Last Known Eruption
13h 46m ago

Latest Eruptions

Eruption DurationInterval
06 Jul 2020 @ 090527m 12s 22h 15m
05 Jul 2020 @ 105014m 37s 1d 1h 42m
04 Jul 2020 @ 090823m 17s 19h 24m
03 Jul 2020 @ 1344 ie wc18h 36m
02 Jul 2020 @ 19081d 8h 22m
01 Jul 2020 @ 104623m 16h 20m
30 Jun 2020 @ 1826 ie11h 37m
30 Jun 2020 @ 064920m 22h 39m
29 Jun 2020 @ 081038m 1d 3h 10m
28 Jun 2020 @ 0500 ie wc13h 5m
27 Jun 2020 @ 1555 ie wc13h 55m
27 Jun 2020 @ 0200 A15h 13m
26 Jun 2020 @ 104722m 19h 37m
25 Jun 2020 @ 151028m 16h 10m
24 Jun 2020 @ 2300 A18h 15m
24 Jun 2020 @ 0445 A15h 45m
23 Jun 2020 @ 1300 A22h 36m
22 Jun 2020 @ 1424 ie wc22h 3m
21 Jun 2020 @ 1621 ie wc2d 11h 36m
19 Jun 2020 @ 0445 A19h 54m
18 Jun 2020 @ 0851 ie wc20h 9m
17 Jun 2020 @ 1242 ns wc20h 9m
16 Jun 2020 @ 1633 ns wc22h 19m
15 Jun 2020 @ 1814 ns18h 44m
14 Jun 2020 @ 2330 A1d 2h 17m
13 Jun 2020 @ 2113 ns21h 43m
12 Jun 2020 @ 2330 A14h 15m
12 Jun 2020 @ 0915 wc1d 2h 53m
11 Jun 2020 @ 0622 ie wc22h 59m
10 Jun 2020 @ 0723 ie wc1d 2h 41m
09 Jun 2020 @ 0442 ie wc1d 3h 9m
08 Jun 2020 @ 0133 ie wc1d 17h 3m
06 Jun 2020 @ 0830 A13h 49m
05 Jun 2020 @ 1841 ie19h 24m
04 Jun 2020 @ 2317 wc21h 59m
04 Jun 2020 @ 0118 ie wc10h 37m
03 Jun 2020 @ 1441 ie wc12h 25m
03 Jun 2020 @ 0216 ie wc20h 18m
02 Jun 2020 @ 0558 ns wc1d 10h 27m
31 May 2020 @ 1931 wc2d 4h 18m
29 May 2020 @ 1513 ie wc22h 16m
28 May 2020 @ 1657 wc22h 32m
27 May 2020 @ 1825 ie wc1d 4h 11m
26 May 2020 @ 1414 ns22h 50m
25 May 2020 @ 1524 ie wc2d 20h 36m
22 May 2020 @ 1848 ie wc2d 10h 33m
20 May 2020 @ 0815 ie wc22h 55m
19 May 2020 @ 0920 ie wc2d 22h 13m
16 May 2020 @ 1107 ie wc1d 22m
15 May 2020 @ 1045 ie wc3d 3h 56m
12 May 2020 @ 0649 ie wc15h 9m
11 May 2020 @ 1540 ie wc4d 3h 38m
07 May 2020 @ 1202 ie wc1d 20h 52m
05 May 2020 @ 1510 ie wc6d 5h 44m
29 Apr 2020 @ 0926 ns wc2d 1h 51m
27 Apr 2020 @ 0735 ns wc23h 20m
26 Apr 2020 @ 0815 ie wc23h 29m
25 Apr 2020 @ 0846 ie wc1d 37m
24 Apr 2020 @ 0809 ie wc5d 14h 5m
18 Apr 2020 @ 1804 ie wc21h 56m
17 Apr 2020 @ 2008 ie wc3d 8h 29m
14 Apr 2020 @ 1139 ns wc1d 3h 1m
13 Apr 2020 @ 0838 ie wc3d 2h 19m
10 Apr 2020 @ 0619 ie wc22h 12m
09 Apr 2020 @ 0807 ns wc17h 33m
08 Apr 2020 @ 1434 ie wc1d 2h 25m
07 Apr 2020 @ 1209 ns wc1d 20h 21m
05 Apr 2020 @ 1548 wc22h 27m
04 Apr 2020 @ 1721 ie wc7d 10h 7m
28 Mar 2020 @ 0714 wc20h 48m
27 Mar 2020 @ 1026 ie wc2d 21h 29m
24 Mar 2020 @ 1257 ie wc2d 1h 54m
22 Mar 2020 @ 1103 ie wc20h 11m
21 Mar 2020 @ 1452 ie wc1d 1h 18m
20 Mar 2020 @ 1334 ie wc4d 18h 23m
15 Mar 2020 @ 1911 ie wc2d 4h 44m
13 Mar 2020 @ 1427 ie wc5d 21h 10m
07 Mar 2020 @ 1617 ie wc3d 8h 17m
04 Mar 2020 @ 0800 ie wc17h 41m
03 Mar 2020 @ 1419 ie wc7d 19h 42m
24 Feb 2020 @ 1837 ie wc10d 6h 6m
14 Feb 2020 @ 1231 ie wc4d 21h 6m
09 Feb 2020 @ 1525 ie wc min1d 21h 30m
07 Feb 2020 @ 1755 ie wc3d 4h 24m
04 Feb 2020 @ 1331 ie wc23h 32m
03 Feb 2020 @ 1359 ie wc2d 50m
01 Feb 2020 @ 1309 ns wc13d 45m
19 Jan 2020 @ 1224 ? wc23h 4m
18 Jan 2020 @ 1320 ie wc2d 1h 8m
16 Jan 2020 @ 1212 ie wc20h 3m
15 Jan 2020 @ 1609 ie wc17d 2h 2m
29 Dec 2019 @ 1407 ie wc2d 2h 50m
27 Dec 2019 @ 1117 ie wc1d 3h 52m
26 Dec 2019 @ 0725 ? ns wc2d 18h 35m
23 Dec 2019 @ 1250 ie wc4d 5h 0m
19 Dec 2019 @ 0750 ns wc1d 16h 18m
17 Dec 2019 @ 1532 ie wc21h 55m
16 Dec 2019 @ 1737 ie wc4d 33m
12 Dec 2019 @ 1704 ie wc1d 9h 20m
11 Dec 2019 @ 0744 ie wc6d 15h 13m

