Last Known Eruption
3h 19m ago

Latest Eruptions

Eruption DurationInterval
03 Aug 2021 @ 1748:004h 16m
03 Aug 2021 @ 13324h 35m
03 Aug 2021 @ 08572d 14h 32m
31 Jul 2021 @ 1825 maj6h 26m
31 Jul 2021 @ 11598h 21m
31 Jul 2021 @ 03389h 4m
30 Jul 2021 @ 18344h 4m
30 Jul 2021 @ 14302d 17h 55m
27 Jul 2021 @ 20356h 16m
27 Jul 2021 @ 14196h 58m
27 Jul 2021 @ 07217h 15m
27 Jul 2021 @ 00064h 10m
26 Jul 2021 @ 19564h 41m
26 Jul 2021 @ 1515 A2h 58m
26 Jul 2021 @ 12172h 22m
26 Jul 2021 @ 095515h 25m
25 Jul 2021 @ 1830 A5h 36m
25 Jul 2021 @ 12542d 6h 52m
23 Jul 2021 @ 060221h 35m
22 Jul 2021 @ 082710h 45m
21 Jul 2021 @ 21422h 41m
21 Jul 2021 @ 19012h 35m
21 Jul 2021 @ 16265h 27m
21 Jul 2021 @ 10592d 16h 8m
18 Jul 2021 @ 18512d 7h 31m
16 Jul 2021 @ 1120 maj22h 44m
15 Jul 2021 @ 12361h 24m 3h 1m
15 Jul 2021 @ 09351h 5m 1h 57m
15 Jul 2021 @ 07381h 20m 13h 5m
14 Jul 2021 @ 18332h 59m
14 Jul 2021 @ 15341h 22m 20h 17m
13 Jul 2021 @ 191712h 15m
13 Jul 2021 @ 0702 ie2d 18h 19m
10 Jul 2021 @ 1243 maj3h 11m
10 Jul 2021 @ 09321h 1m 3h 47m
10 Jul 2021 @ 0545 A10h 11m
09 Jul 2021 @ 19342h 7m
09 Jul 2021 @ 17271d 1h 58m
08 Jul 2021 @ 15293h 48m
08 Jul 2021 @ 114111d 19h 45m
26 Jun 2021 @ 15568h 49m
26 Jun 2021 @ 07071d 18h 29m
24 Jun 2021 @ 12384d 4h 43m
20 Jun 2021 @ 07552d 16h 19m
17 Jun 2021 @ 153631m
17 Jun 2021 @ 1505 min5h 38m
17 Jun 2021 @ 092716h 40m
16 Jun 2021 @ 16476h 12m
16 Jun 2021 @ 10351h 7m 20h 40m
15 Jun 2021 @ 13554h 21m
15 Jun 2021 @ 09342d 16h 31m
12 Jun 2021 @ 1703 maj1d 4h 20m
11 Jun 2021 @ 12435d 5h 28m
06 Jun 2021 @ 071520d 22h 40m
16 May 2021 @ 08351d 22h 38m
14 May 2021 @ 0957 ie22h 57m
13 May 2021 @ 110013d 16h 32m
29 Apr 2021 @ 18281d 6h 47m
28 Apr 2021 @ 11414d 21m
24 Apr 2021 @ 112019h 0m
23 Apr 2021 @ 162057m
23 Apr 2021 @ 15232h 41m
23 Apr 2021 @ 124222h 54m
22 Apr 2021 @ 13481d 3h 54m
21 Apr 2021 @ 0954184d 18h 41m
18 Oct 2020 @ 1513 ie11d 21h 29m
06 Oct 2020 @ 1744 ie6d 10h 29m
30 Sep 2020 @ 0715 ie10d 16h 56m
19 Sep 2020 @ 14192d 4h 24m
17 Sep 2020 @ 09553d 20h 43m
13 Sep 2020 @ 13122d 23h 33m
10 Sep 2020 @ 1339 ie3d 22h 58m
06 Sep 2020 @ 1441 ie2h 5m
06 Sep 2020 @ 12364h 21m
06 Sep 2020 @ 0815 ie22h 35m
05 Sep 2020 @ 094016h 39m
04 Sep 2020 @ 17018h 42m
04 Sep 2020 @ 08191d 22h 24m
02 Sep 2020 @ 095510d 16h 38m
22 Aug 2020 @ 17171d 26m
21 Aug 2020 @ 16511d 31m
20 Aug 2020 @ 16203d 5h 39m
17 Aug 2020 @ 104114h 29m
16 Aug 2020 @ 201238d 4h 53m
09 Jul 2020 @ 15198d 25m
01 Jul 2020 @ 145422d 6h 25m
09 Jun 2020 @ 0829 ie2d 19h 55m
06 Jun 2020 @ 123419h 33m
05 Jun 2020 @ 17015h 46m
05 Jun 2020 @ 11153h 52m
05 Jun 2020 @ 0723300d 21h 13m
09 Aug 2019 @ 101034d 22h 55m
05 Jul 2019 @ 1115 ie76d 19h 2m
19 Apr 2019 @ 1613206d 10h 55m
25 Sep 2018 @ 05183d 12h 35m
21 Sep 2018 @ 164321h 55m
20 Sep 2018 @ 184814d 22h 44m
05 Sep 2018 @ 20041d 58m
04 Sep 2018 @ 19068h 53m
04 Sep 2018 @ 10131d 16h 34m

