Last Known Eruption
3y 220d 3h 23m ago

Latest Eruptions

Eruption DurationInterval
13 Sep 2015 @ 10481d 21h 49m
11 Sep 2015 @ 125917m
11 Sep 2015 @ 124213m
11 Sep 2015 @ 12293d 2h 37m
08 Sep 2015 @ 095211m
08 Sep 2015 @ 09411d 7m
07 Sep 2015 @ 093412m
07 Sep 2015 @ 092232m
07 Sep 2015 @ 08501m 18s 14m
07 Sep 2015 @ 08361m 14s 9m
07 Sep 2015 @ 082755s 1d 22h 34m
05 Sep 2015 @ 095312m
05 Sep 2015 @ 0941 ie3d 23h 33m
01 Sep 2015 @ 10089m
01 Sep 2015 @ 09599m
01 Sep 2015 @ 09502d 41m
30 Aug 2015 @ 090915m
30 Aug 2015 @ 085411m
30 Aug 2015 @ 08439m
30 Aug 2015 @ 08341d 8h 26m
29 Aug 2015 @ 0008 ie1d 20h 21m
27 Aug 2015 @ 034711h 5m
26 Aug 2015 @ 164215m
26 Aug 2015 @ 162713m
26 Aug 2015 @ 161410m
26 Aug 2015 @ 160411m
26 Aug 2015 @ 1553 ini1d 5h 34m
25 Aug 2015 @ 10191m 24s 1d 16m
24 Aug 2015 @ 10031m 15s 13m
24 Aug 2015 @ 09503d 22h 44m
20 Aug 2015 @ 11062h 4m
20 Aug 2015 @ 0902:009m 45s
20 Aug 2015 @ 0852:1512m 50s
20 Aug 2015 @ 0839:2516m 7s
20 Aug 2015 @ 0823:189m 33s
20 Aug 2015 @ 0813:4513m 5s
20 Aug 2015 @ 0800:4011m 25s
20 Aug 2015 @ 0749:1511m 24s
20 Aug 2015 @ 0737:5113m 47s
20 Aug 2015 @ 0724:0410m
20 Aug 2015 @ 07143d 7h 39m
16 Aug 2015 @ 2335<1.5m 12m
16 Aug 2015 @ 232327m
16 Aug 2015 @ 2256~1m 45s 24m
16 Aug 2015 @ 2232~1m 18s 13m
16 Aug 2015 @ 2219<1.5m 10m
16 Aug 2015 @ 2209~1m 18s 13m
16 Aug 2015 @ 2156~1m 24s 12m
16 Aug 2015 @ 2144~1m 23s 14m
16 Aug 2015 @ 2130~1m 24s 12m
16 Aug 2015 @ 2118<1.5m 11m
16 Aug 2015 @ 2107<1.5m 10m
16 Aug 2015 @ 2057<1.5m 12m
16 Aug 2015 @ 2045<1.5m 9m
16 Aug 2015 @ 2036<1.5m 8m
16 Aug 2015 @ 2028 ini~1m 12s 1d 12h 8m
15 Aug 2015 @ 082016m
15 Aug 2015 @ 08048m
15 Aug 2015 @ 07569m
15 Aug 2015 @ 07471d 6h 56m
14 Aug 2015 @ 005113m
14 Aug 2015 @ 003813m
14 Aug 2015 @ 00259m
14 Aug 2015 @ 001616m
14 Aug 2015 @ 000018m
13 Aug 2015 @ 234210m
13 Aug 2015 @ 23329m
13 Aug 2015 @ 232310m
13 Aug 2015 @ 231313m
13 Aug 2015 @ 230012m
13 Aug 2015 @ 224826m
13 Aug 2015 @ 222239m
13 Aug 2015 @ 21431m 20s 18m
13 Aug 2015 @ 21251m 17s 9m
13 Aug 2015 @ 21161m 22s 10m
13 Aug 2015 @ 21069m
13 Aug 2015 @ 20579m
13 Aug 2015 @ 204813m
13 Aug 2015 @ 203512m
13 Aug 2015 @ 2023 ini4h 53m
13 Aug 2015 @ 1529:505h 12m
13 Aug 2015 @ 101712h 6m
12 Aug 2015 @ 221110m
12 Aug 2015 @ 22011m 13s 15m
12 Aug 2015 @ 214610m
12 Aug 2015 @ 21361m 16s 14m
