Last Known Eruption
4h 13m ago
Predicted Next Eruption
Today at 1836 ± 45 minutes

Latest Eruptions

Eruption DurationInterval
20 Feb 2019 @ 0351 wc maj3h 47m
20 Feb 2019 @ 0004 wc min13h 35m
19 Feb 2019 @ 1029 ns wc maj1d 23h 39m
17 Feb 2019 @ 1050 wc maj4h 52m
17 Feb 2019 @ 0558 wc min13h 27m
16 Feb 2019 @ 1631 wc maj13h 39m
16 Feb 2019 @ 0252 ? ie wc maj14h 2m
15 Feb 2019 @ 1250 wc maj11h 48m
15 Feb 2019 @ 0102 ? ie wc15h 38m
14 Feb 2019 @ 0924 maj1d 2h 51m
13 Feb 2019 @ 0633 ie wc maj14h 42m
12 Feb 2019 @ 1551 ie wc maj4h 27m
12 Feb 2019 @ 1124 ie wc min1d 5h 36m
11 Feb 2019 @ 0548 ns wc maj12h 10m
10 Feb 2019 @ 1738 wc1d 4h 12m
09 Feb 2019 @ 1326 wc13h 43m
08 Feb 2019 @ 2343 wc maj13h 42m
08 Feb 2019 @ 1001 ie maj1d 2h 3m
07 Feb 2019 @ 0758 ie maj16h 35m
06 Feb 2019 @ 1523 ie2d 7h 30m
04 Feb 2019 @ 0753 wc maj14h 47m
03 Feb 2019 @ 1706 ie wc maj8h 47m
03 Feb 2019 @ 0819 wc min13h 6m
02 Feb 2019 @ 1913 ie wc13h 41m
02 Feb 2019 @ 0532 ns wc maj14h 29m
01 Feb 2019 @ 1503 E maj21h 44m
31 Jan 2019 @ 1719 A wc maj11h 55m
31 Jan 2019 @ 0523:11 wc maj5h 8m 26s
31 Jan 2019 @ 0014:45 wc min~6m 14h 5m
30 Jan 2019 @ 1009 wc maj20h 48m
29 Jan 2019 @ 1321 ie wc maj4h 16m
29 Jan 2019 @ 0905 ie wc min14h 25m
28 Jan 2019 @ 1840 wc maj5h 26m
28 Jan 2019 @ 1314 ie wc min13h 34m
27 Jan 2019 @ 2340 wc maj14h 55m
27 Jan 2019 @ 0845 wc maj5h 14m
27 Jan 2019 @ 0331 wc min14h 19m
26 Jan 2019 @ 1312 wc maj3h 44m
26 Jan 2019 @ 0928 wc min14h 43m
25 Jan 2019 @ 1845 ns wc maj11h 43m
25 Jan 2019 @ 0702 wc min14h 22m
24 Jan 2019 @ 1640 wc maj6h 46m
24 Jan 2019 @ 0954 min13h 38m
23 Jan 2019 @ 2016 wc maj14h 0m
23 Jan 2019 @ 0616 wc maj14h 33m
22 Jan 2019 @ 1543 wc maj8h 42m
22 Jan 2019 @ 0701 ie wc min13h 30m
21 Jan 2019 @ 1731 maj1d 3h 22m
20 Jan 2019 @ 1409 wc maj13h 19m
20 Jan 2019 @ 0050 ? ie wc maj13h 56m
19 Jan 2019 @ 1054 ns wc maj13h 54m
18 Jan 2019 @ 2100 wc maj14h 19m
18 Jan 2019 @ 0641 ie wc maj14h 30m
17 Jan 2019 @ 1611 ie wc maj14h 13m
17 Jan 2019 @ 0158 wc maj12h 26m
16 Jan 2019 @ 1332 wc min4h 59m
16 Jan 2019 @ 0833 wc min14h 10m
15 Jan 2019 @ 1823 ie wc maj5h 39m
15 Jan 2019 @ 1244 wc min13h 13m
14 Jan 2019 @ 2331 wc maj13h 44m
14 Jan 2019 @ 0947 wc maj13h 45m
13 Jan 2019 @ 2002 wc maj13h 41m
13 Jan 2019 @ 0621 wc maj14h 38m
12 Jan 2019 @ 1543 wc maj4h 42m
12 Jan 2019 @ 1101 ie wc min14h 55m
11 Jan 2019 @ 2006 ie wc maj5h 40m
11 Jan 2019 @ 1426 wc min13h 39m
11 Jan 2019 @ 0047 wc maj13h 48m
10 Jan 2019 @ 1059 wc maj14h 19m
09 Jan 2019 @ 2040 wc maj13h 44m
09 Jan 2019 @ 0656 wc maj14h 42m
08 Jan 2019 @ 1614 wc maj5h 55m
08 Jan 2019 @ 1019 wc min13h 35m
07 Jan 2019 @ 2044 wc maj1d 4h 1m
