Last Known Eruption
2d 14h 50m ago

Latest Eruptions

Eruption DurationInterval
14 Oct 2021 @ 10503d 40m
11 Oct 2021 @ 10103m
11 Oct 2021 @ 10077d 20h 48m
03 Oct 2021 @ 13193m
03 Oct 2021 @ 13161d 16h 43m
01 Oct 2021 @ 20334m
01 Oct 2021 @ 2029 ini8h 36m
01 Oct 2021 @ 11533m
01 Oct 2021 @ 1150 ini1d 18h 18m
29 Sep 2021 @ 1732 ie5d 5h 16m
24 Sep 2021 @ 12163m
24 Sep 2021 @ 1213 ini20h 47m
23 Sep 2021 @ 15262m
23 Sep 2021 @ 1524 ini4h 45m
23 Sep 2021 @ 10392m
23 Sep 2021 @ 1037 ini2d 15h 26m
20 Sep 2021 @ 19114m
20 Sep 2021 @ 19075h 13m
20 Sep 2021 @ 1354 ini5h 51m
20 Sep 2021 @ 08033m
20 Sep 2021 @ 0800 ini14h 4m
19 Sep 2021 @ 17563m
19 Sep 2021 @ 1753 ini4d 3h 50m
15 Sep 2021 @ 1403 ini1d 19m
14 Sep 2021 @ 13443m
14 Sep 2021 @ 1341 ini4h 45m
14 Sep 2021 @ 08565m
14 Sep 2021 @ 08513m
14 Sep 2021 @ 0848 ini16h 33m
13 Sep 2021 @ 1615 ini5h 33m
13 Sep 2021 @ 1042 ini18h 39m
12 Sep 2021 @ 16033m
12 Sep 2021 @ 1600 ini5h 18m
12 Sep 2021 @ 10424m
12 Sep 2021 @ 10383m
12 Sep 2021 @ 10352d 2h 6m
10 Sep 2021 @ 08292m
10 Sep 2021 @ 082713h 39m
09 Sep 2021 @ 18484m
09 Sep 2021 @ 1844 ini4h 30m
09 Sep 2021 @ 14143m
09 Sep 2021 @ 1411 ini19h 39m
08 Sep 2021 @ 18324h 40m
08 Sep 2021 @ 13523m
08 Sep 2021 @ 13494d 17h 45m
03 Sep 2021 @ 20043m
03 Sep 2021 @ 2001 ini4h 53m
03 Sep 2021 @ 15082m
03 Sep 2021 @ 1506 ini4h 47m
03 Sep 2021 @ 10193m
03 Sep 2021 @ 1016 ini2d 1h 39m
01 Sep 2021 @ 08373m
01 Sep 2021 @ 0834 ini9h 18m
31 Aug 2021 @ 23164m
31 Aug 2021 @ 231211m
31 Aug 2021 @ 2301 ini9h 15m
31 Aug 2021 @ 13463m
31 Aug 2021 @ 13435h 15m
31 Aug 2021 @ 08283m
31 Aug 2021 @ 0825 ini1d 14h 9m
29 Aug 2021 @ 18162m
29 Aug 2021 @ 1814 ini5h 10m
29 Aug 2021 @ 1304 ini4h 32m
29 Aug 2021 @ 08324m
29 Aug 2021 @ 0828 ini2d 16h 54m
26 Aug 2021 @ 153416m
26 Aug 2021 @ 15185h 48m
26 Aug 2021 @ 09303m
26 Aug 2021 @ 092716h 7m
25 Aug 2021 @ 17202m
25 Aug 2021 @ 17185h 13m
25 Aug 2021 @ 12052m
25 Aug 2021 @ 12034h 42m
25 Aug 2021 @ 07214m
25 Aug 2021 @ 07171d 14h 1m
23 Aug 2021 @ 17164m
23 Aug 2021 @ 17125m
23 Aug 2021 @ 17071d 1h 23m
22 Aug 2021 @ 15441d 19h 34m
20 Aug 2021 @ 201057m
20 Aug 2021 @ 19134h 10m
20 Aug 2021 @ 15034m
20 Aug 2021 @ 145911m
20 Aug 2021 @ 14486d 20h 30m
13 Aug 2021 @ 1818 ini1d 9h 9m
12 Aug 2021 @ 09093m
12 Aug 2021 @ 09061d 13h 5m
10 Aug 2021 @ 20014m
10 Aug 2021 @ 1957 ini4h 52m
10 Aug 2021 @ 15051d 17h 38m
08 Aug 2021 @ 21274m
08 Aug 2021 @ 21233m
08 Aug 2021 @ 2120 ini5d 12h 26m
03 Aug 2021 @ 08545m
03 Aug 2021 @ 084920h 34m
02 Aug 2021 @ 121514h 11m
01 Aug 2021 @ 22043m
01 Aug 2021 @ 220111m
01 Aug 2021 @ 2150 ini5h 6m
01 Aug 2021 @ 16446m

Interval Statistics

Interval Count100
Min2m
Max7d 20h 48m
Mean17h 42m
Median4h 31m
Initial-to-Initial
Interval Count28
Min4h 33m
Max15d 14h 10m
Mean2d 4h 14m
Median17h 37m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
19719 24 Sep 2021 @ 1207 --- SteveO Boiled up, no eruption.
19665 20 Sep 2021 @ 1349 --- Graham Splashy boil.
19536 13 Sep 2021 @ 1053 --- Graham Big boil
19406 09 Sep 2021 @ 1425 09 Sep 2021 @ 1428 Graham Boiled up, 15m after Fountain. Looked more like a small vertical eruption rather than the rounded boil it usually does.
19405 09 Sep 2021 @ 1406 --- Graham Water visible in MT. Just moved to the overlook so it might have been visible earlier. 4min before Fountain erupted.
19264 03 Sep 2021 @ 2008 --- Tara boiled up, no eruption
19181 31 Aug 2021 @ 0815 --- Graham Boiled up before Fountain.
19023 23 Aug 2021 @ 1707 --- William boiled to the crater rim but did not erupt.
18989 22 Aug 2021 @ 1546 22 Aug 2021 @ 1555 minissa Maintained a full, bubbling pool for most of this time, but if there was a follow-up eruption, the steam from Fountain and Clepsydra obscured it.
18970 20 Aug 2021 @ 2018 --- minissa Bubbled up but did not erupt
18969 20 Aug 2021 @ 2006 --- minissa Bubbled up but did not erupt
18757 31 Jul 2021 @ 0639 --- LynnS Boiled up about 3 feet above ground but did not erupt
18658 25 Jul 2021 @ 1051 --- LynnS Boiled but did not erupt
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.
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.