Last Known Eruption
1d 2h 35m ago

Latest Eruptions

Eruption DurationInterval
15 Jun 2019 @ 1958 ie wc2d 9h 28m
13 Jun 2019 @ 1030 ? A13h 36m
12 Jun 2019 @ 205424m 1d 13h 50m
11 Jun 2019 @ 0704 ie wc1d 13h 15m
09 Jun 2019 @ 1749 ie3d 10h 13m
06 Jun 2019 @ 0736 ie wc20h 58m
05 Jun 2019 @ 1038 ie wc22h 18m
04 Jun 2019 @ 1220 ie21h 59m
03 Jun 2019 @ 142127.5m 20h 54m
02 Jun 2019 @ 1727 ie2d 4h 23m
31 May 2019 @ 130420m 20h 24m
30 May 2019 @ 1640151d 2h 51m
29 May 2019 @ 134918m 16h 41m
28 May 2019 @ 2108 ns5d 16h 37m
23 May 2019 @ 0431 ns wc4d 10h 43m
18 May 2019 @ 174821m 23h 32m
17 May 2019 @ 1816 ie21h 30m
16 May 2019 @ 2046 ie wc14h 41m
16 May 2019 @ 0605 ie wc20h 31m
15 May 2019 @ 0934 ie wc21h 21m
14 May 2019 @ 1213 ie15h 2m
13 May 2019 @ 2111 ie3d 11h 18m
10 May 2019 @ 0953 ie1d 21h 18m
08 May 2019 @ 1235 ns wc21h 51m
07 May 2019 @ 1444 ie wc1d 1h 56m
06 May 2019 @ 1248 ie wc22h 0m
05 May 2019 @ 1448 ie wc6d 59m
29 Apr 2019 @ 1349 ie5d 2h 47m
24 Apr 2019 @ 1102 ie wc17h 0m
23 Apr 2019 @ 1802 ie wc3d 6h 39m
20 Apr 2019 @ 1123 ie wc4d 17h 33m
15 Apr 2019 @ 1750 ie wc>20m 66d 4h 24m
08 Feb 2019 @ 1226 ie18d 21h 54m
20 Jan 2019 @ 1432 ie72d 50m
09 Nov 2018 @ 1342 ie24d 20m
16 Oct 2018 @ 1422 ie1d 5h 17m
15 Oct 2018 @ 0905 ie9d 20h 40m
05 Oct 2018 @ 1225 ie21h 13m
04 Oct 2018 @ 1512 ie20h 5m
03 Oct 2018 @ 1907 ie19h 7m
03 Oct 2018 @ 0000 A13h 40m
02 Oct 2018 @ 1020 ns1d 8h 20m
01 Oct 2018 @ 0200 A19h 0m
30 Sep 2018 @ 0700 A19h 59m
29 Sep 2018 @ 110123m 16h 37m
28 Sep 2018 @ 1824 ns17h 54m
28 Sep 2018 @ 0030 A13h 5m
27 Sep 2018 @ 112521m 16h 9m
26 Sep 2018 @ 1916 ie1d 19h 16m
25 Sep 2018 @ 0000 A1d 21h 30m
23 Sep 2018 @ 0230 A14h 27m
22 Sep 2018 @ 120325m 20h 35m
21 Sep 2018 @ 152818m 13h 58m
21 Sep 2018 @ 0130 A15h 37m
20 Sep 2018 @ 095321m 18h 53m
19 Sep 2018 @ 1500 A13h 30m
19 Sep 2018 @ 0130 A16h 49m
18 Sep 2018 @ 0841 ie22h 11m
17 Sep 2018 @ 1030 A1d 1h 5m
16 Sep 2018 @ 0925 ie>18m 19h 23m
15 Sep 2018 @ 140224m 20h 50m
14 Sep 2018 @ 1712 ie2d 11h 12m
12 Sep 2018 @ 0600 A19h 33m
11 Sep 2018 @ 102716h 3m
10 Sep 2018 @ 1824 ie2d 10h 28m
08 Sep 2018 @ 0756 ie1d 22h 11m
06 Sep 2018 @ 094527m 22h 44m
05 Sep 2018 @ 110121m 19h 46m
04 Sep 2018 @ 151524m 22h 3m
03 Sep 2018 @ 17123d 9h 48m
31 Aug 2018 @ 0724 ie22h 17m
30 Aug 2018 @ 0907 ie1d 18h 10m
28 Aug 2018 @ 145724m 1d 2h 1m
27 Aug 2018 @ 1256 ie1d 19h 16m
25 Aug 2018 @ 1740 ie2d 1h 39m
23 Aug 2018 @ 160121m 2d 4h 54m
21 Aug 2018 @ 1107 ie1d 21h 46m
19 Aug 2018 @ 1321 ie3d 17h 1m
15 Aug 2018 @ 2020 ie1d 8h 58m
14 Aug 2018 @ 112220h 43m
13 Aug 2018 @ 143928m 19h 36m
12 Aug 2018 @ 1903 ie1d 10h 34m
11 Aug 2018 @ 0829 ie3d 18h 28m
07 Aug 2018 @ 140122m 7d 2h 23m
31 Jul 2018 @ 1138 ie1d 3h 28m
30 Jul 2018 @ 0810 ie1d 21h 17m
28 Jul 2018 @ 10531d 14h 39m
26 Jul 2018 @ 2014 ie1d 6h 49m
25 Jul 2018 @ 132518m 2d 5h 51m
23 Jul 2018 @ 0734 ie19h 37m
22 Jul 2018 @ 115725m 1d 19m
21 Jul 2018 @ 113825m 23h 13m
20 Jul 2018 @ 122524m 1d 52m
19 Jul 2018 @ 113324m 2d 5h 13m
