Last Known Eruption
3d 18h 29m ago

Latest Eruptions

Eruption DurationInterval
18 Oct 2019 @ 1802 ie wc1d 2h 59m
17 Oct 2019 @ 1503 ie wc2d 30m
15 Oct 2019 @ 1433 ie wc1d 5h 16m
14 Oct 2019 @ 0917 wc2d 20h 40m
11 Oct 2019 @ 1237 ie wc4d 3h 0m
07 Oct 2019 @ 0937 ie wc1d 11h 53m
05 Oct 2019 @ 2144 ? ie wc1d 6h 14m
04 Oct 2019 @ 1530 ie1d 2h 21m
03 Oct 2019 @ 130934m 26s 1d 8h 9m
02 Oct 2019 @ 0500 A15h 46m
01 Oct 2019 @ 1314 ie1d 21h 29m
29 Sep 2019 @ 1545 A1d 2h 18m
28 Sep 2019 @ 132721m 18h 17m
27 Sep 2019 @ 191026m 28s 1d 11h 5m
26 Sep 2019 @ 0805 ie14h 37m
25 Sep 2019 @ 172823m 17s 3d 10h 47m
22 Sep 2019 @ 0641 ? ie wc17h 42m
21 Sep 2019 @ 125925m 1d 17m
20 Sep 2019 @ 1242 ie wc19h 45m
19 Sep 2019 @ 165728m 10s 1d 54m
18 Sep 2019 @ 160327m 2s 21h 56m
17 Sep 2019 @ 180728m 12s 1d 2h 0m
16 Sep 2019 @ 1607 ie14h 58m
16 Sep 2019 @ 0109 ? ie wc15h 30m
15 Sep 2019 @ 0939 ie15h 0m
14 Sep 2019 @ 183924m 17h 39m
14 Sep 2019 @ 0100 A14h 45m
13 Sep 2019 @ 1015 ie15h 3m
12 Sep 2019 @ 191227m 31s 1d 11h 12m
11 Sep 2019 @ 0800 A1d 16h 0m
09 Sep 2019 @ 1600 ie wc14h 0m
09 Sep 2019 @ 0200 A15h 32m
08 Sep 2019 @ 102824m 40s 17h 21m
07 Sep 2019 @ 170721m 9s 17h 50m
06 Sep 2019 @ 231724m 21h 47m
06 Sep 2019 @ 0130 A16h 20m
05 Sep 2019 @ 091023m 16s 23h 9m
04 Sep 2019 @ 100123m 20s 17h 49m
03 Sep 2019 @ 1612 ie12h 42m
03 Sep 2019 @ 0330 A1d 7h 48m
01 Sep 2019 @ 194223m 1d 11h 45m
31 Aug 2019 @ 075724m 22s 1d 9m
30 Aug 2019 @ 074822m 4s 19h 49m
29 Aug 2019 @ 115924m 19h 3m
28 Aug 2019 @ 165625m 23h 14m
27 Aug 2019 @ 1742 ie1d 13h 42m
26 Aug 2019 @ 0400 A19h 7m
25 Aug 2019 @ 085325m 20h 18m
24 Aug 2019 @ 123523m 19h 51m
23 Aug 2019 @ 1644 ? ie2d 7h 16m
21 Aug 2019 @ 092826m 21h 51m
20 Aug 2019 @ 113721m 29s 22h 7m
19 Aug 2019 @ 1330 A17h 11m
18 Aug 2019 @ 201920m 1d 16h 9m
17 Aug 2019 @ 0410 A17h 28m
16 Aug 2019 @ 104226m 1d 13m
15 Aug 2019 @ 102932m 15s 21h 1m
14 Aug 2019 @ 132818m 15h 13m
13 Aug 2019 @ 2215 ie wc20h 53m
13 Aug 2019 @ 0122 ? ie wc22h 30m
12 Aug 2019 @ 0252 ? A16h 19m
11 Aug 2019 @ 1033 ? ie wc19h 35m
10 Aug 2019 @ 1458 ie wc7h 31m
10 Aug 2019 @ 0727 ? ie wc13h 11m
09 Aug 2019 @ 1816 ie3d 5h 41m
06 Aug 2019 @ 1235 ie21h 35m
05 Aug 2019 @ 1500~21m 1d 6h 14m
04 Aug 2019 @ 084621m 59s 22h 44m
03 Aug 2019 @ 100222m 27s 21h 29m
02 Aug 2019 @ 123324m 38s 21h 51m
01 Aug 2019 @ 144223m 26s 1d 3h 40m
31 Jul 2019 @ 1102 ie wc15h 33m
30 Jul 2019 @ 192918m 22h 52m
29 Jul 2019 @ 2037 ie wc1d 3h 28m
28 Jul 2019 @ 1709 ie wc1d 10h 7m
27 Jul 2019 @ 0702 ie18h 43m
26 Jul 2019 @ 121922m 22s 21h 11m
25 Jul 2019 @ 150820m 18h 5m
24 Jul 2019 @ 2103 ie3d 11h 27m
21 Jul 2019 @ 093621m 20h 15m
20 Jul 2019 @ 132117h 26m
19 Jul 2019 @ 195526m 2d 9h 50m
17 Jul 2019 @ 1005 ie wc1d 15h 20m
15 Jul 2019 @ 184519m 3d 9h 16m
12 Jul 2019 @ 092919m 12h 1m
11 Jul 2019 @ 2128 ie14h 45m
11 Jul 2019 @ 0643 ie wc19h 42m
10 Jul 2019 @ 1101 ie3d 2h 46m
07 Jul 2019 @ 081517m 11h 42m
