Last Known Eruption
145d 2h 52m ago

Latest Eruptions

Eruption DurationInterval
25 Mar 2018 @ 2216 wc maj13h 55m
25 Mar 2018 @ 0821 wc maj13h 49m
24 Mar 2018 @ 1832 wc maj14h 3m
24 Mar 2018 @ 0429 ie wc maj13h 55m
23 Mar 2018 @ 1434 wc maj1d 5h 8m
22 Mar 2018 @ 0926 wc maj4h 55m
22 Mar 2018 @ 0431 wc min~4m 13h 42m
21 Mar 2018 @ 1449 wc maj14h 34m
21 Mar 2018 @ 0015 wc maj4h 48m
20 Mar 2018 @ 1927 ie wc min14h 41m
20 Mar 2018 @ 0446 wc maj6h 12m
19 Mar 2018 @ 2234 wc min14h 36m
19 Mar 2018 @ 0758 ie wc maj11h 48m
18 Mar 2018 @ 2010 wc min5h 47m
18 Mar 2018 @ 1423 wc min~6m 13h 21m
18 Mar 2018 @ 0102 wc maj13h 52m
17 Mar 2018 @ 1110 wc maj13h 31m
16 Mar 2018 @ 2139 wc maj13h 33m
16 Mar 2018 @ 0806 ns wc maj13h 52m
15 Mar 2018 @ 1814 ns wc maj13h 49m
15 Mar 2018 @ 0425 wc maj13h 22m
14 Mar 2018 @ 1503 wc maj13h 44m
14 Mar 2018 @ 0119 wc maj13h 51m
13 Mar 2018 @ 1128 wc maj13h 29m
12 Mar 2018 @ 2159 wc maj13h 47m
12 Mar 2018 @ 0812 wc maj14h 5m
11 Mar 2018 @ 1807 ie wc maj13h 38m
11 Mar 2018 @ 0429 wc maj13h 44m
10 Mar 2018 @ 1345 ie wc maj13h 43m
10 Mar 2018 @ 0002 ie wc maj15h 0m
09 Mar 2018 @ 0902 wc maj7h 1m
09 Mar 2018 @ 0201 wc min~4m 4h 21m
08 Mar 2018 @ 2140 wc min~4m 13h 3m
08 Mar 2018 @ 0837 wc maj14h 40m
07 Mar 2018 @ 1757 ie wc maj4h 9m
07 Mar 2018 @ 1348 wc min~4m 15h 17m
06 Mar 2018 @ 2231 ie wc maj13h 30m
06 Mar 2018 @ 0901 wc min~4m 9h 34m
05 Mar 2018 @ 2327 wc min~3m 4h 49m
05 Mar 2018 @ 1838 wc min~7m 13h 46m
05 Mar 2018 @ 0452 wc maj14h 49m
04 Mar 2018 @ 1403 wc maj19h 12m
03 Mar 2018 @ 1851 wc maj13h 55m
03 Mar 2018 @ 0456 wc maj1d 3h 15m
02 Mar 2018 @ 0141 wc maj14h 49m
01 Mar 2018 @ 1052 ie wc17h 54m
28 Feb 2018 @ 1658 wc maj13h 53m
28 Feb 2018 @ 0305 wc maj13h 33m
27 Feb 2018 @ 1332 ie wc maj13h 45m
26 Feb 2018 @ 2347 wc maj1d 18h 21m
25 Feb 2018 @ 0526 wc maj7h 32m
24 Feb 2018 @ 2154 wc min1d 4h 20m
23 Feb 2018 @ 1734 ie wc maj19h 5m
22 Feb 2018 @ 2229 wc maj13h 28m
22 Feb 2018 @ 0901 ie wc maj14h 21m
21 Feb 2018 @ 1840 wc maj14h 47m
21 Feb 2018 @ 0353 wc maj6h 5m
20 Feb 2018 @ 2148 wc min13h 30m
20 Feb 2018 @ 0818 ie wc maj13h 40m
19 Feb 2018 @ 1838 wc maj13h 38m
19 Feb 2018 @ 0500 wc maj13h 21m
18 Feb 2018 @ 1539 maj13h 29m
18 Feb 2018 @ 0210 ? wc maj14h 24m
17 Feb 2018 @ 1146 wc maj7h 8m
17 Feb 2018 @ 0438 wc min14h 43m
16 Feb 2018 @ 1355 maj6h 0m
16 Feb 2018 @ 0755 wc min13h 5m
15 Feb 2018 @ 1850 wc maj13h 51m
15 Feb 2018 @ 0459 wc maj13h 32m
14 Feb 2018 @ 1527 ie wc maj13h 26m
14 Feb 2018 @ 0201 wc maj14h 42m
13 Feb 2018 @ 1119 wc maj19h 49m
12 Feb 2018 @ 1530 ie wc maj14h 30m
12 Feb 2018 @ 0100 wc maj4h 10m
11 Feb 2018 @ 2050 wc min13h 10m
11 Feb 2018 @ 0740 wc maj13h 38m
10 Feb 2018 @ 1802 ie wc maj13h 56m
10 Feb 2018 @ 0406 wc maj13h 21m
09 Feb 2018 @ 1445 wc maj13h 22m
09 Feb 2018 @ 0123 wc maj13h 48m
08 Feb 2018 @ 1135 wc maj13h 46m
07 Feb 2018 @ 2149 wc maj15h 31m
07 Feb 2018 @ 0618 wc maj14h 3m
06 Feb 2018 @ 1615 wc min13h 17m
06 Feb 2018 @ 0258 wc maj13h 22m
05 Feb 2018 @ 1336 ns wc maj1d 3h 23m
04 Feb 2018 @ 1013 wc maj13h 56m
03 Feb 2018 @ 2017 wc maj14h 10m
03 Feb 2018 @ 0607 wc maj14h 44m
02 Feb 2018 @ 1523 wc maj20h 6m
01 Feb 2018 @ 1917 wc min13h 17m
01 Feb 2018 @ 0600 wc maj13h 39m
31 Jan 2018 @ 1621 wc maj15h 11m
31 Jan 2018 @ 0110 wc maj14h 54m
30 Jan 2018 @ 1016 wc min13h 59m
29 Jan 2018 @ 2017 wc maj10h 54m
29 Jan 2018 @ 0923 min14h 55m
28 Jan 2018 @ 1828 wc maj8h 43m
28 Jan 2018 @ 0945 min14h 39m
27 Jan 2018 @ 1906 wc maj18h 51m

