Last Known Eruption
36d 18h 27m ago

Latest Eruptions

EruptionDurationInterval
10 Nov 2017 @ 2008:40 E5d 18h 5m 0s
05 Nov 2017 @ 0203:40 E5d 4h 51m
30 Oct 2017 @ 2212 wc7d 7h 53m
23 Oct 2017 @ 1418:40 E8d 3h 24m
15 Oct 2017 @ 10546d 10h 54m
09 Oct 2017 @ 0000 wc5d 14h 44m
03 Oct 2017 @ 0916 ns wc5d 3h 2m
28 Sep 2017 @ 0614 ns wc7d 8h 5m
20 Sep 2017 @ 2208:40 E14d 11h 6m
06 Sep 2017 @ 110229m 5d 14h 56m
31 Aug 2017 @ 200634m 9d 6h 23m
22 Aug 2017 @ 134333m 10d 49m
12 Aug 2017 @ 125431m 9d 16h 25m
02 Aug 2017 @ 202929m 2d 14h 5m
31 Jul 2017 @ 062434m 11d 14h 57m
19 Jul 2017 @ 152734m 10d 9h 22m
09 Jul 2017 @ 060533m 9d 12h 41m
29 Jun 2017 @ 1723 E9d 11h 42m
20 Jun 2017 @ 0541 wc4d 13h 34m
15 Jun 2017 @ 160729m 103d 3h 28m
04 Mar 2017 @ 1138 E24d 15h 40m
07 Feb 2017 @ 1958 E19d 1h 50m
19 Jan 2017 @ 1808 E17d 16h 0m
02 Jan 2017 @ 0208 E8d 20h 5m
24 Dec 2016 @ 0603 E10d 12h 22m
13 Dec 2016 @ 1741 ns wc4d 17h 42m
08 Dec 2016 @ 2358 E8d 5h 45m
30 Nov 2016 @ 1813 E11d 0m
19 Nov 2016 @ 1813 E3d 19h 40m
15 Nov 2016 @ 2233 E6d 7h 40m
09 Nov 2016 @ 1453 E4d 6h 40m
05 Nov 2016 @ 091332m 14d 14h 44m
21 Oct 2016 @ 1828 E5d 10h 54m
16 Oct 2016 @ 0734 wc7d 13h 21m
08 Oct 2016 @ 181329m 7d 20h 34m
30 Sep 2016 @ 2138 E3d 9h 39m
27 Sep 2016 @ 115936m 4d 6h 5m
23 Sep 2016 @ 0554 wc5d 2h 37m
18 Sep 2016 @ 0317 wc7d 4h 50m
10 Sep 2016 @ 2227 wc7d 11h 41m
03 Sep 2016 @ 104637m 5d 20h 33m
28 Aug 2016 @ 141333m 6d 1h 20m
22 Aug 2016 @ 125333m 4d 8m
18 Aug 2016 @ 124529m 4d 1h 55m
14 Aug 2016 @ 105033m 5d 21h 41m
08 Aug 2016 @ 130933m 4d 21h 9m
03 Aug 2016 @ 160035m 5d 19h 57m
28 Jul 2016 @ 200333m 4d 23h 16m
23 Jul 2016 @ 204731m 4d 15h 10m
19 Jul 2016 @ 053730m 4d 6h 48m
14 Jul 2016 @ 224929m 5d 10h 19m
09 Jul 2016 @ 123030m 4d 22h 8m
04 Jul 2016 @ 142236m 9d 19h 29m
24 Jun 2016 @ 185332m 4d 6h 5m
20 Jun 2016 @ 124835m 4d 19h 49m
15 Jun 2016 @ 165937m 7d 20h 4m
07 Jun 2016 @ 2055>33m 6d 19h 57m
01 Jun 2016 @ 0058 wc6d 5h 3m
25 May 2016 @ 1955 ie9d 19h 55m
16 May 2016 @ 0000 A6d 2h 0m
09 May 2016 @ 2200 A5d 9h 20m
04 May 2016 @ 12406d 12h 40m
28 Apr 2016 @ 0000 A5d 3h 29m
22 Apr 2016 @ 2031 wc6d 4h 57m
16 Apr 2016 @ 153433m 21d 17h 7m
25 Mar 2016 @ 2227 ? wc5d 2h 35m
20 Mar 2016 @ 1952 wc14d 10h 46m
06 Mar 2016 @ 0806 wc19d 11h 52m
15 Feb 2016 @ 2014 wc23d 6h 19m
23 Jan 2016 @ 1355 wc11d 13h 5m
12 Jan 2016 @ 0050 wc4d 19h 55m
07 Jan 2016 @ 0455 wc7d 18h 40m
30 Dec 2015 @ 1015 A16d 5h 31m