06 Jan 2019 @ 1643 ie wc maj1d 3h 42m
05 Jan 2019 @ 1301 maj48m 40s 14h 38m
04 Jan 2019 @ 2223 wc maj5h 41m
04 Jan 2019 @ 164218m 40s 1d 3h 35m
03 Jan 2019 @ 1307 wc maj14h 30m
02 Jan 2019 @ 2237 A wc maj3h 52m
02 Jan 2019 @ 1845 wc min14h 11m
02 Jan 2019 @ 0434 wc maj9h 36m
01 Jan 2019 @ 1858 wc min1d 3h 23m
31 Dec 2018 @ 1535 wc maj14h 5m
31 Dec 2018 @ 0130 wc13h 57m
30 Dec 2018 @ 1133 wc maj14h 7m
29 Dec 2018 @ 2126 wc maj14h 51m
29 Dec 2018 @ 0635 wc maj6h 1m
29 Dec 2018 @ 0034 wc min14h 37m
28 Dec 2018 @ 0957 wc maj20h 28m
27 Dec 2018 @ 1329 wc maj14h 5m
26 Dec 2018 @ 2324 wc maj13h 24m
26 Dec 2018 @ 1000 ie wc maj1d 2h 32m
25 Dec 2018 @ 0728 ie wc maj14h 32m
24 Dec 2018 @ 1656 wc maj13h 35m
24 Dec 2018 @ 0321 wc maj13h 32m
23 Dec 2018 @ 1349 wc maj13h 35m
23 Dec 2018 @ 0014 wc maj13h 38m
22 Dec 2018 @ 1036 wc maj13h 45m
21 Dec 2018 @ 2051 wc maj13h 40m

Interval Statistics

Interval Count100
Min3h 44m
Max2d 7h 30m
Mean14h 36m
Median13h 46m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10759 02 Dec 2018 @ 0341 --- JSJ GOSA playback shows a Castle eruption at 0341 with a more slender steam column than the 2204 eruption. Steam column present to about 0430 at least, when visibility was lost.
10696 01 Nov 2018 @ 1115 --- mhvogel According to the electronic download castle had a minor @ 0326. I didn't see any other eruptions from castle on the download after that time.
10322 21 Sep 2018 @ 1317 --- Minafuku Castle doing lots of high splashes for being only halfway through its cycle. Apparently has been for awhile already.
10264 16 Sep 2018 @ 1804 --- STS New NPS prediction of 0515 on September 17
9866 25 Aug 2018 @ 0758 --- Minafuku Quiet. Major overnight.
9268 22 Jul 2018 @ 0553 --- JimS Sloshing. Overnight eruption was a minor.
8413 02 Jun 2018 @ 1237 --- DaveM Duration was 4 minutes. Geysertimes chose a less complete entry submitted 7 minutes after the eruption over a webcam entry. I find the bias of the software disturbing. A more complete entry should be listed as primary whether is is submitted immediately or much later or if it is seen in person or on the webcam.
8235 19 May 2018 @ 0934 --- JimS Sloshing vigorously. Had a minor overnight.
8044 29 Apr 2018 @ 2134 --- Micah Kipple beginning to transition into steam
7963 31 Mar 2018 @ 2218 --- Pat Snyder Might have minored. IE at 2211, off by 2217. I didn't see the start, though.
7878 27 Jan 2018 @ 1400 --- Graham Not in steam phase. must have had a minor. No eruption seen during my wait for Grand.
7701 10 Oct 2017 @ 1516 --- JSJ Castle off-camera, but patches of billowing steam consistent with an eruption first visible on web camera at 1516.