Interval Statistics

Interval Count100
Min31m
Max300d 21h 13m
Mean10d 15h 50m
Median21h 45m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16009 07 Sep 2020 @ 1401 07 Sep 2020 @ 1445 William splashing in Main on arrival at 14:01, splash again at 14:03 and 14:08, water in bottom vent reaching the river by 14:12. river on weak at 14:23 with high and gold attempting to turn on unsuccessfully from 14:23-14:34, river pause at 14:34 for 4m when R, H, G and A all on at 14:38, no further splashes in main by 14:45.
14570 09 Jun 2020 @ 0944 --- underarockphoto Korben Cooper did not know the names of vents. He went down to check a reported eruption at 0513 and walked up to an event cycle. Via text we figured out which vent was which and he relayed all of the information to me via text message. I translated it to "Fan and Mortar-ese" and posted to GT. I need coffee. Flippin' kudos, Korben. That was spectacular.
9667 12 Aug 2018 @ 0923 --- Tara Arrived to find Bottom Vent's channel damp, Back Vents on, and huffs and low splashes in Upper Mortar. Probably the very end of an event cycle.
8367 30 May 2018 @ 1344 --- Janet Jones River vent on and very small splashing from Fan’s vents. No time for more observations.
6270 11 Sep 2017 @ 0608 --- Graham Garbage this morning but a couple of big splashes from MV 0608 while river on when I returned after being gone for 35m. GV started 0616. AV 0619. Bottom Vent runoff to the river by 0608. Water levels were pretty good until 0629. RV off 0708 so it was on at least an hour.
4371 27 Jun 2017 @ 1937 --- Kitt B River off with at least 4 splashes in Main. Gold on at 2001. I relayed several calls, but didn't write anything until I (Kitt) got there. Water levels were variable to poor with Angle almost the biggest. (Will delete this when Chris puts his info in.)
3070 15 Jun 2016 @ 0717 --- JimS River off 0717. Splashing began 0732. River on 0745, Gold 0753, Angle 0756. Declared dead 0810.
1786 23 Jun 2015 @ 1630 23 Jun 2015 @ 1710 bhoppe Probably arrived during a River pause, runoff from minor vents was totally dry. Main Vent was splashing upon arrival. River pause at 1641 (d=5m). Water was visible in Upper Mortar throughout the pause. River on 1646, Gold on at 1656, Angle on at 1702. Water levels never really looked good.
776 21 Apr 2013 @ 1156 21 Apr 2013 @ 1325 WillBoekel
  • 11:56 Bottom spritzing
  • 11:58:10 light steam in main
  • 12:01 Upper Mortar steam -few sec
  • 12:02:20 small splashes in lower mortar
  • 12:02 River On
  • 12:03:50 High on
  • 12:08 Gold on
  • 12:09 Angle on
  • 12:27 Upper Mortar steam
  • 12:29 River off-Angle continue
  • 12:31 Bottom spritzing
  • 12:33 River on
  • 12:34 High on then Gold also
  • 12:35 Gold cough
  • 12:39 light steam in main
  • 12:40 small splashes in Lower Mortar
  • 12:41 River on
  • 12:41 High on
  • 12:42 light steam in main
  • 12:44:45 Gold on
  • 12:49 Angle on
  • 12:50 Bottom vent now quiet
  • 13:00 small grumble in Upper Mortar
  • 13:03 All vents in system off
  • 13:04 Angle blipping
  • 13:05 Angle increase in strength
  • 13:06 Bottom spritzing
  • 13:16 River on
  • 13:18:42 Gold and high on-Gold first by a second or two
  • 13:25 Angle on
  • 26 13 Sep 2011 @ 1300 --- Graham Approx 1300 river pause and splashing in Main vent
    EntrySourceLinkComment
    06 Jun 2018 @ 1228 JSJ https://www.youtube.com/watch?v=V6v-pWJqTwY#t=5m22s Clips 16-17 of this video compilation (= time stamp 5:22 to 5:46) show the end of Fan Geyser’s 12:28 to 1:18 PM event cycle on 6 June 2018.
    14 Aug 2018 @ 1750 JSJ https://www.youtube.com/watch?v=V6v-pWJqTwY#t=3m27s Clips 11-15 of this video compilation (= time stamp 3:27 to 5:21) show Fan Geyser's 5:50 PM-onward event cycle on 14 August 2018.
    02 Jul 2016 @ 0951 JSJ https://www.youtube.com/watch?v=dqqb0EG5ODE#t=6m15s Clips 13-19 of this video compilation (time stamp 6:15 to time stamp 11:06) show Fan Geyser's 9:51 AM-onward event cycle on 2 July 2016.
    04 Jul 2016 @ 1315 JSJ https://www.youtube.com/watch?v=dqqb0EG5ODE#t=11m06s Clips 20-23 of this video compilation (time stamp 11:06 to time stamp 12:39) show Fan Geyser's 1:15 to 2:22 PM event cycle on 4 July 2016.
    Baseline does not exist.