Last Known Eruption
1h 40m ago
Predicted Next Eruption
Today at 1235 ± 13 minutes

Latest Eruptions

Eruption DurationInterval
28 May 2020 @ 1058 wc long1h 28m
28 May 2020 @ 0930 wc long1h 33m
28 May 2020 @ 0757 wc long1h 37m
28 May 2020 @ 0620 wc long1h 34m
28 May 2020 @ 0446 ie wc8h 12m
27 May 2020 @ 2034 wc long1h 40m
27 May 2020 @ 1854 wc long1h 39m
27 May 2020 @ 1715 wc long1h 29m
27 May 2020 @ 1546 wc long1h 42m
27 May 2020 @ 1404 ns wc1h 17m
27 May 2020 @ 1247 wc long1h 47m
27 May 2020 @ 1100 wc long1h 34m
27 May 2020 @ 0926 wc long1h 41m
27 May 2020 @ 0745 wc long1h 38m
27 May 2020 @ 0607 wc long9h 48m
26 May 2020 @ 2019 wc long1h 30m
26 May 2020 @ 1849 wc1h 38m
26 May 2020 @ 1711 wc long1h 34m
26 May 2020 @ 1537 wc long1h 37m
26 May 2020 @ 1400 wc long1h 34m
26 May 2020 @ 1226 wc long1h 24m
26 May 2020 @ 1102 wc long1h 45m
26 May 2020 @ 0917 wc long1h 41m
26 May 2020 @ 0736 wc long1h 43m
26 May 2020 @ 0553 ns wc9h 7m
25 May 2020 @ 2046 ie wc1h 36m
25 May 2020 @ 1910 wc long1h 45m
25 May 2020 @ 1725 wc long1h 36m
25 May 2020 @ 1549 wc long4m 12s 1h 28m
25 May 2020 @ 1421 wc≥3m26s1h 48m
25 May 2020 @ 1233 wc long4m 23s 1h 6m
25 May 2020 @ 1127 wc short1m 56s 1h 34m
25 May 2020 @ 0953 wc long1h 28m
25 May 2020 @ 0825 wc long1h 40m
25 May 2020 @ 0645 wc long1h 29m
25 May 2020 @ 0516 wc long9h 12m
24 May 2020 @ 2004 wc long1h 30m
24 May 2020 @ 1834 wc long1h 37m
24 May 2020 @ 1657 wc long1h 32m
24 May 2020 @ 1525 wc long1h 32m
24 May 2020 @ 1353 wc long1h 40m
24 May 2020 @ 1213 wc long4m 9s 1h 34m
24 May 2020 @ 1039 wc long1h 40m
24 May 2020 @ 0859 wc long4m 12s 1h 28m
24 May 2020 @ 0731 wc long1h 46m
24 May 2020 @ 0545 wc9h 35m
23 May 2020 @ 2010 wc long1h 40m
23 May 2020 @ 1830 wc long1h 30m
23 May 2020 @ 1700 wc long1h 34m
23 May 2020 @ 1526 wc long1h 41m
23 May 2020 @ 1345 wc long1h 33m
23 May 2020 @ 1212 wc long1h 45m
23 May 2020 @ 1027 wc long1h 32m
23 May 2020 @ 0855 wc long1h 36m
23 May 2020 @ 0719 wc long1h 26m
23 May 2020 @ 0553 wc long8h 11m
22 May 2020 @ 2142 wc long1h 28m
22 May 2020 @ 2014 wc long1h 38m
22 May 2020 @ 1836 ns wc long1h 26m
22 May 2020 @ 1710 wc long1h 38m
22 May 2020 @ 1532 wc long1h 40m
22 May 2020 @ 1352 wc long4m 1s 1h 43m
22 May 2020 @ 1209 ns wc1h 17m
22 May 2020 @ 1052 wc1h 46m
22 May 2020 @ 0906 wc long1h 47m
22 May 2020 @ 0719 wc long1h 31m
22 May 2020 @ 0548 ns wc9h 38m
21 May 2020 @ 2010 wc long1h 34m
21 May 2020 @ 1836 wc long1h 36m
21 May 2020 @ 1700 wc long1h 29m
21 May 2020 @ 1531 ns wc long1h 37m
21 May 2020 @ 1354 wc long4m 24s 1h 46m
21 May 2020 @ 1208 wc long4m 33s 1h 40m
21 May 2020 @ 1028 wc long1h 42m
21 May 2020 @ 0846 wc long4m 36s 1h 18m
21 May 2020 @ 0728 wc short2m 10s 1h 31m
21 May 2020 @ 0557 ns wc long8h 18m
20 May 2020 @ 2139 wc long1h 38m
20 May 2020 @ 2001 wc long1h 34m
20 May 2020 @ 1827 wc long5m 4s 1h 26m
20 May 2020 @ 1701 wc short1h 27m