7532 29 Sep 2017 @ 0741 --- JimS Sloshing. Probably Had a minor eruption overnight.
7444 27 Sep 2017 @ 0903 --- JimS Sloshing. Had a second minor eruption overnight.
7258 25 Sep 2017 @ 0700 --- JimS Quiet. Had a major eruption overnight.
7027 23 Sep 2017 @ 0738 --- JimS Sloshing. Had a minor eruption overnight.
6749 18 Sep 2017 @ 0730 --- JimS Quiet. Had a major eruption overnight.
6628 17 Sep 2017 @ 0726 --- JimS Sloshing. Had a minor eruption overnight.
6364 14 Sep 2017 @ 0657 --- JimS Quiet. Had a major eruption overnight.
6271 11 Sep 2017 @ 0649 --- JimS Sloshing. Had a minor eruption overnight.
6263 10 Sep 2017 @ 1422 --- Betty Seems to be ie, but Castle is out of webcam view and only drifting steam is visible
5798 05 Sep 2017 @ 0631 --- JimS Quiet. Had a major eruption overnight.
5667 03 Sep 2017 @ 0804 --- JimS Sloshing. Had a minor eruption.
5568 02 Sep 2017 @ 0628 --- JimS Quiet. Had a major eruption overnight.
5398 26 Aug 2017 @ 0745 --- JimS Sloshing. Had a minor eruption.
5316 25 Aug 2017 @ 0625 --- JimS Quiet. Had a major eruption overnight.
5308 24 Aug 2017 @ 1446 --- LotusBaker castle is a major
5298 24 Aug 2017 @ 0600 --- JimS Quiet. Had a major eruption overnight.
5275 23 Aug 2017 @ 0610 23 Aug 2017 @ 0630 JimS Sloshing. Had a minor eruption early this morning.
5196 22 Aug 2017 @ 0616 --- JimS Quiet. Had a major eruption overnight.
4887 14 Aug 2017 @ 0640 --- JimS Quiet. Had a major eruption overnight.
4810 06 Aug 2017 @ 0553 --- JimS Quiet. Had a major eruption overnight.
4802 05 Aug 2017 @ 0600 --- JimS Quiet. Had a major eruption overnight.
4778 04 Aug 2017 @ 0616 --- EmilyW Sloshing, minored overnight
4753 03 Aug 2017 @ 0554 --- JimS Sloshing. overnight eruption was a minor.
4590 01 Aug 2017 @ 0711 --- JimS Apparently had a minor eruption early this morning.
4587 31 Jul 2017 @ 0831 --- EmilyW Sloshing, castle minored overnight
4532 25 Jul 2017 @ 0755 --- EmilyW Quiet, majored overnight
4520 24 Jul 2017 @ 0630 --- JimS Quiet. Had a major eruption overnight.
4507 20 Jul 2017 @ 0527 --- JimS Quiet. Had a major eruption overnight after the minor yesterday evening.
4475 17 Jul 2017 @ 0638 --- SteveO minor overninght
4471 16 Jul 2017 @ 0532 --- JimS Quiet. Had a major eruption overnight.
4465 15 Jul 2017 @ 0517 --- JimS Quiet. Had a major eruption sometime overnight.
4442 11 Jul 2017 @ 0632 --- JimS Quiet. Had a major eruption overnight.
4433 10 Jul 2017 @ 1441 --- udo Prediction from 724Victor = 1530 +/-45
4431 10 Jul 2017 @ 0630 --- JimS Quiet. Had a major eruption sometime overnight.
4407 05 Jul 2017 @ 0622 --- JimS Quiet. Had a major eruption sometime overnight.
4404 04 Jul 2017 @ 0550 --- JimS Sloshing. Had a minor eruption overnight.
4366 27 Jun 2017 @ 0524 --- JimS Quiet. Had a major eruption overnight.
4316 15 Jun 2017 @ 0625 --- B**2 Castle is in steam phase of eruption.
4187 03 Jun 2017 @ 0618 --- JimS Quiet. Had a major eruption sometime overnight.
4173 02 Jun 2017 @ 0655 02 Jun 2017 @ 0710 JimS Sloshing. Had a minor eruption sometime overnight.
4162 01 Jun 2017 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
4155 31 May 2017 @ 0554 --- JimS Sloshing. Had a minor eruption sometime overnight.
