Last Known Eruption
38m ago
Predicted Next Eruption
Today at 1923 ± 13 minutes

Latest Eruptions

Eruption DurationInterval
28 Sep 2020 @ 1747 ie wc1h 15m
28 Sep 2020 @ 1632 wc long1h 48m
28 Sep 2020 @ 1444 wc long4m 11s 1h 25m
28 Sep 2020 @ 1319 wc3m 22s 1h 41m
28 Sep 2020 @ 1138 wc long1h 36m
28 Sep 2020 @ 1002 ns wc1h 30m
28 Sep 2020 @ 0832 wc long1h 42m
28 Sep 2020 @ 0650 wc long1h 35m
28 Sep 2020 @ 0515 wc long1h 31m
28 Sep 2020 @ 0344 wc long1h 35m
28 Sep 2020 @ 0209 wc long1h 28m
28 Sep 2020 @ 0041 wc long1h 31m
27 Sep 2020 @ 2310 wc1h 42m
27 Sep 2020 @ 2128 wc long1h 39m
27 Sep 2020 @ 1949 wc long3h 11m
27 Sep 2020 @ 1638 ns long1h 23m
27 Sep 2020 @ 1515 wc long3m 52s 1h 46m
27 Sep 2020 @ 1329 wc long1h 1m
27 Sep 2020 @ 1228 wc short1h 43m
27 Sep 2020 @ 1045 ie wc1h 4m
27 Sep 2020 @ 0941 wc short2m 21s 1h 38m
27 Sep 2020 @ 0803 wc long4m 11s 1h 40m
27 Sep 2020 @ 0623 wc long1h 34m
27 Sep 2020 @ 0449 wc long1h 44m
27 Sep 2020 @ 0305 wc long1h 33m
27 Sep 2020 @ 0132 wc long1h 46m
26 Sep 2020 @ 2346 wc long1h 28m
26 Sep 2020 @ 2218 wc long1h 38m
26 Sep 2020 @ 2040 wc long1h 19m
26 Sep 2020 @ 1921 wc short2m 0s 1h 35m
26 Sep 2020 @ 1746 wc long4m 40s 1h 3m
26 Sep 2020 @ 1643 wc short1m 41s 1h 42m
26 Sep 2020 @ 1501 wc long4m 13s 1h 38m
26 Sep 2020 @ 1323 wc long1h 36m
26 Sep 2020 @ 1147 wc long3m 57s 1h 41m
26 Sep 2020 @ 1006 wc long3m 48s 1h 36m
26 Sep 2020 @ 0830 wc long4m 13s 1h 26m
26 Sep 2020 @ 0704 wc long4m 0s 1h 42m
26 Sep 2020 @ 0522 wc long1h 37m
26 Sep 2020 @ 0345 wc long1h 34m
26 Sep 2020 @ 0211 wc long1h 32m
26 Sep 2020 @ 0039 wc long1h 34m
25 Sep 2020 @ 2305 wc long1h 42m
25 Sep 2020 @ 2123 wc long1h 41m
25 Sep 2020 @ 1942 wc long1h 45m
25 Sep 2020 @ 1757 wc long4m 35s 1h 14m
25 Sep 2020 @ 1643 wc short1h 44m
25 Sep 2020 @ 1459 wc long4m 38s 59m
25 Sep 2020 @ 1400 wc short1m 33s 1h 52m
25 Sep 2020 @ 1208 wc long4m 15s 1h 31m
25 Sep 2020 @ 1037 A long1h 49m
25 Sep 2020 @ 0848 wc long4m 32s 1h 30m
25 Sep 2020 @ 0718 wc long1h 37m
25 Sep 2020 @ 0541 wc long1h 38m
25 Sep 2020 @ 0403 wc long4h 45m
24 Sep 2020 @ 2318 wc long1h 50m
24 Sep 2020 @ 2128 ns wc1h 45m
24 Sep 2020 @ 1943 wc long1h 43m
24 Sep 2020 @ 1800 ie wc long1h 28m
24 Sep 2020 @ 1632 wc long1h 55m
24 Sep 2020 @ 1437 wc long4m 25s 1h 2m
24 Sep 2020 @ 1335 wc short1m 47s 1h 34m
24 Sep 2020 @ 1201 wc long4m 18s 1h 50m
24 Sep 2020 @ 1011 wc long1h 41m
24 Sep 2020 @ 0830 wc long1h 56m
24 Sep 2020 @ 0634 wc long1h 12m
24 Sep 2020 @ 0522 wc short1h 37m
24 Sep 2020 @ 0345 wc long1h 30m
24 Sep 2020 @ 0215 wc long1h 46m
24 Sep 2020 @ 0029 wc long1h 8m
23 Sep 2020 @ 2321 wc short1h 44m
23 Sep 2020 @ 2137 ie wc1h 24m
23 Sep 2020 @ 2013 wc long1h 36m
23 Sep 2020 @ 1837 wc long1h 36m
23 Sep 2020 @ 1701 wc long1h 34m
23 Sep 2020 @ 1527 wc long4m 2s 1h 37m
23 Sep 2020 @ 1350 wc long3m 56s 1h 37m
23 Sep 2020 @ 1213 wc long3m 53s 1h 31m
23 Sep 2020 @ 1042 wc long1h 24m
23 Sep 2020 @ 0918 wc long1h 33m
23 Sep 2020 @ 0745 wc long4m 4s 3h 8m
23 Sep 2020 @ 0437 wc long1h 37m
23 Sep 2020 @ 0300 wc long1h 40m
23 Sep 2020 @ 0120 wc long1h 30m
22 Sep 2020 @ 2350 wc long1h 41m
22 Sep 2020 @ 2209 wc long1h 40m
22 Sep 2020 @ 2029 wc long1h 30m
22 Sep 2020 @ 1859 wc long1h 35m
22 Sep 2020 @ 1724 wc long2h 0m
22 Sep 2020 @ 1524 wc long4m 33s 1h 6m
22 Sep 2020 @ 1418 wc short1m 55s 1h 37m
22 Sep 2020 @ 1241 wc long4m 16s 1h 32m
22 Sep 2020 @ 1109 wc long3m 52s 1h 38m
22 Sep 2020 @ 0931 wc long1h 34m
22 Sep 2020 @ 0757 wc long1h 37m
22 Sep 2020 @ 0620 wc long1h 45m
22 Sep 2020 @ 0435 wc long1h 40m
22 Sep 2020 @ 0255 wc long1h 41m
22 Sep 2020 @ 0114 wc long1h 32m
21 Sep 2020 @ 2342 wc long1h 45m

