug 2021 @ 12573d 2h 38m
27 Aug 2021 @ 10191h 56m
27 Aug 2021 @ 082327m
27 Aug 2021 @ 075649m
27 Aug 2021 @ 070716h 5m
26 Aug 2021 @ 15021h 16m
26 Aug 2021 @ 13463d 2h 32m
23 Aug 2021 @ 11141h 1m
23 Aug 2021 @ 10131h 47m
23 Aug 2021 @ 08261h 21m
23 Aug 2021 @ 070514h 24m
22 Aug 2021 @ 16415h 52m
22 Aug 2021 @ 1049 A40m
22 Aug 2021 @ 10093h 7m
22 Aug 2021 @ 070215h 19m
21 Aug 2021 @ 154348m
21 Aug 2021 @ 14551h 31m
21 Aug 2021 @ 13242h 18m
21 Aug 2021 @ 1106 ns59m
21 Aug 2021 @ 10071h 39m
21 Aug 2021 @ 08281h 14m
21 Aug 2021 @ 071411h 51m
20 Aug 2021 @ 192355m
20 Aug 2021 @ 182811h 22m
20 Aug 2021 @ 07062d 20h 37m
17 Aug 2021 @ 10293h 3m
17 Aug 2021 @ 07261h 26m
17 Aug 2021 @ 060015h 48m
16 Aug 2021 @ 14121h 7m
16 Aug 2021 @ 13055h 28m
16 Aug 2021 @ 073737m
16 Aug 2021 @ 070027m
16 Aug 2021 @ 063327m
16 Aug 2021 @ 060619h 43m
15 Aug 2021 @ 102328m 20m
15 Aug 2021 @ 100310m 29m
15 Aug 2021 @ 093445m
15 Aug 2021 @ 084929m 16h 30m

Interval Statistics

Interval Count100
Min5m
Max5d 19h 11m
Mean8h 21m
Median51m

Latest Notes

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