Last Known Eruption
110d 14h 44m ago

Latest Eruptions

Eruption DurationInterval
29 Apr 2019 @ 0610 E min12h 41m
28 Apr 2019 @ 1729 ns maj14h 47m
28 Apr 2019 @ 0242 E13h 52m
27 Apr 2019 @ 1250 ns maj4h 33m
27 Apr 2019 @ 0817 min6m 13h 10m
26 Apr 2019 @ 1907 ie maj13h 40m
26 Apr 2019 @ 0527 ns wc maj14h 51m
25 Apr 2019 @ 1436 ie wc maj5h 43m
25 Apr 2019 @ 0853 ns wc min13h 29m
24 Apr 2019 @ 1924 ns wc maj13h 58m
24 Apr 2019 @ 0526 ns wc maj13h 32m
23 Apr 2019 @ 1554 wc maj13h 58m
23 Apr 2019 @ 0156 wc maj16h 1m
22 Apr 2019 @ 0955 ie maj14h 28m
21 Apr 2019 @ 1927 E maj12h 47m
21 Apr 2019 @ 0640 wc maj13h 41m
20 Apr 2019 @ 1659 maj13h 54m
20 Apr 2019 @ 0305 wc maj13h 47m
19 Apr 2019 @ 1318 ns maj13h 49m
18 Apr 2019 @ 2329 wc maj14h 8m
18 Apr 2019 @ 0921 maj1d 3h 24m
17 Apr 2019 @ 0557 wc maj13h 45m
16 Apr 2019 @ 1612 ns wc maj14h 6m
16 Apr 2019 @ 0206 wc maj13h 35m
15 Apr 2019 @ 1231 ie wc maj1d 3h 9m
14 Apr 2019 @ 0922 ie wc maj15h 5m
13 Apr 2019 @ 1817 ie wc maj23h 46m
12 Apr 2019 @ 1831 ie wc maj1d 3h 28m
11 Apr 2019 @ 1503 ie wc2d 7h 17m
09 Apr 2019 @ 0746 wc maj13h 16m
08 Apr 2019 @ 1830 ns wc maj14h 42m
08 Apr 2019 @ 0348 ie wc maj5h 20m
07 Apr 2019 @ 2228 wc min14h 32m
07 Apr 2019 @ 0756 wc maj8h 14m
06 Apr 2019 @ 2342 wc min9h 14m
06 Apr 2019 @ 1428 wc min13h 18m
06 Apr 2019 @ 0110 wc maj13h 20m
05 Apr 2019 @ 1150 ns wc maj13h 12m
04 Apr 2019 @ 2238 wc maj13h 34m
04 Apr 2019 @ 0904 wc maj13h 42m
03 Apr 2019 @ 1922 wc maj13h 57m
03 Apr 2019 @ 0525 wc maj14h 8m
02 Apr 2019 @ 1517 wc maj4h 43m
02 Apr 2019 @ 1034 wc min12h 42m
01 Apr 2019 @ 2152 wc maj14h 29m
01 Apr 2019 @ 0723 wc maj14h 12m
31 Mar 2019 @ 1711 wc maj15h 16m
31 Mar 2019 @ 0155 wc maj14h 0m
30 Mar 2019 @ 1155 wc min13h 57m
29 Mar 2019 @ 2158 wc maj13h 37m
29 Mar 2019 @ 0821 ie wc maj14h 10m
28 Mar 2019 @ 1811 ns wc maj13h 51m
28 Mar 2019 @ 0420 wc maj13h 37m
27 Mar 2019 @ 1443 wc maj13h 35m
27 Mar 2019 @ 0108 wc maj18h 17m
26 Mar 2019 @ 0651 wc min13h 38m
25 Mar 2019 @ 1713 ns wc maj13h 43m
25 Mar 2019 @ 0330 wc maj13h 41m
24 Mar 2019 @ 1349 wc maj14h 14m
23 Mar 2019 @ 2335 wc maj16h 11m
23 Mar 2019 @ 0724 wc maj13h 40m
22 Mar 2019 @ 1744 ie wc maj13h 34m
22 Mar 2019 @ 0410 wc maj13h 49m
21 Mar 2019 @ 1421 wc maj14h 46m
20 Mar 2019 @ 2335 wc maj6h 6m
20 Mar 2019 @ 1729 ie wc min14h 15m
20 Mar 2019 @ 0314 wc maj6h 29m
19 Mar 2019 @ 2045 wc min13h 34m
19 Mar 2019 @ 0711 wc maj13h 47m
18 Mar 2019 @ 1724 ns wc maj13h 43m
18 Mar 2019 @ 0341 wc maj20h 35m
17 Mar 2019 @ 0706 wc maj14h 2m
16 Mar 2019 @ 1704 ie wc maj15h 53m
16 Mar 2019 @ 0111 ie wc maj16h 31m
15 Mar 2019 @ 0840 ie wc min14h 0m
14 Mar 2019 @ 1840 wc maj14h 9m
14 Mar 2019 @ 0431 ie wc maj14h 40m
13 Mar 2019 @ 1351 wc maj14h 3m
12 Mar 2019 @ 2348 wc maj13h 52m
12 Mar 2019 @ 0956 ns wc maj14h 52m
11 Mar 2019 @ 1904 wc maj7h 2m
11 Mar 2019 @ 1202 wc min13h 51m
10 Mar 2019 @ 2211 wc maj15h 43m
10 Mar 2019 @ 0628 wc maj5h 51m
09 Mar 2019 @ 2337 wc min5h 1m
09 Mar 2019 @ 1836 wc min13h 25m
09 Mar 2019 @ 0511 wc maj13h 42m
08 Mar 2019 @ 1529 ie wc maj13h 44m
08 Mar 2019 @ 0145 wc maj13h 50m
07 Mar 2019 @ 1155 wc maj13h 58m
06 Mar 2019 @ 2157 ie wc maj13h 44m
06 Mar 2019 @ 0813 wc maj14h 51m
05 Mar 2019 @ 1722 ie wc maj11h 33m
05 Mar 2019 @ 0549 ns wc maj12h 36m
04 Mar 2019 @ 1713 wc7h 57m
04 Mar 2019 @ 0916 ie wc maj14h 46m
03 Mar 2019 @ 1830 wc13h 43m
03 Mar 2019 @ 0447 wc maj13h 36m
02 Mar 2019 @ 1511 wc maj13h 47m
02 Mar 2019 @ 0124 ie maj13h 51m

Interval Statistics

Interval Count100
Min4h 33m
Max2d 7h 17m
Mean14h 5m
Median13h 49m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
11118 29 Apr 2019 @ 1023 --- Polly Castle appears to have had a major sometime this morning.
11093 27 Apr 2019 @ 0751 --- Micah Kipple Splashy play. May have minored overnight
11045 22 Apr 2019 @ 1057 --- mhvogel A volunteer observed castle having a major. He saw it transition from water to heavy steam phase.
10953 03 Mar 2019 @ 0845 03 Mar 2019 @ 1045 AngelaT A lot of splashing activity observed. Did it have a minor this morning?
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.
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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