14 Dec 2015 @ 0444 wc18d 4h 49m
25 Nov 2015 @ 2355 wc16d 23h 55m
09 Nov 2015 @ 0000 A13d 3h 32m
26 Oct 2015 @ 2128 wc19d 2h 29m
07 Oct 2015 @ 185940d 9h 27m
28 Aug 2015 @ 093232m 126d 13h 3m
23 Apr 2015 @ 2029 ie wc114d 5h 29m
30 Dec 2014 @ 1400 wc6d 14h 0m
24 Dec 2014 @ 0000 A11d 0m
13 Dec 2014 @ 0000 A43d 11h 40m
30 Oct 2014 @ 13204d 13h 20m
26 Oct 2014 @ 0000 A11d 9h 38m
14 Oct 2014 @ 142229 m. +5d 1h 32m
09 Oct 2014 @ 12506d 12h 50m
03 Oct 2014 @ 0000 ? A6d 8h 59m
26 Sep 2014 @ 15014d 16h 1m
21 Sep 2014 @ 2300 A6d 9h 0m
15 Sep 2014 @ 14006d 16h 40m
08 Sep 2014 @ 2120 A9d 7h 51m
30 Aug 2014 @ 132932m 6d 5h 4m
24 Aug 2014 @ 082534m 7d 4h 55m
17 Aug 2014 @ 0330 A4d 8h 34m
12 Aug 2014 @ 185630m 5d 18h 56m
07 Aug 2014 @ 0000 A4d 0m
03 Aug 2014 @ 0000 A5d 18h 16m
28 Jul 2014 @ 0544 wc9d 18h 34m
18 Jul 2014 @ 1110 ns31m 2d 23h 27m

Interval Statistics

Interval Count100
Min2d 14h 5m
Max126d 13h 3m
Mean12d 3h 27m
Median6d 13h 25m

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
7812 03 Nov 2017 @ 1437 --- steve No eruption overnight.
7811 02 Nov 2017 @ 1245 --- steve No eruption overnight
7801 31 Oct 2017 @ 1214 --- steve From the signs at Fan & Mortar It does appear it erupted last night
7795 29 Oct 2017 @ 1349 --- billwarnock Big steam cloud in Fan and Mortar area. Louise checked later and said it hadn't erupted. Steam billowing until 1406. I don't think it was Artemisia.
7711 15 Oct 2017 @ 1330 --- WillBoekel Area washed and fan and mortar dead in recovery mode.
7710 15 Oct 2017 @ 1054 --- Janet White Lots of steam in the right place as seen from Grand but snow still on the wrong place for an eruption to have occurred. Steve C and I aren’t sure what we saw -will share a photo of the steam cloud for input.
7685 03 Oct 2017 @ 0944 --- Kitt B end time for Fan & Mortar
6919 22 Sep 2017 @ 1030 --- Csiegel Lots of gurgling. Main, river, gold, angle all on sustaining about 2ft bursts then nothing.
6856 20 Sep 2017 @ 0823 --- JimS No eruption yet.
6854 19 Sep 2017 @ 1645 --- Csiegel Nuthin... Lots of churning. Gold on. River on.
6851 19 Sep 2017 @ 1250 --- Polly No F & M yet.
6808 18 Sep 2017 @ 1600 --- Polly Unattended
6804 18 Sep 2017 @ 1240 --- Polly Unattended.
6751 18 Sep 2017 @ 0740 --- JimS No eruption yet.
6664 17 Sep 2017 @ 1730 --- Polly Unattended
6627 17 Sep 2017 @ 0659 --- JimS No eruption yet.
6613 16 Sep 2017 @ 1925 --- Tara Unattended.