17 Jul 2018 @ 0620 ie15h 32m
16 Jul 2018 @ 144821m 19h 8m
15 Jul 2018 @ 194022m 1d 9h 3m
14 Jul 2018 @ 103726m 1d 1h 47m
13 Jul 2018 @ 0850 ie1d 14h 50m
11 Jul 2018 @ 180029m 22h 13m

Interval Statistics

Interval Count100
Min13h 5m
Max72d 50m
Mean3d 9h 36m
Median1d 35m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
11808 15 Jun 2019 @ 0920 --- William Pool 2-3 inches below overflow.
11795 14 Jun 2019 @ 1800 14 Jun 2019 @ 2100 William heavy overflow when I arrived. no eruption.
11781 14 Jun 2019 @ 1010 --- Choward Not in overflow. Just starting to spill into basins on south side of the crater.
11764 13 Jun 2019 @ 1605 13 Jun 2019 @ 1615 William in light overflow.
11763 13 Jun 2019 @ 1318 --- Suzanne pool 1 foot below overflow
11751 12 Jun 2019 @ 1815 12 Jun 2019 @ 2045 William Upon first arrival the pool had risen since my earlier observation and was putting heavy water out of the front of the pool. moderate runoff down the right channel. Increased boil area throughout observation. Another beautiful sunset at Arti.
11743 12 Jun 2019 @ 1300 12 Jun 2019 @ 1355 William Pool full... light overflow. Slight improvement in water level and boil by end of observation.
11730 11 Jun 2019 @ 2010 11 Jun 2019 @ 2045 William pool full upon arrival with very little runoff in any direction. water level up considerably by 20:30 and overflowing out of the back two channels. very little water down the right runoff channel.
11720 10 Jun 2019 @ 1715 10 Jun 2019 @ 2110 William No eruption. pool in overflow when I arrived.
11668 08 Jun 2019 @ 1900 08 Jun 2019 @ 1950 William No eruption. In overflow.
11647 08 Jun 2019 @ 1315 --- William in light overflow.
11502 02 Jun 2019 @ 1130 02 Jun 2019 @ 1145 William Pool is full and sending water into the exterior formations. Little to no water runoff out of either back channel.
11485 01 Jun 2019 @ 1515 01 Jun 2019 @ 2100 William No eruption. Pool in heavy overflow out of both back runoff channels.
11465 01 Jun 2019 @ 0757 --- Mike C foot below overflow
11427 30 May 2019 @ 1100 --- William Pool not in overflow.
11423 30 May 2019 @ 0711 --- Mike C pool down about foot below overflow
11414 29 May 2019 @ 1041 --- EricZ very light overflow
10559 05 Oct 2018 @ 0745 --- William Pool full and in light overflow.
10474 25 Sep 2018 @ 2000 26 Sep 2018 @ 0000 ThomasR Had an overnight eruption sometime before midnight. Pool already overflowing and Little Italy already full when we arrived at 0830.
10452 25 Sep 2018 @ 1915 25 Sep 2018 @ 1950 William In heavy overflow.
10422 24 Sep 2018 @ 1900 24 Sep 2018 @ 1930 William In heavy overflow.
10421 24 Sep 2018 @ 1800 --- ThomasR No eruption yet when we left at 1800 Sep 24.
10420 23 Sep 2018 @ 1800 24 Sep 2018 @ 0000 ThomasR Had an eruption overnight between 1800 and 0000. No eruption yet when we left at 1800 Sep 23. Pool full and overflowing when we arrived at 0800 Sep 24.
10301 19 Sep 2018 @ 1640 --- Tara About 18 inches below overflow.
