Last Known Eruption
40m ago
Predicted Next Eruption
Today at 1038 ± 13 minutes

Latest Eruptions

Eruption DurationInterval
19 Apr 2021 @ 0901 wc long1h 31m
19 Apr 2021 @ 0730 wc long1h 38m
19 Apr 2021 @ 0552 wc long9h 38m
18 Apr 2021 @ 2014 long3m 26s 1h 38m
18 Apr 2021 @ 1836 wc long1h 27m
18 Apr 2021 @ 1709 wc long1h 53m
18 Apr 2021 @ 1515:01 wc long4m 14s 1h 41m
18 Apr 2021 @ 1334 wc long1h 34m
18 Apr 2021 @ 1200 wc long1h 45m
18 Apr 2021 @ 1015 ns wc long1h 28m
18 Apr 2021 @ 0847 ns wc long1h 51m
18 Apr 2021 @ 0656 wc long1h 32m
18 Apr 2021 @ 0524 wc long9h 32m
17 Apr 2021 @ 1952 wc long1h 31m
17 Apr 2021 @ 1821 wc long1h 45m
17 Apr 2021 @ 1636 wc long1h 28m
17 Apr 2021 @ 1508 wc long1h 41m
17 Apr 2021 @ 1327 wc long1h 40m
17 Apr 2021 @ 1146:35 wc long4m 2s 1h 32m
17 Apr 2021 @ 1014 wc long1h 46m
17 Apr 2021 @ 0828 ie wc long1h 23m
17 Apr 2021 @ 0705 wc long1h 41m
17 Apr 2021 @ 0524 wc long9h 44m
16 Apr 2021 @ 1939:13 wc long4m 31s 1h 36m 55s
16 Apr 2021 @ 1802:18 wc long3m 59s 1h 33m
16 Apr 2021 @ 1629 ns wc long1h 30m
16 Apr 2021 @ 1458:48 wc long4m 12s 1h 39m
16 Apr 2021 @ 1319 wc long1h 12m
16 Apr 2021 @ 1207 wc short1h 45m
16 Apr 2021 @ 1022 wc long1h 30m
16 Apr 2021 @ 0852 wc long1h 42m
16 Apr 2021 @ 0710 wc long1h 39m
16 Apr 2021 @ 0531 wc9h 36m
15 Apr 2021 @ 1955 wc long1h 31m
15 Apr 2021 @ 1824 wc long1h 43m
15 Apr 2021 @ 1641 wc long1h 37m
15 Apr 2021 @ 1504 wc long1h 12m
15 Apr 2021 @ 1352 wc short1m 55s 1h 44m
15 Apr 2021 @ 1208 ns wc long1h 39m
15 Apr 2021 @ 1029 ie wc1h 50m
15 Apr 2021 @ 0839 wc long1h 34m
15 Apr 2021 @ 0705 wc long1h 38m
15 Apr 2021 @ 0527 wc long8h 0m
14 Apr 2021 @ 2127 wc1h 34m
14 Apr 2021 @ 1953 wc long1h 44m
14 Apr 2021 @ 1809 wc long1h 48m
14 Apr 2021 @ 1621 wc1h 35m
14 Apr 2021 @ 1446 wc3m 24s 1h 42m
14 Apr 2021 @ 1304 wc long1h 30m
14 Apr 2021 @ 1134 wc long1h 40m
14 Apr 2021 @ 0954 wc long4m 48s 1h 7m
14 Apr 2021 @ 0847 wc short1h 44m
14 Apr 2021 @ 0703 ie wc1h 2m
14 Apr 2021 @ 0601 wc short9h 34m
13 Apr 2021 @ 2027 ie wc long1h 36m
13 Apr 2021 @ 1851 ns wc1h 39m
13 Apr 2021 @ 1712 ns wc1h 24m
13 Apr 2021 @ 1548 wc long4m 30s 1h 34m
13 Apr 2021 @ 1414 wc long4m 24s 1h 41m
13 Apr 2021 @ 1233 ns wc1h 41m
13 Apr 2021 @ 1052 ns wc1h 30m
13 Apr 2021 @ 0922 ns wc long1h 39m
13 Apr 2021 @ 0743 ns wc1h 31m
13 Apr 2021 @ 0612 ns wc12h 30m
12 Apr 2021 @ 1742 ns wc1h 38m
12 Apr 2021 @ 16041h 43m
12 Apr 2021 @ 14213m 43s 1h 34m
12 Apr 2021 @ 12473m 27s 1h 39m
12 Apr 2021 @ 11083m 44s 1h 35m
12 Apr 2021 @ 09333m 39s 1h 24m
12 Apr 2021 @ 08092m 56s 1h 48m
12 Apr 2021 @ 0621 ns wc11h 0m
11 Apr 2021 @ 1921 ns wc1h 30m
11 Apr 2021 @ 1751 ns wc1h 45m
11 Apr 2021 @ 1606 ie wc1h 32m
11 Apr 2021 @ 1434 ns wc1h 40m
11 Apr 2021 @ 1254 ns wc1h 9m
11 Apr 2021 @ 1145 ns wc short1h 35m
11 Apr 2021 @ 1010 ns wc long1h 41m
11 Apr 2021 @ 0829 ns wc long1h 39m
11 Apr 2021 @ 0650 ns wc14h 31m
10 Apr 2021 @ 1619 ns wc long1h 31m
10 Apr 2021 @ 1448 ns wc long1h 38m
10 Apr 2021 @ 1310 ns wc long1h 16m
10 Apr 2021 @ 1154 ns wc short1h 38m
10 Apr 2021 @ 1016 ie wc long1h 33m
10 Apr 2021 @ 0843 ns wc1h 45m
10 Apr 2021 @ 0658 ns wc12h 33m
09 Apr 2021 @ 1825 ns wc1h 38m
09 Apr 2021 @ 1647 ns wc long1h 34m
09 Apr 2021 @ 1513 ns wc long1h 41m
09 Apr 2021 @ 13321h 45m
09 Apr 2021 @ 1147 ie wc long1h 49m
09 Apr 2021 @ 0958 ns wc long1h 31m
09 Apr 2021 @ 0827 ns wc1h 30m
09 Apr 2021 @ 0657 ns wc14h 43m
08 Apr 2021 @ 1614 ns wc1h 18m
08 Apr 2021 @ 1456 ns wc short1h 35m
08 Apr 2021 @ 1321 ie wc long1h 48m
08 Apr 2021 @ 1133 ns wc long1h 46m