6435 16 Sep 2017 @ 0454 --- Graham No eruption overnight
6433 15 Sep 2017 @ 2002 --- RLJones No eruption yet. F&M unattended.
6373 14 Sep 2017 @ 2009 --- RLJones No eruption yet. F&M now unattended.
6363 14 Sep 2017 @ 0500 --- Graham No eruption overnight
6362 13 Sep 2017 @ 1902 --- Graham Abandoned after event cycle and to avoid more of the storm.
6328 13 Sep 2017 @ 0550 --- Graham No eruption overnight
6326 12 Sep 2017 @ 1957 --- Tara Unattended.
6287 12 Sep 2017 @ 0550 --- Graham No eruption yet
6286 11 Sep 2017 @ 1915 --- Polly Unattended
6266 10 Sep 2017 @ 1920 --- Polly Unattended
6261 10 Sep 2017 @ 0953 10 Sep 2017 @ 1142 Polly Mostly organized series of cycles (long cycle, quick cycle, quick River & Angle on then off, cycle with decent water). This is what I like to see. Worth keeping an eye on.
6252 10 Sep 2017 @ 0953 --- Polly Bottom Vent channel damp almost to the river.
5552 31 Aug 2017 @ 1815 --- c.barwin Unattended. Finishing a normal cycle.
5516 31 Aug 2017 @ 0632 --- JimS No eruption yet.
5514 30 Aug 2017 @ 2000 --- Tara Unattended.
5507 30 Aug 2017 @ 0800 --- c.barwin No overnight eruption.
5197 22 Aug 2017 @ 0625 --- JimS No eruption yet.
5192 21 Aug 2017 @ 1940 --- c.barwin unattended. RV on 1921, GV on 1935, AV on 1940
5180 20 Aug 2017 @ 2245 --- Tara No eruption as of this time. Regular cycle in progress at 2230.
5175 20 Aug 2017 @ 1820 --- c.barwin unattended. river on at 1759
5155 20 Aug 2017 @ 0636 --- JimS No eruption yet.
5037 19 Aug 2017 @ 0636 --- JimS No eruption yet.
4940 18 Aug 2017 @ 0639 --- JimS No eruption yet.
4882 12 Aug 2017 @ 0626 --- JimS No eruption yet.
4876 11 Aug 2017 @ 2048 --- Tara Unattended.
4875 11 Aug 2017 @ 0626 --- JimS No eruption yet.
4874 10 Aug 2017 @ 2123 --- AndrewW Unattended
4872 10 Aug 2017 @ 1525 --- Tara Unattended.
4870 10 Aug 2017 @ 0643 --- JimS No eruption yet.
4867 09 Aug 2017 @ 1436 --- Tara Checked for one cycle, abandoned due to another storm.
4866 09 Aug 2017 @ 1308 --- c.barwin Unattended... thunder & lightening, time to go. Calling it a day. Apologies.
4838 09 Aug 2017 @ 0626 --- JimS Has not erupted.
4833 08 Aug 2017 @ 0640 --- JimS Did not erupt overnight.
4820 07 Aug 2017 @ 0834 --- AndrewW No overnight eruption, at least one event cycle this morning based on report from JoeB
4586 31 Jul 2017 @ 0520 --- AndrewW No overnight eruption
4582 30 Jul 2017 @ 2118 --- AndrewW F&M unattened, no event cycles all day. Final cycles of the day had decent water and lots of steam from main vent but no event cycles.
4579 30 Jul 2017 @ 0610 --- JimS No eruption overnight.
4574 29 Jul 2017 @ 2106 --- Tara Unattended.
4573 29 Jul 2017 @ 0432 --- AndrewW No overnight eruption. Runoff channels of bottom vent are wet to river.
4568 28 Jul 2017 @ 2112 --- Tara Unattended.
4563 28 Jul 2017 @ 0632 --- Suzanne Did not erupt overnight.
4551 27 Jul 2017 @ 0540 --- SteveO No F&M yet.
4543 26 Jul 2017 @ 0625 --- AndrewW No overnight eruption
4530 25 Jul 2017 @ 0545 --- SteveO No F&M yet.
4493 19 Jul 2017 @ 0553 --- SteveO No F&M yet.
