Last Known Eruption
1h 9m ago
Predicted Next Eruption
Today at 1500 ± 13 minutes

Latest Eruptions

Eruption DurationInterval
20 Feb 2020 @ 1323 wc long1h 33m
20 Feb 2020 @ 1150 wc long1h 39m
20 Feb 2020 @ 1011 ie wc long1h 28m
20 Feb 2020 @ 0843 wc long1h 36m
20 Feb 2020 @ 0707 wc long1h 32m
20 Feb 2020 @ 0535 wc long1h 33m
20 Feb 2020 @ 0402 wc long9h 22m
19 Feb 2020 @ 1840 ns wc long1h 37m
19 Feb 2020 @ 1703 ns wc long1h 30m
19 Feb 2020 @ 1533 wc long1h 48m
19 Feb 2020 @ 1345 wc long1h 25m
19 Feb 2020 @ 1220 wc long1h 38m
19 Feb 2020 @ 1042 wc long1h 30m
19 Feb 2020 @ 0912 ns wc long1h 24m
19 Feb 2020 @ 0748 ns wc long1h 44m
19 Feb 2020 @ 0604 wc long1h 25m
19 Feb 2020 @ 0439 ie wc10h 58m
18 Feb 2020 @ 1741 ns wc long1h 41m
18 Feb 2020 @ 1600 wc long1h 32m
18 Feb 2020 @ 1428 wc long1h 36m
18 Feb 2020 @ 1252 wc long1h 34m
18 Feb 2020 @ 1118 wc long1h 30m
18 Feb 2020 @ 0948 wc long1h 31m
18 Feb 2020 @ 0817 wc14h 4m
17 Feb 2020 @ 1813 ns wc long1h 38m
17 Feb 2020 @ 1635 ns wc long1h 29m
17 Feb 2020 @ 1506 wc long1h 43m
17 Feb 2020 @ 1323 wc long1h 31m
17 Feb 2020 @ 1152 wc long1h 37m
17 Feb 2020 @ 1015 wc long1h 40m
17 Feb 2020 @ 0835 ie wc long1h 24m
17 Feb 2020 @ 0711 wc long1h 38m
17 Feb 2020 @ 0533 ns wc long11h 34m
16 Feb 2020 @ 1759 ns wc1h 41m
16 Feb 2020 @ 1618 wc long1h 8m
16 Feb 2020 @ 1510 short1h 43m
16 Feb 2020 @ 1327 wc long1h 34m
16 Feb 2020 @ 1153 wc long1h 45m
16 Feb 2020 @ 1008 wc long1h 37m
16 Feb 2020 @ 0831 wc long1h 36m
16 Feb 2020 @ 0655 wc long1h 36m
16 Feb 2020 @ 0519 wc long10h 48m
15 Feb 2020 @ 1831 wc long1h 28m
15 Feb 2020 @ 1703 wc long1h 39m
15 Feb 2020 @ 1524 wc long1h 27m
15 Feb 2020 @ 1357 wc long1h 40m
15 Feb 2020 @ 1217 wc long1h 25m
15 Feb 2020 @ 1052 wc long1h 37m
15 Feb 2020 @ 0915 ns wc long1h 28m
15 Feb 2020 @ 0747 wc long1h 34m
15 Feb 2020 @ 0613 wc long1h 38m
15 Feb 2020 @ 0435 wc long9h 16m
14 Feb 2020 @ 1919 wc long56m
14 Feb 2020 @ 1823 wc short1h 32m
14 Feb 2020 @ 1651 wc long1h 43m
14 Feb 2020 @ 1508 wc long1h 25m
14 Feb 2020 @ 1343 ns wc long1h 29m
14 Feb 2020 @ 1214 ns wc long1h 36m
14 Feb 2020 @ 1038 ns wc long1h 32m
14 Feb 2020 @ 0906 ns wc long1h 34m
14 Feb 2020 @ 0732 wc long1h 56m
14 Feb 2020 @ 0536 wc long1h 25m
14 Feb 2020 @ 0411 wc long4h 56m
13 Feb 2020 @ 2315 wc long1h 40m
13 Feb 2020 @ 2135 wc long1h 44m
13 Feb 2020 @ 1951 wc long1h 31m
13 Feb 2020 @ 1820 wc long1h 39m
13 Feb 2020 @ 1641 wc long1h 37m
13 Feb 2020 @ 1504 wc long1h 33m
13 Feb 2020 @ 1331 wc long1h 42m
13 Feb 2020 @ 1149 wc long1h 42m
13 Feb 2020 @ 1007 wc long1h 40m
13 Feb 2020 @ 0827 long1h 34m
13 Feb 2020 @ 0653 wc long1h 26m
13 Feb 2020 @ 0527 wc long1h 35m
13 Feb 2020 @ 0352 wc long8h 0m
12 Feb 2020 @ 1952 wc long1h 28m
12 Feb 2020 @ 1824 wc long1h 38m
12 Feb 2020 @ 1646 wc long1h 42m
12 Feb 2020 @ 1504 ns wc long1h 26m
12 Feb 2020 @ 1338 wc long1h 40m
12 Feb 2020 @ 1158 wc long1h 38m
12 Feb 2020 @ 1020 wc long1h 36m
12 Feb 2020 @ 08441h 33m
12 Feb 2020 @ 0711 ns wc long1h 38m
12 Feb 2020 @ 0533 wc1h 34m
12 Feb 2020 @ 0359 wc long9h 20m
11 Feb 2020 @ 1839 ns wc long1h 47m
11 Feb 2020 @ 1652 ns wc long1h 31m
11 Feb 2020 @ 1521 wc long1h 47m
11 Feb 2020 @ 1334 long1h 29m
11 Feb 2020 @ 1205 wc long1h 32m
11 Feb 2020 @ 1033 wc long1h 36m
11 Feb 2020 @ 0857 wc long1h 24m
11 Feb 2020 @ 0733 wc long1h 39m
11 Feb 2020 @ 0554 wc long1h 30m
11 Feb 2020 @ 0424 wc long6h 12m
10 Feb 2020 @ 2212 wc long1h 26m
10 Feb 2020 @ 2046 ie wc long3h 7m
10 Feb 2020 @ 1739 wc long1h 44m

Interval Statistics

Interval Count100
Min56m
Max14h 4m
Mean2h 22m
Median1h 36m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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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