12 Aug 2015 @ 21221m 19s 14m
12 Aug 2015 @ 21081m 17s 10m
12 Aug 2015 @ 205813m
12 Aug 2015 @ 204512m
12 Aug 2015 @ 20331h 3m
12 Aug 2015 @ 193015m
12 Aug 2015 @ 191510m
12 Aug 2015 @ 190511m
12 Aug 2015 @ 18542h 40m
12 Aug 2015 @ 1613:3513m 30s
12 Aug 2015 @ 1600:05 ini4h 51m 10s
12 Aug 2015 @ 1108:5511h 4m
12 Aug 2015 @ 00041m 17s 10m
11 Aug 2015 @ 23541m 16s 20m

Interval Statistics

Interval Count100
Min8m
Max3d 23h 33m
Mean7h 47m
Median13m
Initial-to-Initial
Interval Count3
Min1d 4h 22m
Max9d 19h 25m
Mean4d 15h 57m
Median3d 5m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10355 16 Sep 2018 @ 1246 --- Siegmund Bone dry.
6400 15 Sep 2017 @ 1145 --- TSBryan Burst of water 1 to 2 feet high from high vent.
6402 15 Sep 2017 @ 1120 --- TSBryan "Trying" to erupt. See Pebble Geyser notes.
5290 23 Aug 2017 @ 1131 --- imapayne gurgling and some spitting above the rim.
4258 07 Jun 2017 @ 2056 --- JSJ Gemini has visible, low, intermittent splashing/low spouting from BOTH vents - not kidding. This happened for about 0.5m from 2056 to 2057.
4184 02 Jun 2017 @ 1809 --- JSJ Gemini Geyser's basin was bone dry. Southeastern vent was damp/wet, with constant subterranean gurgling. Occasional visible very low spouting from southeastern vent.
3815 26 Oct 2016 @ 1100 --- DanS Noisy but no surface water.
3249 07 Jul 2016 @ 2020 07 Jul 2016 @ 2115 JSJ Subterranean gurgling from the southeastern vent.
2938 01 Jun 2016 @ 2040 01 Jun 2016 @ 2129 JSJ Subterranean gurgling. Pool and runoff channel dry.
2505 10 Oct 2015 @ 1207 10 Oct 2015 @ 1615 Siegmund Gemini empty and the formation bone dry every time I drove past today.
2131 16 Aug 2015 @ 1800 16 Aug 2015 @ 2028 JSJ Gemini crashes/drains from 1800 to 2028.
2140 15 Aug 2015 @ 1937 15 Aug 2015 @ 2040 JSJ Seven Gemini crashes/drains from 1937 to 2040 - at 1937, 1948, 1959, 2010, 2025, 2032, and 2040.
2119 14 Aug 2015 @ 0059 --- JSJ Crash/drain at 0059.
2118 14 Aug 2015 @ 0045 --- JSJ Crash/drain at 0045.
2117 13 Aug 2015 @ 2223 13 Aug 2015 @ 2248 JSJ Crash/drain between 2223 and 2248.
2116 13 Aug 2015 @ 2159 13 Aug 2015 @ 2222 JSJ Crashes/drains from 2159 to 2222.
2114 13 Aug 2015 @ 2133 --- JSJ Crash/drain at 2133.
2108 12 Aug 2015 @ 2219 12 Aug 2015 @ 2232 JSJ Two Gemini Geyser crashes/drains - at 2219 & 2232.