Interval Statistics

Interval Count100
Min1h 2m
Max14h 43m
Mean2h 37m
Median1h 38m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16868 23 Mar 2021 @ 0652 --- JarnoO About 10-15m post eruption
16867 21 Mar 2021 @ 1506 21 Mar 2021 @ 1532 Betty no VEC static frames in that range of time, so OF eruption was missed
16864 12 Mar 2021 @ 1738 --- JarnoO Just post-eruptive, no frames between 1726 and 1738
16862 04 Mar 2021 @ 1620 --- JarnoO Post-eruptive. Frames 1615 through 1619 missing
16853 18 Feb 2021 @ 1621 --- JarnoO Appears post-eruptive. 1615-1620 frames are missing, however, thus time is unknown other than somewhere there between.
16829 25 Jan 2021 @ 1804 --- JarnoO (wc) Post-eruptive based on lack of activity and steam plume in the following minutes. As cam panned over @ 1804, the cone itself appeared steamy as well, which decreased in the minutes that followed.
16783 08 Dec 2020 @ 0911 --- JarnoO One frame with very large preplay. Subsequent frames show nothing and at 0919 it completely fogged in. When fog had cleared @ 0943, all that remained was a lightly steaming cone. Makes it plausible that 0911 was a large false start inducing preplay delay.
16781 07 Dec 2020 @ 1434 --- JarnoO prediction GT 1438; well post-eruptive, only a steamy cone remaining; 1421 through 1433 frames missing
16513 27 Nov 2020 @ 1232 --- JarnoO prediction GT 1236; very recently post-eruptive; no frames between 1129 and 1231
16512 24 Nov 2020 @ 1641 --- JarnoO prediction GT 1634; post-eruptive on this frame. Frames 1613 through 1640 missing.
16510 20 Nov 2020 @ 1029 --- JarnoO prediction GT 1028; post-eruptive on 1029 frame or nearly so. No static frames between 1009 and 1029.
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]
16773 15 Dec 1998 @ 1709 --- JarnoO prediction 1709
16640 20 May 1998 @ 0803 --- JarnoO preplay 0803; {no eruption time given}
16575 07 Feb 1998 @ 1756 --- JarnoO preplay 1756; prediction 1805
16566 24 Jan 1998 @ 1728 --- JarnoO prediction 1728
16522 10 Jan 1998 @ 1710 --- JarnoO preplay 1656; prediction 1710
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.