Interval Statistics

Interval Count100
Min59m
Max4h 45m
Mean1h 38m
Median1h 37m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16179 18 Sep 2020 @ 1656 --- hkoenig First observed and reported eruption, late afternoon, 1870 Sep 18.
15361 04 Aug 2020 @ 1442 --- JarnoO (wc) Big preplay for 43s starting @ 1442:28, with multiple jets sent skywards, but to no avail.
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]
15886 20 Dec 1997 @ 0950 --- JarnoO {no time given for a long eruption}; prediction 0950
15857 30 Aug 1997 @ 0853 30 Aug 1997 @ 1957 JarnoO {duration column is identical to interval column, therefore no durations nor long/short}
15814 16 Apr 1997 @ 0000 16 Apr 1997 @ 2359 JarnoO none reported
15804 10 Feb 1997 @ 1200 --- JarnoO {generic time}; average interval for all but shorts (from start of logbook thru today) is ~84 minutes
15791 03 Jan 1997 @ 1600 03 Jan 1997 @ 1609 JarnoO 16:0x ie
15339 15 Dec 1996 @ 0000 15 Dec 1996 @ 2359 JarnoO no Old Faithful eruptions noted
15175 20 Jan 1996 @ 1703 --- JarnoO preplay 1703; prediction 1659; {no eruption time given}
14450 22 Dec 1995 @ 0418 22 Dec 1995 @ 0700 JarnoO obscured; 0537
14449 20 Dec 1995 @ 0313 20 Dec 1995 @ 0930 JarnoO obscured
14446 16 Dec 1995 @ 2212 17 Dec 1995 @ 0042 JarnoO obscured
14444 08 Dec 1995 @ 0009 08 Dec 1995 @ 1444 JarnoO break
14443 06 Dec 1995 @ 0928 06 Dec 1995 @ 1209 JarnoO obscured
14430 14 Nov 1995 @ 2309 15 Nov 1995 @ 0114 JarnoO obscured
14429 04 Nov 1995 @ 1403 --- JarnoO John Railley minor
14417 25 Oct 1995 @ 1624 --- JarnoO preplay d=27s; h~30'
14391 18 Sep 1995 @ 0850 --- JarnoO preplay d=33s; h~30'
14374 02 Sep 1995 @ 0000 02 Sep 1995 @ 2359 JarnoO Today we had a 39 sec., 24 sec., 22 sec. continual preplay splash
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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