Last Known Eruption
9d 3h 5m ago

Latest Eruptions

Eruption DurationInterval
19 Mar 2023 @ 1123 ie wc3d 19h 54m
15 Mar 2023 @ 1529 ie wc3d 1h 10m
12 Mar 2023 @ 1419 ie wc23h 41m
11 Mar 2023 @ 1338 ie wc4d 16h 25m
06 Mar 2023 @ 2113 ie wc2d 20h 13m
04 Mar 2023 @ 0100 ie wc23h 1m
03 Mar 2023 @ 0159 ie wc5d 7h 47m
25 Feb 2023 @ 1812 ie5d 4h 27m
20 Feb 2023 @ 1345 ie wc2d 4h 16m
18 Feb 2023 @ 0929 ie wc19h 28m
17 Feb 2023 @ 1401 ie wc1d 2h 6m
16 Feb 2023 @ 1155 ie wc2d 18h 9m
13 Feb 2023 @ 1746 ns wc1d 35m
12 Feb 2023 @ 1711~25m 23h 50m
11 Feb 2023 @ 1721 ie wc12d 4h 22m
30 Jan 2023 @ 1259 ie wc4d 22h 11m
25 Jan 2023 @ 1448 ie4d 3h 33m
21 Jan 2023 @ 1115 ? ie1d 15m
20 Jan 2023 @ 1100 maj30m 5d 21h 57m
14 Jan 2023 @ 1303 ie wc5d 6h 46m
09 Jan 2023 @ 0617 ie wc23h 17m
08 Jan 2023 @ 0700 A18h 36m
07 Jan 2023 @ 1224 ie wc1d 24m
06 Jan 2023 @ 1200 ie wc3d 17h 26m
02 Jan 2023 @ 1834 E18h 47m
01 Jan 2023 @ 2347 E1d 5h 50m
31 Dec 2022 @ 1757 E1d 4h 2m
30 Dec 2022 @ 1355 E20h 51m
29 Dec 2022 @ 1704 E1d 5h 44m
28 Dec 2022 @ 1120 E22h 53m
27 Dec 2022 @ 1227 E3d 1h 15m
24 Dec 2022 @ 1112 E1d 3h 22m
23 Dec 2022 @ 0750 E1d 2h 29m
22 Dec 2022 @ 0521 E1d 10h 7m
20 Dec 2022 @ 1914 E1d 1h 6m
19 Dec 2022 @ 1808 E1d 6h 3m
18 Dec 2022 @ 1205 ie wc21h 42m
17 Dec 2022 @ 1423 E22h 55m
16 Dec 2022 @ 1528 ie wc21h 26m
15 Dec 2022 @ 1802 E19h 37m
14 Dec 2022 @ 2225 E4d 18h 16m
10 Dec 2022 @ 0409 ie wc1d 16h 38m
08 Dec 2022 @ 1131 ns wc4d 22h 51m
03 Dec 2022 @ 1240 ns wc7d 23h 31m
25 Nov 2022 @ 1309 ie wc20h 45m
24 Nov 2022 @ 1624 ie wc3d 4h 37m
21 Nov 2022 @ 1147 ns wc4d 22h 53m
16 Nov 2022 @ 1254 ie wc23h 33m
15 Nov 2022 @ 1321 ie wc1d 3h 37m
14 Nov 2022 @ 0944 ie wc1d 7h 53m
13 Nov 2022 @ 0151 ie wc2d 15h 39m
10 Nov 2022 @ 1012 ie wc2d 16h 2m
07 Nov 2022 @ 1810 E1d 2h 9m
06 Nov 2022 @ 1601 ie wc1d 37m
05 Nov 2022 @ 1624 ie wc19h 33m
04 Nov 2022 @ 2051 E1d 4h 28m
03 Nov 2022 @ 1623 ie wc17h 46m
02 Nov 2022 @ 2237 wc1d 3h 19m
01 Nov 2022 @ 1918 E15h 56m
01 Nov 2022 @ 0322 E19h 29m
31 Oct 2022 @ 0753 E18h 34m
30 Oct 2022 @ 131923h 10m
29 Oct 2022 @ 1409 E1d 28m
28 Oct 2022 @ 1341 E18h 54m
27 Oct 2022 @ 1847 E1d 17h 25m
26 Oct 2022 @ 0122 E17h 21m
25 Oct 2022 @ 0801 E23h 43m
24 Oct 2022 @ 0818 E1d 4h 2m
23 Oct 2022 @ 0416 E18h 8m
22 Oct 2022 @ 1008 E17h 29m
21 Oct 2022 @ 1639 E15h 58m
21 Oct 2022 @ 0041 E18h 19m
20 Oct 2022 @ 0622 E19h 44m
19 Oct 2022 @ 1038 E1d 4h 38m
18 Oct 2022 @ 0600 A19h 25m
17 Oct 2022 @ 1035 ie17h 10m
16 Oct 2022 @ 1725 ie1d 4h 29m
15 Oct 2022 @ 1256 ie1d 4h 14m
14 Oct 2022 @ 0842 ie wc17h 52m
13 Oct 2022 @ 1450 ie21h 9m
12 Oct 2022 @ 174129m 45s 21h 18m
11 Oct 2022 @ 2023 wc1d 7h 39m
10 Oct 2022 @ 1244 ie1d 3h 13m
09 Oct 2022 @ 093122m 25s 20h 52m
08 Oct 2022 @ 1239 ns~21m 1d 2h 27m
07 Oct 2022 @ 101222m 18s 21h 12m
06 Oct 2022 @ 1300 A22h 24m
05 Oct 2022 @ 1436 ie wc16h 5m
04 Oct 2022 @ 2231 ie wc1d 11h 46m
03 Oct 2022 @ 1045 ie23h 6m
02 Oct 2022 @ 1139 ie wc1d 17h 23m
30 Sep 2022 @ 181627m 21s 1d 18h 23m
28 Sep 2022 @ 235328m 1d 8h 50m
27 Sep 2022 @ 150335m 14s 1d 4h 16m
26 Sep 2022 @ 1047 ie21h 3m
25 Sep 2022 @ 134422m 49s 23h 25m
24 Sep 2022 @ 141924m 50s 1d 4h 20m
23 Sep 2022 @ 095924m 43s 1d 1h 48m
22 Sep 2022 @ 0811 ns>2521h 16m
21 Sep 2022 @ 105522m 27s 22h 10m

