Last Known Eruption
18h 21m ago

Latest Eruptions

Eruption DurationInterval
24 Jul 2021 @ 19164m
24 Jul 2021 @ 19126m
24 Jul 2021 @ 1906 ini4h 57m
24 Jul 2021 @ 1409 ie4h 44m
24 Jul 2021 @ 09253m
24 Jul 2021 @ 092214h 37m
23 Jul 2021 @ 18454m
23 Jul 2021 @ 18411d 3h 1m
22 Jul 2021 @ 15403m
22 Jul 2021 @ 1537 A4m
22 Jul 2021 @ 15336h 40m
22 Jul 2021 @ 08532d 16h 5m
19 Jul 2021 @ 16483m
19 Jul 2021 @ 1645 ini5h 48m
19 Jul 2021 @ 105714h 4m
18 Jul 2021 @ 20533m
18 Jul 2021 @ 205011h 3m
18 Jul 2021 @ 09473m
18 Jul 2021 @ 094414h 16m
17 Jul 2021 @ 19283m
17 Jul 2021 @ 19254h 41m
17 Jul 2021 @ 1443:403m
17 Jul 2021 @ 14405m
17 Jul 2021 @ 1434:555h 26m
17 Jul 2021 @ 09083m
17 Jul 2021 @ 09052m
17 Jul 2021 @ 090311h 24m
16 Jul 2021 @ 21394m
16 Jul 2021 @ 21353m
16 Jul 2021 @ 21325d 2h 17m
11 Jul 2021 @ 19153m
11 Jul 2021 @ 1912 ini10h 40m
11 Jul 2021 @ 08322d 19h 31m
08 Jul 2021 @ 13011d 15h 39m
06 Jul 2021 @ 21222d 7m
04 Jul 2021 @ 21153m
04 Jul 2021 @ 2112 ini1d 58m
03 Jul 2021 @ 20143m
03 Jul 2021 @ 20115m
03 Jul 2021 @ 2006 ini22h 8m
02 Jul 2021 @ 21583m
02 Jul 2021 @ 215516m
02 Jul 2021 @ 2139 ini5h 17m
02 Jul 2021 @ 16223m
02 Jul 2021 @ 16193m
02 Jul 2021 @ 161620h 31m
01 Jul 2021 @ 1945 ie21h 56m
30 Jun 2021 @ 21493m
30 Jun 2021 @ 214610m
30 Jun 2021 @ 2136 ini5h 31m
30 Jun 2021 @ 16052m
30 Jun 2021 @ 16039m
30 Jun 2021 @ 1554 ini5h 2m
30 Jun 2021 @ 10523m
30 Jun 2021 @ 1049 ini16h 33m
29 Jun 2021 @ 1816 ini1d 51m
28 Jun 2021 @ 17255m
28 Jun 2021 @ 1720 ini4h 11m
28 Jun 2021 @ 13094m
28 Jun 2021 @ 13053m
28 Jun 2021 @ 13029m
28 Jun 2021 @ 12535h 24m
28 Jun 2021 @ 07293m
28 Jun 2021 @ 072618h 43m
27 Jun 2021 @ 12434m
27 Jun 2021 @ 12393m
27 Jun 2021 @ 123610m
27 Jun 2021 @ 12264d 1h 29m
23 Jun 2021 @ 10573m
23 Jun 2021 @ 10545m
23 Jun 2021 @ 104919h 50m
22 Jun 2021 @ 14594m
22 Jun 2021 @ 14552m
22 Jun 2021 @ 145311m
22 Jun 2021 @ 14425h 50m
22 Jun 2021 @ 08523m
22 Jun 2021 @ 084911m
22 Jun 2021 @ 083811h 8m
21 Jun 2021 @ 21303m
21 Jun 2021 @ 21273m
21 Jun 2021 @ 2124 ini4d 2h 10m
17 Jun 2021 @ 19143m
17 Jun 2021 @ 1911 ini4h 47m
17 Jun 2021 @ 14244h 59m
17 Jun 2021 @ 09253m
17 Jun 2021 @ 092218h 26m
16 Jun 2021 @ 14565h 11m
16 Jun 2021 @ 09452m
16 Jun 2021 @ 0943 ini18h 42m
15 Jun 2021 @ 1501 ini5h 27m
15 Jun 2021 @ 09342m
15 Jun 2021 @ 09321d 1h 52m
14 Jun 2021 @ 07409h 15m
13 Jun 2021 @ 22253m
13 Jun 2021 @ 22227m
13 Jun 2021 @ 2215 ini8h 56m
13 Jun 2021 @ 13194h 36m
13 Jun 2021 @ 084322h 31m
12 Jun 2021 @ 10124h 55m
12 Jun 2021 @ 0517 ie9h 33m

