Last Known Eruption
1h 30m ago
Predicted Next Eruption
Today at 0923 ± 13 minutes

Latest Eruptions

Eruption DurationInterval
21 Oct 2021 @ 0746 wc long12h 4m
20 Oct 2021 @ 1942 wc long1h 13m
20 Oct 2021 @ 1829 wc short1h 46m
20 Oct 2021 @ 1643 ns wc long52m
20 Oct 2021 @ 1551 ns wc short1h 51m
20 Oct 2021 @ 1400 wc long1h 3m
20 Oct 2021 @ 1257 short1m 47s 1h 46m
20 Oct 2021 @ 1111 wc long55m
20 Oct 2021 @ 1016 short1m 1h 57m
20 Oct 2021 @ 0819 wc long1h 0m
20 Oct 2021 @ 0719 wc short1h 44m
20 Oct 2021 @ 0535 wc long6h 20m
19 Oct 2021 @ 2315 ie wc1h 28m
19 Oct 2021 @ 2147 ie wc3h 24m
19 Oct 2021 @ 1823 wc long1h 28m
19 Oct 2021 @ 1655 long1h 43m
19 Oct 2021 @ 1512 wc long1h 44m
19 Oct 2021 @ 1328 ns wc long1h 23m
19 Oct 2021 @ 1205 wc long1h 53m
19 Oct 2021 @ 1012 wc long1h 37m
19 Oct 2021 @ 0835 wc long12h 53m
18 Oct 2021 @ 19424m 1h 39m
18 Oct 2021 @ 1803 wc long1h 38m
18 Oct 2021 @ 1625 wc long1h 38m
18 Oct 2021 @ 1447 wc long1h 30m
18 Oct 2021 @ 1317 wc long1h 47m
18 Oct 2021 @ 1130 wc long1h 45m
18 Oct 2021 @ 0945 wc long1h 41m
18 Oct 2021 @ 0804 wc long13h 3m
17 Oct 2021 @ 1901 wc long1h 44m
17 Oct 2021 @ 1717 wc long1h 38m
17 Oct 2021 @ 1539 wc long1h 42m
17 Oct 2021 @ 1357 wc long1h 50m
17 Oct 2021 @ 1207 wc long1h 43m
17 Oct 2021 @ 1024 wc long1h 30m
17 Oct 2021 @ 0854 wc long1h 48m
17 Oct 2021 @ 0706 wc long8h 57m
16 Oct 2021 @ 2209 ie wc1h 32m
16 Oct 2021 @ 2037 ns wc long1h 30m
16 Oct 2021 @ 1907 ie wc long3h 12m
16 Oct 2021 @ 1554:44 wc long3m 58s 1h 41m 13s
16 Oct 2021 @ 1413:31 wc long3m 56s 1h 28m
16 Oct 2021 @ 1245 wc long1h 35m
16 Oct 2021 @ 1110 wc long1h 14m
16 Oct 2021 @ 0956 wc short1h 40m
16 Oct 2021 @ 0816 wc long1h 28m
16 Oct 2021 @ 0648 wc long9h 55m
15 Oct 2021 @ 2053 wc1h 31m
15 Oct 2021 @ 1922 wc1h 33m
15 Oct 2021 @ 1748:14 wc>3m 0s 1h 41m 27s
15 Oct 2021 @ 1606:47 wc long4m 12s 1h 26m 29s
15 Oct 2021 @ 1440:18 wc long3m 30s 1h 42m
15 Oct 2021 @ 1258 ns wc long1h 29m
15 Oct 2021 @ 1129 wc long1h 49m
15 Oct 2021 @ 0940 wc long1h 28m
15 Oct 2021 @ 0812 wc long12h 42m
14 Oct 2021 @ 1930 wc long1h 34m
14 Oct 2021 @ 1756 wc long1h 34m
14 Oct 2021 @ 1622 ns wc long1h 26m
14 Oct 2021 @ 1456 wc long1h 41m
14 Oct 2021 @ 1315 wc long1h 34m
14 Oct 2021 @ 1141 wc long1h 45m
14 Oct 2021 @ 0956 wc long1h 39m
14 Oct 2021 @ 0817 wc long16h 1m
13 Oct 2021 @ 1616 long1h 47m
13 Oct 2021 @ 1429 wc long1h 41m
13 Oct 2021 @ 1248 wc long1h 38m
13 Oct 2021 @ 1110 wc1h 41m
13 Oct 2021 @ 0929 wc long1h 32m
13 Oct 2021 @ 0757 wc long14h 43m
12 Oct 2021 @ 1714 wc long1h 55m
12 Oct 2021 @ 1519 wc long1h 26m
12 Oct 2021 @ 1353 ie wc long1h 43m
12 Oct 2021 @ 1210 ie wc long1h 31m
12 Oct 2021 @ 1039 wc long1h 38m
12 Oct 2021 @ 0901 wc long1h 31m
12 Oct 2021 @ 0730 wc long1h 42m
12 Oct 2021 @ 0548 wc long1h 27m
12 Oct 2021 @ 0421 wc long1h 56m
12 Oct 2021 @ 0225 wc long8h 26m
11 Oct 2021 @ 1759 wc long1h 42m
11 Oct 2021 @ 1617 wc long1h 38m
11 Oct 2021 @ 1438:04 wc long4m 20s 1h 32m 55s
11 Oct 2021 @ 1305:09 wc long3m 58s 1h 45m 42s
11 Oct 2021 @ 1119:27 wc long4m 30s 1h 3m
11 Oct 2021 @ 1016 wc short1h 32m
11 Oct 2021 @ 0844 wc long1h 39m
11 Oct 2021 @ 0705 wc long13h 5m
10 Oct 2021 @ 1800 wc long1h 40m
10 Oct 2021 @ 1620 wc long1h 40m
10 Oct 2021 @ 1440 wc long1h 40m
10 Oct 2021 @ 1300 wc long1h 17m
10 Oct 2021 @ 1143 wc short1h 36m
10 Oct 2021 @ 1007 wc long1h 30m
10 Oct 2021 @ 0837 wc long14h 25m
09 Oct 2021 @ 1812 wc1h 34m
09 Oct 2021 @ 1638 wc long1h 41m
09 Oct 2021 @ 1457 long1h 37m
09 Oct 2021 @ 1319:30 wc long3m 52s 1h 42m
09 Oct 2021 @ 1137 wc long1h 7m

Interval Statistics

Interval Count100
Min52m
Max16h 1m
Mean2h 51m
Median1h 40m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
19762 28 Sep 2021 @ 0632 --- Kat OF looks post-eruptive when cam moved to check
17015 09 May 2021 @ 1053 --- JoeN steam devil video https://youtu.be/tCDtR4w0ROQ
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 May 2021 @ 1105 JoeN https://youtu.be/tCDtR4w0ROQ steamdevil
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.
Baseline does not exist.