06 Jul 2019 @ 2033 ie12h 32m
06 Jul 2019 @ 080125m 21h 31m
05 Jul 2019 @ 103029m 2d 25m
03 Jul 2019 @ 100524m 19h 20m
02 Jul 2019 @ 1445 ie wc10h 6m
02 Jul 2019 @ 0439 ie wc18h 53m
01 Jul 2019 @ 094622m 19h 47m
30 Jun 2019 @ 1359 ie wc1d 7h 50m
29 Jun 2019 @ 0609 ie wc21h 53m
28 Jun 2019 @ 0816 ie22h 39m
27 Jun 2019 @ 0937 ? wc1d 14h 34m

Interval Statistics

Interval Count100
Min7h 31m
Max4d 3h 0m
Mean1d 3h 35m
Median21h 41m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13850 03 Oct 2019 @ 0728 --- RMichaels Pool looks like it has been in overflow for some time. Italy is full.
13848 02 Oct 2019 @ 1230 --- William Italy still down 1"
13687 14 Sep 2019 @ 0815 --- ThomasR Pool in overflow, but Little Italy not quite full yet. Possibly erupted around 0100 A.
13670 12 Sep 2019 @ 0800 12 Sep 2019 @ 1845 ThomasR No eruption during this time.
13655 12 Sep 2019 @ 0800 --- ThomasR No overnight eruption yet, pool is still overflowing.
13564 05 Sep 2019 @ 0630 05 Sep 2019 @ 0730 William No overnight eruption. Pushed around 07:15 but no eruption yet.
13532 04 Sep 2019 @ 0628 --- G$ Overflowing with Italy full. Does not appear to have erupted overnight
13506 02 Sep 2019 @ 1400 02 Sep 2019 @ 1845 Michael No eruption yet.
13483 01 Sep 2019 @ 0825 --- deanl erupted overnight - I'm guessing about 04:00
13459 30 Aug 2019 @ 0715 --- William Pool in overflow, most likely no overnight eruption.
13413 27 Aug 2019 @ 1000 --- ThomasR Had an overnight eruption. Pool was already in overflow, Little Italy was full, some other smaller pools weren’t full yet.
13353 22 Aug 2019 @ 1915 22 Aug 2019 @ 2100 William Pool full and water level high.
13345 22 Aug 2019 @ 0645 --- William Had overnight eruption. Pool is full, Italy 1 inch below rim.
13321 20 Aug 2019 @ 0710 20 Aug 2019 @ 0740 William Pool is high with gooseneck covered on pushes.
13304 18 Aug 2019 @ 0804 --- deanl Italy low and overflow into the "Creek". I'm guessing 02;00
13294 17 Aug 2019 @ 0414 --- JoeN looks to be in eruption, steam still seen as Grand erupted at 0424
13278 16 Aug 2019 @ 0605 --- RMichaels Pool is in high overflow.
13239 14 Aug 2019 @ 1655 --- minissa First OF . By which we mean first OF into pool on left of formation that is below pool shaped like a rough pentagon. Very close to OF into trapezoid pool next to horseshoe. End of Artemesia was 1346, so 3 hours 9 minutes from end of eruption to first OF, 3 hours 27 minutes from start of eruption to first OF. Hoping we can get a closed interval and compare OF length to total interval length. We have photos documenting progress low water to OF, will post
13232 14 Aug 2019 @ 1309 --- minissa Arrived about 20 minutes ago to find horseshoe and gooseneck well covered, some bubbles from point and to right of point
13221 13 Aug 2019 @ 2105 --- RMichaels Pool had been high for 30 min. before I left due to darkness. No eruption yet.
