Last Known Eruption
1h 45m ago
Predicted Next Eruption
Today at 1436 ± 45 minutes

Latest Eruptions

EruptionDurationInterval
24 Sep 2017 @ 0051 wc maj14h 46m
23 Sep 2017 @ 1005 maj20h 18m
22 Sep 2017 @ 1347 wc maj13h 26m
22 Sep 2017 @ 0021 E maj13h 11m
21 Sep 2017 @ 1110 maj13h 38m
20 Sep 2017 @ 2132 wc maj13h 39m
20 Sep 2017 @ 0753 ie maj13h 44m
19 Sep 2017 @ 1809 wc maj13h 29m
19 Sep 2017 @ 0440 wc maj13h 42m
18 Sep 2017 @ 1458 maj13h 36m
18 Sep 2017 @ 0122 wc maj15h 0m
17 Sep 2017 @ 1022 maj9h 11m
17 Sep 2017 @ 0111 wc min13h 38m
16 Sep 2017 @ 1133 maj13h 47m
15 Sep 2017 @ 2146 wc maj13h 40m
15 Sep 2017 @ 0806 maj13h 46m
14 Sep 2017 @ 1820 wc maj13h 32m
14 Sep 2017 @ 0448 wc maj13h 29m
13 Sep 2017 @ 1519 maj13h 45m
13 Sep 2017 @ 0134 wc maj13h 50m
12 Sep 2017 @ 1144 maj13h 32m
11 Sep 2017 @ 2212 wc maj14h 20m
11 Sep 2017 @ 0752 maj3h 59m
11 Sep 2017 @ 0353 wc min13h 32m
10 Sep 2017 @ 1421 maj13h 46m
10 Sep 2017 @ 0035 wc maj13h 45m
09 Sep 2017 @ 1050 maj13h 46m
08 Sep 2017 @ 2104 wc maj13h 39m
08 Sep 2017 @ 0725 maj14h 30m
07 Sep 2017 @ 1655 maj4h 16m
07 Sep 2017 @ 1239 min13h 50m
06 Sep 2017 @ 2249 wc maj6h 41m
06 Sep 2017 @ 1608 min3m 13h 2m
06 Sep 2017 @ 0306 maj13h 47m
05 Sep 2017 @ 1319 maj14h 4m
04 Sep 2017 @ 2315 wc maj13h 40m
04 Sep 2017 @ 0935 maj14h 57m
03 Sep 2017 @ 1838 maj5h 56m
03 Sep 2017 @ 1242 min4m 5h 0m
03 Sep 2017 @ 0742 E min13h 23m
02 Sep 2017 @ 1819 maj13h 19m
02 Sep 2017 @ 0500 E maj13h 31m
01 Sep 2017 @ 1529 maj13h 25m
01 Sep 2017 @ 0204 wc maj13h 44m
31 Aug 2017 @ 1220 maj14h 22m
30 Aug 2017 @ 2158 wc maj9h 46m
30 Aug 2017 @ 1212 wc min~5m 4h 48m
30 Aug 2017 @ 0724 min13h 56m
29 Aug 2017 @ 1728 maj4h 56m
29 Aug 2017 @ 1232 ie min13h 20m
28 Aug 2017 @ 2312 wc maj13h 24m
28 Aug 2017 @ 0948 maj13h 41m
27 Aug 2017 @ 2007 maj13h 35m
27 Aug 2017 @ 0632 maj14h 51m
26 Aug 2017 @ 1541 maj8h 9m
26 Aug 2017 @ 0732 E min13h 58m
25 Aug 2017 @ 1734 wc maj13h 32m
25 Aug 2017 @ 0402 wc maj13h 35m
24 Aug 2017 @ 142713h 20m
24 Aug 2017 @ 0107 wc maj14h 43m
23 Aug 2017 @ 1024 maj18h 12m
22 Aug 2017 @ 1612 maj13h 32m
22 Aug 2017 @ 0240 wc maj13h 41m
21 Aug 2017 @ 1259 wc maj13h 29m
20 Aug 2017 @ 2330 ns wc maj13h 47m
20 Aug 2017 @ 0943 maj16m 33s 13h 28m
19 Aug 2017 @ 2015 maj14h 25m
19 Aug 2017 @ 0550 maj5h 22m
19 Aug 2017 @ 0027 min3m 30s 13h 44m
18 Aug 2017 @ 1043 maj13h 49m
17 Aug 2017 @ 2054 wc maj14h 35m
17 Aug 2017 @ 0619 maj5h 18m
17 Aug 2017 @ 0101 E min13h 37m
16 Aug 2017 @ 1124 maj13h 47m
15 Aug 2017 @ 2137 wc maj13h 32m
15 Aug 2017 @ 0805 maj13h 23m
14 Aug 2017 @ 1842 maj14h 24m
14 Aug 2017 @ 0418 ? wc maj9h 43m
13 Aug 2017 @ 1835 wc min13h 20m
13 Aug 2017 @ 0515 wc maj13h 12m
12 Aug 2017 @ 1603 maj13h 23m
12 Aug 2017 @ 0240 wc maj13h 32m
11 Aug 2017 @ 1308 wc maj13h 29m
10 Aug 2017 @ 2339 wc maj13h 21m
10 Aug 2017 @ 1018 maj14h 35m
09 Aug 2017 @ 1943 ie wc maj7h 47m
09 Aug 2017 @ 1156 min13h 2m
08 Aug 2017 @ 2254 wc maj13h 14m
08 Aug 2017 @ 0940 maj13h 21m
07 Aug 2017 @ 2019 wc maj13h 12m
07 Aug 2017 @ 0707 maj13h 16m
06 Aug 2017 @ 1751 maj13h 21m
06 Aug 2017 @ 0430 E maj13h 32m
05 Aug 2017 @ 1458 maj13h 11m
05 Aug 2017 @ 0147 wc maj15h 9m
04 Aug 2017 @ 1038 maj20h 50m
03 Aug 2017 @ 1348 ie maj11h 34m
03 Aug 2017 @ 0214 wc min4h 13m
02 Aug 2017 @ 2201 wc min14h 6m
02 Aug 2017 @ 0755 maj6h 31m

Interval Statistics

Interval Count100
Min3h 59m
Max20h 50m
Mean12h 42m
Median13h 32m

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
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 --- AndrewW 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 --- AndrewW Sloshing, castle minored overnight
4532 25 Jul 2017 @ 0755 --- AndrewW 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.
2881 22 May 2016 @ 0534 --- DaveM I'm glad JimS was able to confirm that it was a major eruption that was seen on the webcam last night.
2880 22 May 2016 @ 0512 --- JimS Quiet. Had a major eruption overnight.
2879 22 May 2016 @ 0339 --- DaveM Castle had a major overnight as seen on the webcam.
2878 22 May 2016 @ 0323 --- DaveM Looks like castle started
2816 07 May 2016 @ 0526 --- Betty Castle seemed to be in steam phase when I logged on
2721 08 Apr 2016 @ 0615 --- Betty in Steam phase as I got on 0600
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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