Interval Statistics

Interval Count100
Min10h 37m
Max17d 2h 2m
Mean2d 3h 30m
Median1d 1h 30m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
14752 28 Jun 2020 @ 0735 --- LynnS About 6-8 inches below the rim of the crater.
14739 26 Jun 2020 @ 1826 --- RLE Klammer Goose neck submerged as of 18:26
14713 22 Jun 2020 @ 1635 22 Jun 2020 @ 1833 RLE Klammer Pool at 16:35 was about 6-7 inches below rim. By 18:30, water was about 1 inch below rim, roughly estimate 1 1/2 inchs below gooseneck. No marmots.
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.
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.
EntrySourceLinkComment
05 Sep 2019 @ 0910 Michael https://darksky.net/details/44.4618,-110.8369/2019-9-05/us12/en Weather on 2019-09-05 at Old Faithful, WY according to Dark Sky Time Machine
27 Jul 2019 @ 0702 Michael https://darksky.net/details/44.4618,-110.8369/2019-7-27/us12/en Weather on 2019-07-27 at Old Faithful, WY according to Dark Sky Time Machine
10 Aug 2019 @ 0727 Michael https://darksky.net/details/44.4618,-110.8369/2019-8-10/us12/en Weather on 2019-08-10 at Old Faithful, WY according to Dark Sky Time Machine
05 Sep 2019 @ 0910 Michael https://youtu.be/N_1tIxoKIaU?t=1094 Old Faithful Geyser Streaming Webcam Capture of 2019-09-05 @ 0911:56
27 Jul 2019 @ 0702 Michael https://youtu.be/P7HwyIOtUpU?t=1522 Old Faithful Geyser Streaming Webcam Capture of 2019-07-27 @ 0654:00
10 Aug 2019 @ 0727 Michael https://youtu.be/NuegRYu7l1g?t=446 Old Faithful Geyser Streaming Webcam Capture of 2019-08-10 @ 0724:34
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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