4490 18 Jul 2017 @ 2150 --- Tara Unattended.
4479 18 Jul 2017 @ 0600 --- SteveO No F&M yet.
4474 17 Jul 2017 @ 0604 --- SteveO No eruption overnight
4470 15 Jul 2017 @ 2111 --- Tara Unattended.
4424 09 Jul 2017 @ 0500 --- Graham No eruption overnight.
4417 08 Jul 2017 @ 0520 --- Graham No eruption overnight.
4413 07 Jul 2017 @ 0500 --- Graham No eruption overnight.
4412 06 Jul 2017 @ 2115 --- Tara Unattended. 80-minute cycles up to this time.
4410 06 Jul 2017 @ 0500 --- Graham No eruption overnight.
4409 05 Jul 2017 @ 2006 --- Archer Unattended, no event cycles during my sit 1500-2000.
4406 05 Jul 2017 @ 0445 --- Graham No eruption overnight.
4403 04 Jul 2017 @ 0445 --- Graham No eruption overnight
4377 29 Jun 2017 @ 0824 --- SteveO No F&M yet.
4374 28 Jun 2017 @ 0555 --- SteveO No F&M yet.
4368 27 Jun 2017 @ 0535 --- Kitt B no eruption overnight, they are watching
4361 26 Jun 2017 @ 0558 --- Dave from B No eruption overnight
4359 25 Jun 2017 @ 2125 --- Tara Unattended.
4357 25 Jun 2017 @ 0745 --- Polly Did not erupt overnight.
4355 24 Jun 2017 @ 2100 --- Tara F&M unattended.
4489 19 Jun 2017 @ 1256 19 Jun 2017 @ 1614 Polly Fan's water levels have recovered from the June 15 eruption.
4320 15 Jun 2017 @ 1122 --- Polly Bottom Vent channel damp almost to the river.
4313 14 Jun 2017 @ 1316 14 Jun 2017 @ 1427 Polly Cough at 1318, followed by River Vent pause at 1340. Main Vent huffs but no splashes observed. River Vent off at1427 with Angle continuing.
4221 06 Jun 2017 @ 0747 --- AndrewW No overnight eruption, bottom vent run off channels damp to the river.
4188 03 Jun 2017 @ 1040 03 Jun 2017 @ 1322 Polly Bottom Vent runoff channel damp about 1/3 of the way down when I arrived. Long and organized cycles with the exception of a River cough followed by River off for approximately 9 minutes. Overall, Fan's vents had decent water but little steam from Main Vent. Gold 2&3 came on during 2 of the 3 cycles I saw.
3981 21 Apr 2017 @ 1114 --- WillBoekel No recent eruption.
3966 11 Apr 2017 @ 1700 --- Bijoumonkey area not washed
3914 22 Jan 2017 @ 1500 --- Graham Layer of ice under an inch or two of fresh snow. Maybe from Thursday?
3910 19 Jan 2017 @ 1814 --- Graham Probably wishful thinking but it looked like steam in the right spot on the webcam and too early for Riverside. Pretty dark though. GO F&M!
3839 04 Nov 2016 @ 0905 --- steve No eruption of Fan & Mortar from 10-30-16 at 1300 to 11-4-16 at 0900.
3833 31 Oct 2016 @ 1036 --- steve No F & M overnight
3834 30 Oct 2016 @ 1301 --- steve A short event cycle. River on 1301. Main vent splashes at 1309 and 1313 only. River off 1314. River on 1324, gold 1334, angle 1339. For several minutes High varied from 1 to 6 feet every 3 seconds, then it increased to 4 to 8 feet for 2 minutes, then everything died.
3829 29 Oct 2016 @ 1621 --- DanS Cycles but no eruption this afternoon. Lower Mortar strong.
3816 26 Oct 2016 @ 1400 --- DanS Cycles. No eruption
3807 25 Oct 2016 @ 1400 --- DanS Event cycle. Stronger action than Sunday.
3799 23 Oct 2016 @ 1231 --- Janet White area not washed.
3794 21 Oct 2016 @ 1837 21 Oct 2016 @ 1843 Pat Snyder Possible F&M ie at 1837 webcam? Steam in the right spot. Riverside not due, based on the on-site time from earlier today (8 hours ago).