Interval Statistics

Interval Count100
Min15h 56m
Max12d 4h 22m
Mean1d 19h 11m
Median1d 1h 57m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
24983 06 Feb 2023 @ 1419 --- Colin_W Pool looking full.
24952 26 Jan 2023 @ 1015 --- Colin_W Pool looking full.
24906 15 Jan 2023 @ 1026 --- Colin_W Pool looking full or at least more so than when I normally get here.
24645 06 Nov 2022 @ 1155 --- mhreed No eruption yet. 15 m of cord.
24639 04 Nov 2022 @ 1417 --- mhreed No eruption yet.
24146 28 Sep 2022 @ 1430 --- ThomasR No eruption yet
24132 27 Sep 2022 @ 0830 --- ThomasR Likely had no overnight eruption.
24049 24 Sep 2022 @ 0820 --- ThomasR Had no overnight eruption. Last eruption 22h 21m ago.
23928 20 Sep 2022 @ 0809 --- RLJones It is currently in overflow
23479 29 Aug 2022 @ 1200 29 Aug 2022 @ 2030 TLH Various gazers observed from noon until 20:30. Pool levels were good when we left at 20:30.
22669 15 Jul 2022 @ 1419 --- hkoenig [In Overflow]
22483 11 Jul 2022 @ 0811 --- Dan A No overnight eruption, earlier wc post was incorrect
22224 30 Jun 2022 @ 0825 --- Dan A Erupted overnight, pool below overflow
22074 23 Jun 2022 @ 0842 --- Dan A Erupted overnight, Italy, wu tang, apostrophe all low, pool in overflow.
21130 29 Apr 2022 @ 0700 29 Apr 2022 @ 1230 RMichaels Artemisia had pushes at about 0800, 0900, and 1000. The pool crashed around 1030 and never really came back up again until I left at 1230. Prevalent north wind throughout most of the morning.
20744 21 Jan 2022 @ 1625 --- BrandonC No eruption yet
20737 20 Jan 2022 @ 1405 --- BrandonC No eruption yet
20223 30 Oct 2021 @ 1444 --- DanS Pool low. Must have erupted earlier today.
19316 05 Sep 2021 @ 1325 --- Graham Post erupted, already started recovery.
19083 26 Aug 2021 @ 1252 --- music_geek Pool low, post eruptive.
18862 08 Aug 2021 @ 0629 --- eh no eruption yet
18097 25 Jun 2021 @ 2245 --- William did not erupt prior to this time.
17934 19 Jun 2021 @ 2100 --- WillBoekel no eruption yet
17750 13 Jun 2021 @ 1717 --- Craigmon99 2 feet below overflow
17661 11 Jun 2021 @ 0904 --- TheHikingDude High water, low boiling across the entire pool, about 2 inches from overflow
17466 04 Jun 2021 @ 2025 --- William high water
17464 04 Jun 2021 @ 1928 04 Jun 2021 @ 1955 William high water on arrival, dropped at 19:55
17365 02 Jun 2021 @ 0655 --- Mike C below overflow about 1 foot
15946 04 Sep 2020 @ 0004 --- BrandonC No eruption as of 0004
15924 31 Aug 2020 @ 1916 --- William water starting to rise
15893 29 Aug 2020 @ 1900 --- deanl water level was about 18-24" below overflow, so my guess is an eruption between 15 & 16:00.
15105 25 Jul 2020 @ 1950 --- William 1st overflow of sundress
14987 15 Jul 2020 @ 0600 15 Jul 2020 @ 0800 William No Arte overnight. high water at 07:10, low at 07:52
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
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.