Interval Statistics

Interval Count100
Min4h 9m
Max1d 18h 21m
Mean13h 53m
Median13h 46m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
7958 11 Mar 2018 @ 0429 --- MikeG Looks like an eruption at 04:29. It's also very cold and steamy out.
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
4779 04 Aug 2017 @ 0616 --- JimS Sloshing. Had a minor eruption 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.
4113 22 May 2017 @ 0630 --- JimS Appears to have had a minor eruption sometime overnight.
4097 16 May 2017 @ 0541 --- JimS Sloshing. No major eruption yet.
4094 14 May 2017 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
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
3729 30 Sep 2016 @ 0756 --- Kitt B Castle was splashing around this morning, so it must have minor ed overnight
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.
3606 06 Sep 2016 @ 0630 --- JimS Quiet. Had a major 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 --- DGInc 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 --- DGInc 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.
3335 21 Jul 2016 @ 0557 --- JimS Quiet. Had a major eruption sometime overnight.
3299 13 Jul 2016 @ 0504 --- JimS In steam. A major.
3233 07 Jul 2016 @ 0506 --- JimS Quiet. Had a major eruption sometime overnight.
3235 07 Jul 2016 @ 0149 --- DGInc Was ie, probably a couple of minutes after the start
3221 06 Jul 2016 @ 0601 --- JimS Quiet. Had a major eruption sometime 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.
2955 03 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.
EntrySourceLinkComment
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
21 Sep 2012 @ 1842 Micah Kipple https://www.flickr.com/photos/129292470@N04/16127639365 flickr
BaselineDistance (ft)Description
Bike Path 200On the side of the bike path south of the geyser.


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