13200 12 Aug 2019 @ 2055 --- RMichaels Pool overflowing and cycling. No eruption yet.
13193 12 Aug 2019 @ 1615 12 Aug 2019 @ 1655 William nice overflow and runoff down back channels. Had two decent pushes that covered horseshoe and wet but did not cover the goose's body. Treeline channel wet and right channel flowing lightly.
13189 12 Aug 2019 @ 1031 --- RMichaels Start of overflow.
13188 12 Aug 2019 @ 0755 --- JoeN looked like Artemisia at 0252 on GOSA overnight which would agree with RM's note. With it being that dark it would be only a guess.
13187 12 Aug 2019 @ 0751 --- RMichaels Pool is about 8 inches below overflow. Likely erupted very early in the morning.
13150 10 Aug 2019 @ 1650 --- William post eruptive. pool down 1 1/2 to 2 feet from overflow and rising. Italy about 1/2" from rim.
13143 10 Aug 2019 @ 1105 --- RMichaels Pool in light overflow.
13273 10 Aug 2019 @ 0727 --- ypcaribou Steam in area of Artemisia that lasted about 13 minutes. No direct observation in person. Right place but some suggest it's not possible it erupted then. But steam from SOMETHING was seen on wc at that time.
13089 07 Aug 2019 @ 0905 --- William had overnight eruption. pool is full with light overflow.
13041 05 Aug 2019 @ 0600 05 Aug 2019 @ 1300 William Arte being Arte... in moderate to heavy overflow at arrival with horseshoe and gooseneck covered throughout observation.
12800 26 Jul 2019 @ 0730 --- William No overnight eruption. pool in overflow with moderate runoff.
12787 23 Jul 2019 @ 1445 --- K.Cooper Something was erupting in this area at this time, however, it is unknown whether it was Atomizer or Artemisia
12566 23 Jul 2019 @ 0719 --- Casey An earlier post indicated an eruption at this time. An observation of the pool ~2 hours later seems to indicate a far earlier eruption.
12537 20 Jul 2019 @ 0830 20 Jul 2019 @ 0955 William Pool in overflow, horseshoe not yet covered upon arrival. water slightly better by end time but still light overflow.
12515 18 Jul 2019 @ 1215 18 Jul 2019 @ 2115 William in moderate overflow upon arrival. no eruption.
12458 12 Jul 2019 @ 2000 12 Jul 2019 @ 2045 William heavy overflow, gooseneck underwater during pushes.
12473 12 Jul 2019 @ 1530 --- ldgordon Overflowing
12417 09 Jul 2019 @ 1025 --- William Pool 6"-12" below overflow
12039 29 Jun 2019 @ 1756 29 Jun 2019 @ 1758 William Observed what appeared to be a false start. Pool in heavy overflow and water level was covering gooseneck when I heard 3 faint thumps and saw water level rise 1/2 inch. Boil began to intensify and seemed to teeter on eruption for about 1 minute. Pool began to drop after activity and settled about 1inch from highest water level point observed within 10-15 min.
11965 26 Jun 2019 @ 0730 26 Jun 2019 @ 0830 William Pool in light overflow.
11952 25 Jun 2019 @ 1015 25 Jun 2019 @ 1200 William moderate overflow.
11912 22 Jun 2019 @ 1455 22 Jun 2019 @ 1621 ldgordon No eruption, high fill that covered gooseneck and horseshoe from about 1555 - 1605. Water still seemed relatively high upon leaving
11909 22 Jun 2019 @ 0700 22 Jun 2019 @ 1045 William no overnight eruption. light/moderate overflow.
11900 21 Jun 2019 @ 1700 --- William no eruption yet. Pool in heavy overflow
11896 21 Jun 2019 @ 0925 21 Jun 2019 @ 0945 William Just at overflow.
11893 20 Jun 2019 @ 1345 --- William overflow still light
11892 20 Jun 2019 @ 1030 20 Jun 2019 @ 1100 William light overflow. lots of waves on pool due to wind but looks low.
11861 17 Jun 2019 @ 1750 --- William light overflow.
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.
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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