Last Known Eruption
23d 8h 13m ago

Latest Eruptions

Eruption DurationInterval
31 Oct 2020 @ 14128d 22h 49m
22 Oct 2020 @ 15232m
22 Oct 2020 @ 15218d 4h 9m
14 Oct 2020 @ 11124d 17h 28m
09 Oct 2020 @ 17444m
09 Oct 2020 @ 17404d 2h 10m
05 Oct 2020 @ 15303m
05 Oct 2020 @ 15274h 42m
05 Oct 2020 @ 10454m
05 Oct 2020 @ 10412m
05 Oct 2020 @ 103911m
05 Oct 2020 @ 10281d 23h 26m
03 Oct 2020 @ 110218h 31m
02 Oct 2020 @ 16313m
02 Oct 2020 @ 162810d 3h 8m
22 Sep 2020 @ 13203m
22 Sep 2020 @ 13179d 20h 50m
12 Sep 2020 @ 16275m
12 Sep 2020 @ 16223m
12 Sep 2020 @ 161912m
12 Sep 2020 @ 1607 ini5h 22m
12 Sep 2020 @ 10452m
12 Sep 2020 @ 1043 ini1d 23h 19m
10 Sep 2020 @ 11245m
10 Sep 2020 @ 11193m
10 Sep 2020 @ 11163d 14h 41m
06 Sep 2020 @ 20353m
06 Sep 2020 @ 20326m
06 Sep 2020 @ 2026 ini5h 12m
06 Sep 2020 @ 15143m
06 Sep 2020 @ 15115h 35m
06 Sep 2020 @ 09364m
06 Sep 2020 @ 09328h 46m
06 Sep 2020 @ 00463m
06 Sep 2020 @ 00439h 35m
05 Sep 2020 @ 150817h 55m
04 Sep 2020 @ 21134m
04 Sep 2020 @ 2109 ini5h 7m
04 Sep 2020 @ 16022m
04 Sep 2020 @ 160018m
04 Sep 2020 @ 1542 ini15h 45m
03 Sep 2020 @ 23573h 50m
03 Sep 2020 @ 20076m
03 Sep 2020 @ 2001 ini1d 4h 40m
02 Sep 2020 @ 1521 ini3d 2h 30m
30 Aug 2020 @ 1251 A ini12h 18m
30 Aug 2020 @ 00335m
30 Aug 2020 @ 0028 ini4h 19m
29 Aug 2020 @ 2009 ini1d 2h 42m
28 Aug 2020 @ 17273m
28 Aug 2020 @ 1724 ini4h 59m
28 Aug 2020 @ 12254d 19h 22m
23 Aug 2020 @ 17035h 26m
23 Aug 2020 @ 11379d 22h 12m
13 Aug 2020 @ 13251d 3h 16m
12 Aug 2020 @ 10091d 4h 26m
11 Aug 2020 @ 054310h 14m
10 Aug 2020 @ 19293m
10 Aug 2020 @ 19261d 8h 31m
09 Aug 2020 @ 10556m
09 Aug 2020 @ 10491d 52m
08 Aug 2020 @ 09574m
08 Aug 2020 @ 09532m
08 Aug 2020 @ 09511d 13h 56m
06 Aug 2020 @ 195522h 27m
05 Aug 2020 @ 21284m
05 Aug 2020 @ 21245m
05 Aug 2020 @ 211921h 42m
04 Aug 2020 @ 23373m
04 Aug 2020 @ 2334 ini3d 10h 19m
01 Aug 2020 @ 13153m
01 Aug 2020 @ 13124h 48m
01 Aug 2020 @ 08241d 13h 40m
30 Jul 2020 @ 18443m
30 Jul 2020 @ 18413d 1h 54m
27 Jul 2020 @ 16477h 47m
27 Jul 2020 @ 090016h 27m
26 Jul 2020 @ 16333m
26 Jul 2020 @ 16301d 8h 21m
25 Jul 2020 @ 08093m
25 Jul 2020 @ 08061d 11h 6m
23 Jul 2020 @ 21004m
23 Jul 2020 @ 20561d 7h 27m
22 Jul 2020 @ 13293m
22 Jul 2020 @ 13261d 17h 15m
20 Jul 2020 @ 20113m
20 Jul 2020 @ 20082d 23h 51m
17 Jul 2020 @ 20171d 11h 1m
16 Jul 2020 @ 09163m
16 Jul 2020 @ 091312h 31m
15 Jul 2020 @ 20423m
15 Jul 2020 @ 20391d 1h 29m
14 Jul 2020 @ 1910~20s 5m
14 Jul 2020 @ 1905~25s 3d 10h 40m
11 Jul 2020 @ 08253m
11 Jul 2020 @ 082212h 47m
10 Jul 2020 @ 1935 A4h 50m
10 Jul 2020 @ 14454d 20h 7m
05 Jul 2020 @ 183810h 15m
05 Jul 2020 @ 082325s 3m

Interval Statistics

Interval Count100
Min2m
Max10d 3h 8m
Mean1d 4h 22m
Median5h 3m
Initial-to-Initial
Interval Count11
Min4h 19m
Max23d 17h 50m
Mean3d 12h 24m
Median1d 2h 45m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16391 10 Oct 2020 @ 1311 --- steve MT may have done something behind Fountain’s steam cloud.