20 May 2020 @ 1534 wc long3m 49s 1h 42m
20 May 2020 @ 1352 wc long4m 34s 1h 9m
20 May 2020 @ 1243 wc short1h 33m
20 May 2020 @ 1110 wc long1h 30m
20 May 2020 @ 0940 wc long1h 30m
20 May 2020 @ 0810 wc long1h 34m
20 May 2020 @ 0636 wc9h 32m
19 May 2020 @ 2104 wc long1h 34m
19 May 2020 @ 1930 wc1h 36m
19 May 2020 @ 1754 wc long1h 28m
19 May 2020 @ 1626 wc1h 37m
19 May 2020 @ 1449 wc long4m 27s 1h 29m
19 May 2020 @ 1320 wc long4m 11s 1h 36m
19 May 2020 @ 1144 wc long4m 21s 1h 26m
19 May 2020 @ 1018 wc long1h 33m
19 May 2020 @ 0845 wc long1h 26m
19 May 2020 @ 0719 wc long1h 38m
19 May 2020 @ 0541 ns wc7h 48m
18 May 2020 @ 2153 wc long1h 37m

Interval Statistics

Interval Count100
Min1h 6m
Max9h 48m
Mean2h 18m
Median1h 36m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
14247 27 May 2020 @ 0612 --- JarnoO (wc) Steam devil formed over Old Faithful's vent early this minute and headed south (to right). Appeared to be dissipating late 0612, but webcam panned away early.
14127 17 Feb 2020 @ 1139 --- underarockphoto Preplay event up to 35ft tall lasting 38 seconds from 1139:52 to 1140:30 per /getvideo timestamps.
14123 13 Feb 2020 @ 1133 --- underarockphoto Preplay event between 10-30ft tall lasted 1m 10s.
13826 27 Sep 2019 @ 1803 --- Ben VL Got OF rain all the way on geyser hill near the SE junction.
13767 20 Sep 2019 @ 1459 --- Polly VEC measured a height of 161’ on this eruption.
13766 20 Sep 2019 @ 1326 --- Polly VEC reported a height of 165’ on this OF.
11691 09 Jun 2019 @ 1755 --- JSJ Inclinometer reading: Old Faithful Geyser's eruption column reached about 111 feet high.
11689 09 Jun 2019 @ 1613 --- JSJ Inclinometer reading: Old Faithful's eruption column reached about 102 feet high.
10739 16 Nov 2018 @ 1845 --- STS Steam post-eruption filling entire viewing area.
10615 16 Oct 2018 @ 0417 --- JarnoO Large preplay for ~30s.
9554 08 Aug 2018 @ 1947 --- c.barwin This eruption was featured live on the final evening of National Geographic's Live show.
9536 08 Aug 2018 @ 0705 --- JarnoO ~30s sustained pre-eruption preplay.
9498 06 Aug 2018 @ 1939 --- c.barwin This eruption was covered on the 8/6/18 National Geographic's Yellowstone Live show.
8712 16 Jun 2018 @ 0912 --- JarnoO Large, sustained preplay made me think OF was going to start. It didn't.
7964 02 Apr 2018 @ 1140 --- Kevin L Snow was so heavy OF area was totally a whiteout on both streaming and static cam
7955 08 Mar 2018 @ 0643 --- DaveM This eruption was a long duration 3m10s
7817 09 Nov 2017 @ 0632 --- JarnoO Appears to be post-eruptive. Runoff channels steamy. Temperature as of writing 23°F.
7798 30 Oct 2017 @ 1017 30 Oct 2017 @ 1018 JarnoO Strong preplay, which could've resulted in an eruption.
7283 25 Sep 2017 @ 0924 --- Kitt B preplay, so previous eruption was a short
6996 23 Sep 2017 @ 0632 --- JarnoO ~45s strong preplay which usually results in an eruption. No eruption followed.