3790 16 Oct 2016 @ 0608 --- SteveO No F&M yet.
3789 15 Oct 2016 @ 1720 --- Kitt B No Fan and Mortar yet
EntrySourceLinkComment
22 Aug 2017 @ 1343 JSJ https://www.youtube.com/watch?v=CHxKxRM53s0 Video by David Schwarz of Fan & Mortar's 1:43 to 2:16 PM eruption on 22 August 2017. The action starts at about time stamp 0:40.
04 Aug 2009 @ 0930 Tara https://youtu.be/j6kgoHwTRVg Video by Tara Cross.
22 Jul 2009 @ 1705 Tara https://youtu.be/SXrTs60JXFU Video by Tara Cross.
24 Aug 2008 @ 0856 Tara https://youtu.be/tXbXAvnTAqo Video by Tara Cross.
03 Sep 2016 @ 1046 JSJ https://www.youtube.com/watch?v=fHBNk8QUtOc Another video showing the lead-up & initiation of Fan & Mortar Geysers' late morning eruption on 3 September 2016 (the action starts at time stamp 3:44).
27 Sep 2016 @ 1159 JSJ https://www.youtube.com/watch?v=jTesyPxEi1k Video of Fan & Mortar Geysers' noon-time eruption on 27 September 2016.
03 Sep 2016 @ 1046 JSJ https://www.youtube.com/watch?v=Wi4GAkZtZ6Q Video of lead-up & initiation of Fan & Mortar Geysers' late morning eruption on 3 September 2016.
03 Aug 2016 @ 1600 JSJ https://www.youtube.com/watch?v=M4D-IWcJ0RM Video of Fan & Mortar Geysers' 4:00 PM-onward eruption on 3 August 2016.
04 Jul 2016 @ 1422 JSJ https://www.flickr.com/photos/jsjgeology/28118687280 Thermal image (1 of 6) of Fan Geyser's 2:22 to 2:58 PM eruption on 4 July 2016.
04 Jul 2016 @ 1422 JSJ https://www.flickr.com/photos/jsjgeology/27755417113 Photo (1 of 10) of Fan Geyser's 2:22 to 2:58 PM eruption on 4 July 2016.
04 Jul 2016 @ 1422 JSJ https://www.youtube.com/watch?v=dqqb0EG5ODE#t=12m40s Clips 24-36 of this video compilation (time stamp 12:40-onward) show Fan Geyser's 2:22 to 2:58 PM eruption on 4 July 2016.
23 Jan 2015 @ 1317 WillBoekel https://www.youtube.com/watch?v=jfzijBk43wc&list=PLROlDXCUlcDtsmrLRYTjg8BqhsS_TXTB2&index=6 Here is the capture from that day Don't see any F&M steam at 1317 or after that point.
27 Jul 2010 @ 1956 Tara https://www.youtube.com/watch?v=D2MA9VbvFBA&feature=youtu.be Video of eruption by Tara Cross. Eruption starts at about 7:50 in the video.
30 Sep 2012 @ 1148 Micah Kipple https://www.youtube.com/watch?v=fuM2EV8SVx8 Will Boekel Video
13 Jun 2010 @ 1628 Micah Kipple https://www.youtube.com/watch?v=-6jwMgW4TX8 Another angle
13 Jun 2010 @ 1628 Micah Kipple https://www.youtube.com/watch?v=OskvCNPAoeQ Video
11 Jul 2001 @ 1228 Micah Kipple https://www.youtube.com/watch?v=qxnA2ZlMxpY David Schwarz Video
05 Nov 2014 @ 0953 WillBoekel https://www.facebook.com/photo.php?fbid=10152501200878723&set=pcb.10152519037592399&type=1&theater Post in FB Geyser Gazers
15 Sep 2014 @ 1400 WillBoekel https://www.youtube.com/watch?v=VYfQqNzoHEQ Found a video that was posted by a visitor
12 Aug 2014 @ 1856 WillBoekel https://www.youtube.com/watch?v=bXwoxoU_Jc8 Go Pro Video
BaselineDistance (ft)Description
Rock 100Both markers are on a rock behind the benches on the upstream side of the path


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