16002 06 Sep 2020 @ 1504 --- jkgood Boiled up
16119 04 Sep 2020 @ 2104 --- Tara Boiled up.
15966 04 Sep 2020 @ 1606 --- Tara boiled up, no eruption
15965 04 Sep 2020 @ 1551 --- Tara boiled up, no eruption
15567 13 Aug 2020 @ 1749 13 Aug 2020 @ 1750 JSJ Bubbling, roiling, churning, doming, but no eruption.
15503 10 Aug 2020 @ 1928 --- minissa Weren't sure what to call this. It had one tall (? 20 feet) burst from sub-surface pool followed by a bit of splashing seen above the top of the opening, then drained
15370 04 Aug 2020 @ 2341 --- Tara boil up
14985 14 Jul 2020 @ 1909 --- William boiled but did not erupt
14529 03 Jun 2020 @ 2146 --- William failed attempt at eruption
13879 04 Oct 2019 @ 1800 --- Tara Visible water level ~8" below inner rim, group probably in a stall. See other notes.
13823 27 Sep 2019 @ 1936 27 Sep 2019 @ 1937 Tara Boiled up and filled basin but did not erupt.
13776 21 Sep 2019 @ 1906 21 Sep 2019 @ 1908 Tara Overflowed main crater rim with boiling over vent, had two small splashes at 1908, then dropped below rim without erupting.
13695 14 Sep 2019 @ 2348 --- Tara More eruptions may have happened during Fountain, but it was too steamy to see for sure.
13584 05 Sep 2019 @ 2008 --- Graham Boiled up
13556 05 Sep 2019 @ 0509 --- Graham Boiled with wesk splashes but did not erupt.
13543 04 Sep 2019 @ 1505 --- Graham Boiled up but didnt erupt.
13529 03 Sep 2019 @ 1636 --- Graham Boiled up but didnt erupt.
13494 01 Sep 2019 @ 1622 --- Graham Boiled up but didn't erupt.
13479 31 Aug 2019 @ 1738 --- Tara Boiled up for over a minute
13456 29 Aug 2019 @ 1655 --- steve Boiled to a few feet
13277 16 Aug 2019 @ 0018 --- Tara Boiled up without erupting
13261 14 Aug 2019 @ 1841 --- minissa Water rose as 1841 Fountain started and stayed up for at least 20 min (hard to see due to steam and wind direction), occasional bubbles but never erupted
13224 13 Aug 2019 @ 1920 --- Tara Visible boil.
13155 10 Aug 2019 @ 1951 --- Tara Boiled up for about a minute but did not erupt. Water level dropped but boiling stayed in view for several minutes.
13152 10 Aug 2019 @ 1849 --- Tara Visible boiling in progress on arrival.
13144 10 Aug 2019 @ 1130 --- Tara Visible boiling
13130 09 Aug 2019 @ 1342 --- Tara Visible boiling
13020 04 Aug 2019 @ 0942 --- Stephen_Gemar Boiled up at this time.
12944 01 Aug 2019 @ 2223 --- Tara Boiled up.
12910 01 Aug 2019 @ 0716 --- rbwhitaker Boiled up two or three feet, but I didn't see it erupt.
12501 16 Jul 2019 @ 0858 --- Barbara Lasseter Longish boil with one 3-4 ft burst
12496 16 Jul 2019 @ 0146 --- Tara Boiled up but did not erupt.
12460 12 Jul 2019 @ 1712 --- Tara First blips visible. Boils got stronger but Thief had not erupted as of 1815.
12043 29 Jun 2019 @ 1827 --- Tara First water seen.
11996 27 Jun 2019 @ 2204 --- Tara boiled up
11994 27 Jun 2019 @ 2102 27 Jun 2019 @ 2142 Tara Visible water level and boiling in crater on arrival at 2102. Water level continued to rise until several boil ups just prior to the initial eruption.
11590 05 Jun 2019 @ 0701 --- Graham Big boil
11430 30 May 2019 @ 2110 --- Tara Water visible. No eruption of Fountain or Morning as of 2125.
11433 30 May 2019 @ 1000 --- Kyle boiling up within crater up to 2 ft H D= ~10 sec. boiling audible within FTN immediately prior
11432 30 May 2019 @ 0952 --- Kyle boiling within crater 1-2 ft H. D<10 s. audible boiling within Fountain immediately prior
11431 30 May 2019 @ 0944 --- Kyle boiling up within crater with a little water briefly visible. <1ft. audible boiling within Fountain immediately prior to MT
11406 28 May 2019 @ 2154 --- Graham Boil up.