5071 19 Aug 2017 @ 1817 --- Graham Really big and long preplay that would normally start the eruption.
4503 19 Jul 2017 @ 1500 --- SteveO VC in now predicting Old Faithful 98 minutes + or - 10 minutes
4120 23 May 2017 @ 0513 --- JarnoO Was pre-eruptive spouting. Likely went before 0530.
3270 09 Jul 2016 @ 0246 --- JarnoO Looked like it was in a post-eruptive phase. Definitely went during nightly reset.
3220 06 Jul 2016 @ 0207 --- smousley This is my first time on the site. I live in Dubai, hence the odd time of this note. I was looking at the ABC News Live cam, which is not so live, and came here to find out when the next eruption of OF might be. Then is seem strange that there is no reported eruption for over 4 hours. Is it because no one reported one?
3141 27 Jun 2016 @ 0216 --- JarnoO May have erupted during early (0216-0225) nightly reset of the webcam. A lot of pre-eruptive spouting just before the interuption.
2935 01 Jun 2016 @ 2017 --- MikeG Forgot to write down eruption time. It might have been 20:17, and short duration.
315 22 Jun 2012 @ 0546 22 Jun 2012 @ 0552 Loisb I have OF starting at 0546 per the UB cam and it was a long. I also have Lion starting at 0552 which would make it an initial
111 17 Feb 2012 @ 1011 --- BB OF was 10:11 ie wc (time stamp UGB cam)
88 24 Jan 2012 @ 1250 --- ofcarolyn Park employees are downloading Old Faithful\'s temperature logger near 12:50 p.m. today.
727 19 Jan 2012 @ 1200 19 Jan 2012 @ 2359 WillBoekel Electronic temperature trace for the afternoon/evening has no spikes. Probably caused by an ice dam diverting the runoff.
1020 29 Sep 2008 @ 0000 29 Sep 2008 @ 2359 BoekelUpload
1010 09 Sep 2008 @ 1100 09 Sep 2008 @ 1109 BoekelUpload 11:0x 120 ft
970 20 Jun 2008 @ 0550 20 Jun 2008 @ 0559 BoekelUpload 5:5x
1365 27 Jul 2007 @ 0000 27 Jul 2007 @ 2359 BoekelUpload Old Faithful 90 minute long interval reimplemented.
1364 16 Jul 2007 @ 0000 16 Jul 2007 @ 2359 BoekelUpload Old Faithful long changed back to 92 minutes
1363 14 Jul 2007 @ 0000 14 Jul 2007 @ 2359 BoekelUpload Old Faithful prediction long interval changed to 90 minutes.
1362 11 Jun 2007 @ 0000 11 Jun 2007 @ 2359 BoekelUpload time missing
1361 22 May 2007 @ 0949 22 May 2007 @ 1301 BoekelUpload missing time [between 09:49 and 13:01 eruptions]
12782 21 Dec 1994 @ 0635 21 Dec 1994 @ 0917 JarnoO break
12781 21 Dec 1994 @ 0107 21 Dec 1994 @ 0635 JarnoO break
12775 23 Nov 1994 @ 0641 23 Nov 1994 @ 1230 JarnoO obscured
12774 23 Nov 1994 @ 0110 23 Nov 1994 @ 0440 JarnoO obscured
12772 20 Nov 1994 @ 1108 20 Nov 1994 @ 1333 JarnoO obscured
12771 11 Nov 1994 @ 0143 11 Nov 1994 @ 0401 JarnoO obscured
12748 04 Oct 1994 @ 2051 05 Oct 1994 @ 0048 JarnoO obscured
12743 23 Sep 1994 @ 0009 23 Sep 1994 @ 1943 JarnoO 15 consecutive longs
12625 15 Mar 1994 @ 1958 --- JarnoO Old Faithful ink cartridge ran out abruptly at 1958 on 3/15/1994. Naturalists did not check strip chart recorder for next 3 days while Research Geologist was in Pelican Valley.