4137 27 May 2017 @ 0620 --- SteveO Castle in very late steam phase, roaring and no water.
4116 23 May 2017 @ 0515 --- SteveO Major overnight, still a little forced steam.
4097 16 May 2017 @ 0541 --- JimS Sloshing. No major eruption yet.
4040 05 May 2017 @ 0545 --- JimS Quiet. Most recent eruption was a major
3924 24 Jan 2017 @ 2103 --- Casey Dark, but appears to be ie edit: still significant steam at 2207
3920 24 Jan 2017 @ 0629 --- Kitt B large steam cloud on cam, possibly ie, but too dark to see water
3904 29 Dec 2016 @ 1051 --- Kevin L Very foggy but it looked like Castle may have been ie. Fog downbasin may have been the result of a Castle eruption since it appeared that there was a steam phase plume at 1118 and the fog cleared shortly after that.
3780 13 Oct 2016 @ 1200 --- udo Castle has been jetting frequently 6 to 20 feet all afternoon as if it had a minor. It was quiet earlier in the morning. A bit odd.
3765 09 Oct 2016 @ 0759 --- Kitt B Castle had a major before 7am, boardwalk icy, path wet, and Castle quiet.
3733 01 Oct 2016 @ 0843 --- Kitt B Castle minored
3730 30 Sep 2016 @ 0530 --- Kitt B Dan told me he heard Castle in steam phase. I saw some splashing from Castle, but then I left the basin to check on Great Fountain.
3689 19 Sep 2016 @ 2320 --- Casey Webcam observer mentioned short period of activity. If found to have had a minor eruption overnight, it was probably ie 2320.
3683 18 Sep 2016 @ 0645 --- JimS Quiet. Had a major eruption sometime overnight.
3665 15 Sep 2016 @ 0638 --- JimS Still sloshing from minor.
3657 14 Sep 2016 @ 0648 --- JimS Sloshing. Had a minor eruption sometime overnight.
3654 13 Sep 2016 @ 0642 --- JimS Quiet. Had a major eruption sometime overnight.
3649 12 Sep 2016 @ 0649 --- JimS Quiet. Had a major eruption sometime overnight.
3642 11 Sep 2016 @ 0636 --- JimS Sloshing. Had a minor eruption sometime overnight.
3591 02 Sep 2016 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
3583 01 Sep 2016 @ 0610 --- JimS Quiet. Had a major eruption sometime overnight.
3587 31 Aug 2016 @ 2337 --- JarnoO Might've erupted. If so, then it was a major (see note by JimS @ 0610).
3573 30 Aug 2016 @ 0612 --- JimS Sloshing. Had a minor eruption sometime overnight.
3568 29 Aug 2016 @ 0607 --- JimS Quiet. Had a major eruption sometime overnight.
3570 29 Aug 2016 @ 0015 --- JarnoO Might've erupted. If so, then it was a major (see note that was submitted @ 0607)
3559 28 Aug 2016 @ 0611 --- JimS Quiet. Had a major eruption sometime overnight.
3553 27 Aug 2016 @ 0607 --- JimS Quiet. Had a major eruption sometime overnight.
3543 26 Aug 2016 @ 0624 --- JimS Quiet. Had a major eruption sometime overnight.
3486 13 Aug 2016 @ 0544 --- JimS Sloshing. Had a minor eruption sometime overnight.
3444 08 Aug 2016 @ 0547 --- JimS Quiet. Had a major eruption overnight. Might have been the eruption reported late last evening.
3431 06 Aug 2016 @ 0534 --- JimS Sloshing. Had a minor eruption sometime overnight.
3382 28 Jul 2016 @ 0534 --- JimS Sloshing. Had a minor eruption overnight.
3162 01 Jul 2016 @ 0513 --- JimS Quiet. Had a major eruption sometime overnight.
3086 18 Jun 2016 @ 0515 --- JimS Still no major.
3076 16 Jun 2016 @ 0512 --- JimS Quiet. Had a major eruption sometime overnight.
3063 14 Jun 2016 @ 0505 --- JimS Quiet. Had major eruption sometime overnight.
3056 12 Jun 2016 @ 0505 12 Jun 2016 @ 0534 JimS Sloshing. Had a minor eruption early this morning.
3044 11 Jun 2016 @ 0504 --- JimS Quiet. Had a major eruption sometime overnight.