11405 28 May 2019 @ 2129 --- Graham Boil up.
11303 21 May 2019 @ 1430 21 May 2019 @ 1457 Kyle Steam cleared enough to see MT continual boiling 6-12 inches within crater prior to eruption
11278 21 May 2019 @ 0553 --- Micah Kipple Periodically rising and surging.
11207 10 May 2019 @ 2129 --- Tara Boiled up 2-3 feet.
11011 20 Apr 2019 @ 1405 --- DanS Boiling but no eruption.
7736 03 Sep 2017 @ 2359 --- Tara Boiled up but did not erupt.
5669 03 Sep 2017 @ 1030 --- Graham Boiled with a few splashes but not a full wruption.
5678 06 Aug 2017 @ 2054 --- JSJ Roiling at 2054 to 2055, but no eruption.
4886 04 Aug 2017 @ 1817 --- Tara Boiled up.
4885 03 Aug 2017 @ 2036 --- Tara Boiled up.
4463 13 Jul 2017 @ 1921 --- Tara Boiled up enough tobout water in basin.
4456 12 Jul 2017 @ 2202 --- Tara Boiled up but did not erupt.
4453 09 Jul 2017 @ 1938 --- Tara Very weak boil-up, water barely visible.
4383 30 Jun 2017 @ 2128 --- Tara Boiled up weakly at 2128, 2130, and 2131, no water into basin.
4382 29 Jun 2017 @ 2132 --- Tara Boiled up with water into the basin but did not erupt.
4282 08 Jun 2017 @ 2138 --- Tara Boiled up but did not erupt.
4148 27 May 2017 @ 1737 --- Tara Boiled up but did not erupt.
4091 12 May 2017 @ 2054 --- Tara Boiled up, no eruption.
4085 12 May 2017 @ 1248 --- Tara boiled up but did not erupt
4042 04 May 2017 @ 1706 --- Tara boiled up but did not erupt
3479 12 Aug 2016 @ 1623 --- JSJ Morning's Thief Geyser engaged in basin-wide roiling from 1623 to 1624, but no follow-up eruption(s).
3415 02 Aug 2016 @ 1718 --- JSJ Roiling at 1718, but no follow-up eruptions.
3412 02 Aug 2016 @ 1211 02 Aug 2016 @ 1213 JSJ Morning's Thief Geyser engaged in low roiling at 1211 and 1213, but no follow-up eruptions.
3387 30 Jul 2016 @ 1708 30 Jul 2016 @ 1712 Tara Boiled up at 1708 and 1712, no eruption.
2120 13 Aug 2015 @ 1312 --- JSJ Pool level rising with roiling/boiling at 1312, but no immediately subsequent eruption.
658 31 Oct 2012 @ 0000 31 Oct 2012 @ 1200 Maureen Steve was out at Fountain last night and saw multiple Morning\'s Thief eruptions for over 3 hours, yet no Fountain or Morning activity.
2708 30 Aug 2010 @ 1630 --- Tara Morning's Thief boiled up to about 5 feet at the start of Fountain but didn't have a full eruption.
EntrySourceLinkComment
09 Aug 2018 @ 1223 JSJ https://www.flickr.com/photos/jsjgeology/45811573254 Photo (1 of 4) of Morning Thief's Geyser's 12:23 PM eruption on 9 August 2018.
09 Aug 2018 @ 1218 JSJ https://www.flickr.com/photos/jsjgeology/46483349132 Photo (1 of 2) of Morning Thief's Geyser's 12:18 PM eruption on 9 August 2018.
06 Aug 2017 @ 1304 JSJ https://www.flickr.com/photos/jsjgeology/36442715011 Photo (out of 6) of Morning's Thief Geyser's 1:04 PM eruption on 6 August 2017.
10 Aug 2017 @ 1700 JSJ https://www.flickr.com/photos/jsjgeology/36183820090 Photo (out of 3) of Morning's Thief Geyser's 5:00 PM eruption on 10 August 2017.
10 Aug 2017 @ 1703 JSJ https://www.flickr.com/photos/jsjgeology/36183816810 Photo (1 of 4) of Morning's Thief Geyser's 5:03 to 5:04 eruption on 10 August 2017.
14 May 2015 @ 1715 JSJ https://www.youtube.com/watch?v=NHF-LylA7UY Video of the 5:15 PM eruption of Morning Thief's Geyser on 14 May 2015.
08 Jul 2014 @ 0826 JSJ https://www.youtube.com/watch?v=7zuQk8JsNTQ Clip # 1 of this video compilation depicts the Morning's Thief-Fountain dual eruption.
12 Jul 2014 @ 1532 JSJ https://www.youtube.com/watch?v=RKmS2pgjyGw Clips # 1-2 and # 7-8 of this video compilation depict the Fountain-Morning's Thief dual eruptions at 1532-1533 and 1536-1537.
Baseline does not exist.