12602 16 Feb 1994 @ 0003 --- JarnoO very heavy preplay: perhaps minor eruption; d=.6-1.0 min
12593 03 Feb 1994 @ 0326 03 Feb 1994 @ 0730 JarnoO obscured
12588 21 Jan 1994 @ 2332 22 Jan 1994 @ 0150 JarnoO obscured
221 02 Feb 1972 @ 0000 02 Feb 1972 @ 2359 BoekelUpload extcold;fog
220 31 Jan 1972 @ 0000 --- BoekelUpload Fog <10
EntrySourceLinkComment
09 Jan 2020 @ 1405 EricZ https://youtu.be/bGFDFFaj5Ko?t=176 60+ seconds of strong pre-play
08 Jun 2019 @ 1042 CraigC https://geysercam.xyz/ugb-ynp/06082019/344.jpg static webcam
07 Aug 2018 @ 1711 JSJ https://www.flickr.com/photos/jsjgeology/45609961595 Photo (out of 3) of Old Faithful Geyser's 5:11 to 5:15 PM eruption on 7 August 2018.
27 Jul 2017 @ 1544 JSJ https://www.flickr.com/photos/jsjgeology/36496639821 Photo (1 of 2) of Old Faithful Geyser's 3:44 PM-onward eruption on 27 July 2017.
16 Jan 2017 @ 1255 ZubenElGenubi https://www.youtube.com/watch?v=juEHWs0fTjo YouTube @ 4x. Eruption closer to 12:55:30
18 Dec 2016 @ 1044 JSJ https://www.youtube.com/watch?v=xrfIZZxrvoI Webcam capture video of Old Faithful Geyser's 10:44 to 10:47 AM eruption on 18 December 2016.
10 Aug 2016 @ 1826 JSJ https://www.flickr.com/photos/jsjgeology/29791560694 Thermal image of Old Faithful Geyser's 6:26 PM-onward eruption on 10 August 2016.
10 Aug 2016 @ 1826 JSJ https://www.flickr.com/photos/jsjgeology/30336105571 Photo (1 of 10) of Old Faithful Geyser's 6:26 PM-onward eruption on 10 August 2016.
03 Jun 2016 @ 1139 JSJ https://www.flickr.com/photos/jsjgeology/28195935180 Photo (1 of 3) of Old Faithful Geyser's 11:39 AM eruption on 3 June 2016.
29 Jun 2016 @ 1434 Biddle https://imgur.com/gallery/2OyAk54 Late in eruption. Still screenshotting too slow.
27 Jun 2016 @ 1508 Biddle https://imgur.com/gallery/njPonFv Yet again, i need to screenshot faster. I am planning on doing this more often.
24 Apr 2016 @ 1847 JSJ https://www.youtube.com/watch?v=D8-zSGXWdf0 Video (via webcam) of the Old Faithful Geyser-Beehive Geyser dual eruption in the early evening of 24 April 2016.
09 Apr 2016 @ 1934 JSJ https://www.flickr.com/photos/jsjgeology/26336846585 Webcam screen capture photo (1 of 3) of Old Faithful Geyser's 7:34 to 7:38 PM eruption on 9 April 2016.
26 Mar 2016 @ 1915 ZubenElGenubi https://youtu.be/vGGyzWt9QZQ YouTube video showing eruption before webcam is swung away.
26 Mar 2016 @ 1254 JSJ https://www.youtube.com/watch?v=MvQH1ALv3No Video (via webcam) of Old Faithful Geyser's 12:54 to 12:59 PM eruption on 26 March 2016.
20 Mar 2016 @ 1141 JSJ https://www.youtube.com/watch?v=2LiBLge2frg Video (via webcam) of Old Faithful Geyser's 11:41 to 11:45 AM eruption on 20 March 2016.
18 Mar 2016 @ 1542 ZubenElGenubi https://youtu.be/dVluo98bzgc YouTube upload with clock sync
18 Mar 2016 @ 1046 JSJ https://www.flickr.com/photos/jsjgeology/25860369156 Video (via webcam) of Old Faithful Geyser's 10:46 to 10:50 AM eruption on 18 March 2016.
14 Mar 2016 @ 1658 JSJ https://www.youtube.com/watch?v=285OZNxyjtk Video (via webcam) of most of Old Faithful Geyser's short eruption from 4:58 to 5:01 PM on 14 March 2016.
04 Mar 2016 @ 1551 JSJ https://www.flickr.com/photos/jsjgeology/25392240742 Webcam screen capture photo (1 of 3) of the Old Faithful Geyser-Beehive Geyser concerted eruption in the afternoon of 4 March 2016.
Baseline does not exist.


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