10055 06 Sep 2018 @ 0833 --- EmilyW Did not erupt overnight. Pool full and overflowing
9975 01 Sep 2018 @ 0715 --- RMichaels Full and overflowing.
9698 13 Aug 2018 @ 1340 --- minissa In OF. At high end of cycle, horseshoe fairly well covered, although not completely. Trickle of water into middle OF channel R side of formation
9495 06 Aug 2018 @ 1440 --- Stephen_Gemar Not quite in overflow.
8591 08 Jun 2018 @ 0555 08 Jun 2018 @ 1620 LynnS Artemisia overflow was audible in both channels and heavy steam in the runoff channel that goes over the brink of the hill when I arrived. Conditions were still the same when I left at 1620.
8387 01 Jun 2018 @ 1444 --- EricZ pool full, but not overflowing
8364 31 May 2018 @ 0848 --- donnielg Big steam cloud seen from Daisy at 08:48.
8356 30 May 2018 @ 1900 --- Mike C pool down about 4 feet
8346 30 May 2018 @ 0746 --- B**2 About 1 ft below overflow.
7982 21 Apr 2018 @ 1215 --- RMichaels Pool full and in overflow.
7976 20 Apr 2018 @ 1630 20 Apr 2018 @ 1700 RMichaels In overflow.
6330 13 Sep 2017 @ 0756 --- Mike C pool down about 1 foot
6288 12 Sep 2017 @ 0734 --- Mike C Just about to overflow
6247 09 Sep 2017 @ 2105 --- Dave W Still full and overflowing when I left at 2105. No eruption yet.
6174 09 Sep 2017 @ 1145 --- Dave W In overflow
5883 06 Sep 2017 @ 0655 --- RMichaels Artemisia is full and overflowing, but appears to have erupted sometime overnight.
5879 05 Sep 2017 @ 1835 --- RMichaels In overflow.
5797 05 Sep 2017 @ 0638 --- RMichaels Pool about 2.5 feet below overflow. Appears to have erupted recently.
5684 04 Sep 2017 @ 0654 --- RMichaels 6 inches below overflow.
5677 03 Sep 2017 @ 1541 --- JudyS full with overflow
5571 02 Sep 2017 @ 0918 --- c.barwin post eruptive... about a foot below the rim.
5455 27 Aug 2017 @ 1251 --- LotusBaker duration 22 minutes
5300 24 Aug 2017 @ 0814 --- Jake high water. strong audible upwelling of bubbles. all signs pointing to yes. didn't erupt
4591 01 Aug 2017 @ 0753 --- EmilyW Pool is down about 6 inches, erupted recently
4329 17 Jun 2017 @ 1131 --- B**2 Full & Overflow
4319 15 Jun 2017 @ 0710 --- B**2 Looks like inch or less from overflow.
4294 11 Jun 2017 @ 1036 --- B**2 About 1-2" below full.
4215 05 Jun 2017 @ 0725 --- B**2 Pool about 4" below full.
4200 04 Jun 2017 @ 0747 --- EmilyW Pool is full and overflowing
4174 02 Jun 2017 @ 1219 --- Stephen_Gemar Artemisia was in overflow when I arrived at 12:10
4166 01 Jun 2017 @ 0755 --- B**2 Very close, but not yet in overflow.
4159 31 May 2017 @ 1513 --- Archer 2-3 inches down.
4074 08 May 2017 @ 1427 --- Archer Recently post-eruptive. Down a little over a foot.
3808 25 Oct 2016 @ 1300 --- DanS Post eruptive. Pool down
3734 01 Oct 2016 @ 1455 --- Ajw Pool very full. Frequent bubbling.
3699 20 Sep 2016 @ 0830 20 Sep 2016 @ 1830 ThomasR No Artemisia eruption! Pool was in good overflow all the time. The only thing we saw was a bison, a coyote and Atomizer.
3688 19 Sep 2016 @ 0920 --- ThomasR Likely had an eruption overnight before 0130 A. Was in good overflow at 0920.
3676 16 Sep 2016 @ 0945 --- ThomasR Likely had an eruption overnight around 0200 A. Was in decent overflow at 0945.
3662 14 Sep 2016 @ 0930 --- ThomasR Likely had an eruption overnight around 0230 A. Was in early overflow at 0930.
3652 12 Sep 2016 @ 0945 --- ThomasR Likely had an eruption overnight before 0230 A. Was in good overflow at 0945.
3626 08 Sep 2016 @ 1800 --- ThomasR Probably no eruption between 0930 and 1800. Still in a good overflow.
3625 08 Sep 2016 @ 0930 --- ThomasR Likely had an eruption overnight around 0230 A. Was in a decent overflow at 0930.
3620 07 Sep 2016 @ 1840 --- ThomasR Probably no eruption between 0915 and 1840. Still in a good overflow.