2999 07 Jun 2016 @ 0453 --- JimS Still sloshing. No major yet.
2988 06 Jun 2016 @ 0509 --- JimS Quiet. Had a major eruption sometime overnight.
2943 02 Jun 2016 @ 0510 --- JimS Sloshing. Most recent eruption was a minor.
2923 31 May 2016 @ 0510 --- JimS Quiet. Had a major eruption sometime overnight.
2904 28 May 2016 @ 0507 --- JimS Major eruption steam phase ie at 0507, ended by the time I arrived at Castle at 0522.
2903 28 May 2016 @ 0438 --- Betty seems to be in steam phase
2899 27 May 2016 @ 0510 27 May 2016 @ 0615 JimS Quiet. Most recent eruption was a major.
2880 22 May 2016 @ 0512 --- JimS Quiet. Had a major eruption overnight.
2816 07 May 2016 @ 0526 --- Betty Castle seemed to be in steam phase when I logged on
EntrySourceLinkComment
10 Aug 2018 @ 1427 JSJ https://www.flickr.com/photos/jsjgeology/46465868542 Photo (1 of 3) of Castle Geyser's 2:27 PM-onward eruption on 10 August 2018, as seen from boardwalk near Liberty Pool.
28 Jan 2017 @ 1039 JSJ https://www.youtube.com/watch?v=eSORnt-mHN0 Video of Castle Geyser erupting (water phase) on 28 January 2017.
11 Aug 2016 @ 1358 JSJ https://www.flickr.com/photos/jsjgeology/30476239182 Thermal image (1 of 4) of Castle Geyser's 1:58 PM-onward eruption on 11 August 2016.
11 Aug 2016 @ 1358 JSJ https://www.flickr.com/photos/jsjgeology/29959320393 Photo (1 of 7) of Castle Geyser's 1:58 PM-onward eruption on 11 August 2016.
03 Jun 2016 @ 1748 JSJ https://www.flickr.com/photos/jsjgeology/29096074105 Photo (1 of 3) of Castle Geyser's 5:48 PM-onward eruption on 3 June 2016.
03 Jul 2013 @ 0711 JSJ https://www.youtube.com/watch?v=dlT_ulj6fmI Video by Micah Kipple of the 3 July 2013 morning major eruption (steam phase) of Castle Geyser.
03 Jul 2013 @ 0711 JSJ https://www.youtube.com/watch?v=UVClJ3jb52M Video by Micah Kipple of the 3 July 2013 morning major eruption (water phase) of Castle Geyser.
15 Aug 2015 @ 0957 JSJ https://www.youtube.com/watch?v=fP59M_A8la8#t=6m57s See clips # 18-31 (time stamp - 6:57) of this video compilation.
14 Aug 2015 @ 1530 JSJ https://www.youtube.com/watch?v=fP59M_A8la8#t=4m09s See clips # 11-17 (time stamps - 4:09 to 6:57) of this video compilation.
09 Aug 2015 @ 1544 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 6-10 of this video compilation.
16 Aug 2014 @ 1234 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 3-5 of this video compilation.
06 Jul 2015 @ 1256 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 1-2 of this video compilation.
28 Sep 2015 @ 0542 td http://i61.tinypic.com/2hdwbqf.jpg Castle 5:47
08 Sep 2014 @ 1201 Micah Kipple https://www.flickr.com/photos/sgplewka/15582865600 flickr
24 Sep 2014 @ 1338 Micah Kipple https://www.flickr.com/photos/126760153@N03/15642309900 flickr
17 Oct 2014 @ 1224 Micah Kipple https://www.flickr.com/photos/57621754@N08/15785065928 flickr
28 Sep 2014 @ 1458 Micah Kipple https://www.flickr.com/photos/castle_bravo/15661819608 flickr
26 Sep 2012 @ 1234 Micah Kipple https://www.flickr.com/photos/npsaficionado/15830592629 flickr
29 Aug 2011 @ 1444 Micah Kipple https://www.flickr.com/photos/128570456@N08/15922246028 flickr
16 Sep 2007 @ 1841 Micah Kipple https://www.flickr.com/photos/130216833@N06/16100193606 flickr
BaselineDistance (ft)Description
Bike Path 200On the side of the bike path south of the geyser.


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