2105 12 Aug 2015 @ 1931 12 Aug 2015 @ 2033 JSJ Gemini Geyser crashes/drains from 1931 to 2033.
2095 12 Aug 2015 @ 0015 --- JSJ Gemini Geyser crash/drain at 0015.
2094 11 Aug 2015 @ 2342 --- JSJ Gemini Geyser crash/drain at 2342.
2093 11 Aug 2015 @ 2300 11 Aug 2015 @ 2310 JSJ Two Gemini Geyser crashes/drains - at 2300 and 2310.
2092 11 Aug 2015 @ 2207 --- JSJ Gemini Geyser crash/drain from a below-half filled pool & bouncing northwestern vent.
2091 11 Aug 2015 @ 2130 11 Aug 2015 @ 2146 JSJ Three Gemini Geyser crashes/drains at 2130, 2136, and 2146.
2090 11 Aug 2015 @ 1949 11 Aug 2015 @ 2040 JSJ Four Gemini Geyser crashes/drains between 1949 & 2040. Directly observed crashes at 2005, 2016, and ~~2030. Was another crash between 1949 & 2005.
2075 09 Aug 2015 @ 2128 09 Aug 2015 @ 2150 JSJ Gemini crashes/drains at 2128 & before 2150, when an eruption occurred.
2064 08 Aug 2015 @ 2058 --- JSJ Crash/drain from a Gemini Geyser full pool & both vents in very low spouting.
2063 08 Aug 2015 @ 2040 --- JSJ Crash/drain from a Gemini Geyser full pool & both vents in very low spouting.
2061 08 Aug 2015 @ 1857 08 Aug 2015 @ 1931 JSJ Crashes/drains from a Gemini Geyser full pool & both vents in very low spouting at 1857, 1907, 1919, and 1931.
2477 08 Aug 2015 @ 1557 08 Aug 2015 @ 1715 JSJ Gemini crash/drain events noticed at 1557, 1639, and 1715.
2053 08 Aug 2015 @ 1202 08 Aug 2015 @ 1236 JSJ Four Gemini Geyser crashes/drains from full pool & both vents in very low spouting at 1202, 1212, 1224, and 1236.
2048 07 Aug 2015 @ 2220 07 Aug 2015 @ 2243 JSJ Gemini crashes/drains at 2220 & 2231 & 2243.
2047 07 Aug 2015 @ 2156 --- JSJ Gemini crash/drain at 2156.
2046 07 Aug 2015 @ 2118 --- JSJ Gemini crash/drain at 2118.
2045 07 Aug 2015 @ 2107 --- JSJ Gemini crash/drain at 2107.
2036 06 Aug 2015 @ 2054 --- JSJ Crash/drain at 2054 between the 4th and 5th eruptions of a Gemini series from 2008 to 2106.
1918 14 Jul 2015 @ 0820 14 Jul 2015 @ 1345 LynnS I left Gemini at 0820 and did not return until 1345, so did not have it under observation during this time.
1852 06 Jul 2015 @ 1836 06 Jul 2015 @ 1914 JSJ Gemini Geyser engaged in preplay & basin filling, but drained instead of erupting - observed at 1836 & 1900 & 1914.
1826 02 Jul 2015 @ 1326 --- Graham Gemini drained 1326, had a series during Fountains eruption, Pebble was high before Fountain and low afterwards.
1659 28 May 2015 @ 1845 28 May 2015 @ 2238 LynnS I left Gemini at 1640 after the series that started at 1531 ended. When I returned at 1845 Pebble's water level was above the west crack, but still below the orange rock we have been using to measure water levels. The height of Pebble's water indicated Gemini had not erupted while I was gone. Over the next hour Pebble's water level slowly rose until it went into overflow at 1948. When I left t 22:38 Gemini had still not yet erupted.