Interval Statistics

Interval Count100
Min2m
Max5d 2h 17m
Mean10h 18m
Median11m
Initial-to-Initial
Interval Count15
Min5h 5m
Max7d 21h 33m
Mean2d 17h 23m
Median1d 9h 28m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
18634 24 Jul 2021 @ 0929 --- LynnS Boiled but did not erupt
18554 20 Jul 2021 @ 2011 --- Tara Boiled up, no eruption
18534 19 Jul 2021 @ 1635 --- Tara boiled up but did not erupt
18523 19 Jul 2021 @ 1101 --- steve Boiled but did not erupt
18470 16 Jul 2021 @ 2124 --- steve Boiled to 3-4 feet
18398 12 Jul 2021 @ 2052 --- William boiled and tried pretty hard to erupt for ~30s but did not
18376 11 Jul 2021 @ 1919 --- Tara low boil up, no eruption
18301 06 Jul 2021 @ 2127 06 Jul 2021 @ 2130 Tara low boiling, did not really try to erupt
18267 04 Jul 2021 @ 2118 --- Tara Weak boil up.
18268 04 Jul 2021 @ 2105 --- Tara Approximate time of first boil up prior to Fountain.
18251 02 Jul 2021 @ 2202 --- Tara boiled up, no eruption
18250 02 Jul 2021 @ 2152 --- Tara boiled up from below overflow
18249 02 Jul 2021 @ 2148 --- Tara boiled up from below overflow
18208 30 Jun 2021 @ 1046 --- Graham Boiled up.
18199 29 Jun 2021 @ 1820 29 Jun 2021 @ 1838 Tara Water level rose after 1816 eruption and pool boiled up several times between 1820 and 1828, but it did not erupt. After 1828 the boiling ended, but pool was full and overflowing into Morning until Fountain stopped at 1837. Water dropped out if sight at 1838.
18198 29 Jun 2021 @ 1813 --- Tara Filled and stayed full & boiling until 1816 eruption
17987 21 Jun 2021 @ 2118 --- Tara boiled up prior to Ftn start
17774 14 Jun 2021 @ 1122 --- LynnS Boiled up to ground level at 1120 but did not erupt with the 1115 eruption of Fountain.
17714 12 Jun 2021 @ 1016 12 Jun 2021 @ 1023 bbev MT continued to boil and "crown".
17633 09 Jun 2021 @ 1906 --- Tara boiled up, no eruption
17583 08 Jun 2021 @ 1347 --- Graham Boiled up before Fountain.
17584 08 Jun 2021 @ 1332 --- Graham Boiled up before Fountain. First pre-Fountain boil I have seen this trip.
17520 06 Jun 2021 @ 2053 --- Tara boiled up, no eruption
17496 05 Jun 2021 @ 2023 --- Tara boiled up, no eruption
17378 02 Jun 2021 @ 1332 --- Stephen_Gemar Boiled up, but no eruption.
17377 02 Jun 2021 @ 1322 --- Stephen_Gemar Small splashing seen in Thief.
17302 30 May 2021 @ 2311 --- Tara boiled up, no eruption
17299 30 May 2021 @ 1721 --- Tara boiled up, no eruption
17298 30 May 2021 @ 1111 --- Tara boiled up, no eruption
17105 16 May 2021 @ 1835 --- Tara boiled up, no eruption
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.