3618 07 Sep 2016 @ 0915 --- ThomasR Likely had an eruption overnight before 0115 A. Was in good overflow at 0915.
3617 06 Sep 2016 @ 1800 --- ThomasR No eruption between 1130 and 1800. Still in a good overflow.
3619 06 Sep 2016 @ 1130 --- ThomasR Likely had an eruption overnight before 0330 A. Was in good overflow at 1130.
3432 06 Aug 2016 @ 0916 --- EmilyW Post eruptive
3336 21 Jul 2016 @ 1010 --- Devin C. Pool is full and overflowing.
3134 25 Jun 2016 @ 0600 --- LynnS Artemisia was a few inches below overflow when I arrived at 0600; estimated eruption midnight to 3 am for 34-36 hour interval.
3098 20 Jun 2016 @ 0741 --- B**2 Pool about 1 foot below overflow.
3057 12 Jun 2016 @ 0910 12 Jun 2016 @ 0916 RLJones Pool in light overflow. water in runoff for entire length of both channels. no boils over vents.
3041 10 Jun 2016 @ 1041 10 Jun 2016 @ 1700 JSJ Artemisia Geyser in overflow from late morning to late afternoon. No eruption yet.
2391 20 Sep 2015 @ 1341 --- udo Post eruptive low pool. Still actively running off.
2346 14 Sep 2015 @ 1700 14 Sep 2015 @ 1721 Jake pull full, but not pushing
2256 04 Sep 2015 @ 1020 04 Sep 2015 @ 1101 RLJones Pool in overflow entire time.
2071 09 Aug 2015 @ 1006 --- RLJones Pool full & in overflow. Pool calm.
1598 16 May 2015 @ 1208 16 May 2015 @ 1906 JSJ Watched Artemisia's pool after its 1141 to 1208 eruption. By 1906, the platform was partially flooded, but no overflow into runoff channels yet.
1549 01 May 2015 @ 1527 --- RLJones Pool appr. 4ft below overflow.
1432 04 Oct 2014 @ 1452 --- WillBoekel full and overflowing at 1452
1234 14 Sep 2014 @ 0800 --- WillBoekel full and overflowing at 0800
1121 02 Aug 2014 @ 0727 --- c.barwin Artemisia was observed to be approximately 5-6 ft below the crater rim at 0727.
425 09 Sep 2012 @ 0715 --- Graham Low pool at 0715
422 03 Sep 2012 @ 1200 --- WillBoekel Was called some time around 1200 but missed the exact time called over the radio
343 27 Jun 2012 @ 1015 27 Jun 2012 @ 1315 WillBoekel \"The pool was full and\r\noverflowing from 1015-1315 today.\"
285 14 Jun 2012 @ 0900 --- colopho Erupted early am. Pool was low at 900 am\r\n
36 18 Sep 2011 @ 1712 --- Jake well below overflow @ 1712, erupted @ 1500?
1 15 Jul 2011 @ 1645 --- Jake pool very low @ 1645
1246 17 Jun 2007 @ 1011 17 Jun 2007 @ 1911 BoekelUpload 1x:11
6250 10 Sep 1992 @ 1130 --- JarnoO pool down 9"; before one of these 2 sightings D.L.
6249 10 Sep 1992 @ 0610 --- JarnoO pool 1.5' to 2' down; evidently there was a minor eruption
530 27 Apr 1977 @ 1500 --- BoekelUpload just full at 1500 (erupted ~1100?
EntrySourceLinkComment
16 May 2015 @ 1141 JSJ https://www.flickr.com/photos/jsjgeology/18179663412 Photo (1 of 19) of Artemisia Geyser's 11:41 AM to 12:08 PM eruption on 16 May 2015.
14 Aug 2014 @ 1154 JSJ https://www.flickr.com/photos/jsjgeology/15465524472 Photo (1 of 6) of Artemisia Geyser's 11:54 to 12:18 PM eruption on 14 August 2014.
01 Sep 2012 @ 1453 JSJ https://www.youtube.com/watch?v=GM2_GU13R0w Video by Will Boekel of Artemisia Geyser's 2:53 to 3:21 PM eruption on 1 September 2012.
14 Aug 2014 @ 1154 JSJ https://www.youtube.com/watch?v=qAQZfQVyU98 Video of Artemisia Geyser's 11:54 AM to 12:18 PM eruption on 14 August 2014.
16 May 2015 @ 1141 JSJ https://www.youtube.com/watch?v=s-NNSHy25Qw Video of Artemisia Geyser's 11:41 AM to 12:08 PM eruption on 16 May 2015.
21 Aug 2014 @ 2033 kcmule http://www.coloradobills.com/yellowstone/ART2033.08212014.flv
Baseline does not exist.


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