1640 25 May 2015 @ 2035 --- Gilbert Great double rainbow arched over Gemini when it finished its series
1194 02 Sep 2014 @ 2220 --- Micah Kipple Evil vent was erulting when i drove by @ 2220ish however pebble spring was still full so perhaps i just missed another series
1798 14 Sep 2010 @ 0000 --- LynnS I saw one Gemini series on 9/14 with intervals of 8-10 minutes.
1797 01 Sep 2010 @ 0000 --- LynnS Gemini was active at about 0630
1796 31 Aug 2010 @ 1200 --- LynnS Gemini was active around noon.
1795 08 Aug 2010 @ 0000 --- LynnS Steve Eide saw Gemini erupt on 8/8/2010
1794 07 Aug 2010 @ 0000 --- LynnS Steve Eide saw Gemini on 8/7.
1793 02 Aug 2010 @ 0000 --- LynnS Jim Scheir caught a series of Gemini on 8/2/2010
1807 29 May 2010 @ 1150 29 May 2010 @ 1207 LynnS Gemini's "right" vent was active 1153-1158, 1200-1203, 1204-1205, 1206-1207
EntrySourceLinkComment
16 Aug 2015 @ 2107 JSJ https://www.flickr.com/photos/jsjgeology/21877465478 Photo (1 of 2) of Gemini Geyser's 9:07 to 9:09 PM eruption on 16 August 2015.
12 Aug 2015 @ 2146 JSJ https://www.flickr.com/photos/jsjgeology/22075260941 Photo (1 of 2) of Gemini Geyser's 9:46 to 9:48 PM eruption on 12 August 2015.
08 Aug 2015 @ 1848 JSJ https://www.flickr.com/photos/jsjgeology/21442161734 Photo (1 of 7) of Gemini Geyser's 6:48 to 6:49 PM eruption on 8 August 2015.
08 Aug 2015 @ 1725 JSJ https://www.flickr.com/photos/jsjgeology/22038747286 Photo (1 of 2) of Gemini Geyser's 5:25 to 5:26 PM eruption on 8 August 2015.
08 Aug 2015 @ 1150 JSJ https://www.flickr.com/photos/jsjgeology/21442081484 Photo (1 of 11) of Gemini Geyser's 11:59 to 11:51 AM eruption on 8 August 2015.
08 Aug 2015 @ 1127 JSJ https://www.flickr.com/photos/jsjgeology/22052373902 Photo (1 of 5) of Gemini Geyser's 11:27 to 11:29 AM eruption on 8 August 2015.
11 Jul 2015 @ 1952 JSJ https://www.flickr.com/photos/jsjgeology/21181474945 Photo (1 of 9) of Gemini Geyser's 7:52 to 7:53 PM eruption on 11 July 2015.
09 Jul 2015 @ 1848 JSJ https://www.flickr.com/photos/jsjgeology/20646080688 Photo (1 of 5) of Gemini Geyser's 6:48 to 6:49 PM eruption on 9 July 2015.
09 Jul 2015 @ 1838 JSJ https://www.flickr.com/photos/jsjgeology/20827532725 Photo (1 of 7) of Gemini Geyser's 6:38 to 6:39 PM eruption on 9 July 2015.
06 Jul 2015 @ 1823 JSJ https://www.flickr.com/photos/jsjgeology/19824233380 Photo (1 of 14) of Gemini Geyser's 6:23 to 6:24 PM eruption on 6 July 2015.
13 Aug 2014 @ 2153 JSJ https://www.flickr.com/photos/jsjgeology/15428408631 Photo (1 of 3) of Gemini Geyser's 9:53 to 9:54 PM eruption on 13 August 2014.
03 Jul 1992 @ 1835 JSJ https://www.youtube.com/watch?v=xjjlBEF62OQ Video of Gemini Geyser's 6:35 to 6:36 PM eruption on 3 July 1992.
Baseline does not exist.


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