Last Known Eruption
14h 59m ago
Predicted Next Eruption
Today at 2123 ± 45 minutes

Latest Eruptions

Eruption DurationInterval
20 Sep 2019 @ 0638 maj15m 12h 4m
19 Sep 2019 @ 1834 min4m 25s 14h 51m
19 Sep 2019 @ 0343 E maj4h 53m
18 Sep 2019 @ 2250 E min14h 42m
18 Sep 2019 @ 0808 ns maj1d 20m
17 Sep 2019 @ 0748 maj12h 59m
16 Sep 2019 @ 1849 min5m 14h 5m
16 Sep 2019 @ 0443:4314h 0m
15 Sep 2019 @ 1443 ie wc maj13h 47m
15 Sep 2019 @ 0056 ie wc maj14h 16m
14 Sep 2019 @ 1040 maj14h 13m
13 Sep 2019 @ 2027 maj15m 39s 15h 22m
13 Sep 2019 @ 0505 E maj4h 44m
13 Sep 2019 @ 0021 E min14h 56m
12 Sep 2019 @ 0925 maj4h 28m
12 Sep 2019 @ 0457 E min14h 52m
11 Sep 2019 @ 1405 ie maj6h 20m
11 Sep 2019 @ 0745 min13h 44m
10 Sep 2019 @ 1801 maj15h 2m
10 Sep 2019 @ 0259 E maj8h 41m
09 Sep 2019 @ 1818 wc min13h 40m
09 Sep 2019 @ 0438 E maj14h 18m
08 Sep 2019 @ 1420 E maj15h 4m
07 Sep 2019 @ 23164h 13m
07 Sep 2019 @ 1903 min3m 15h 10m
07 Sep 2019 @ 0353 E maj12h 20m
06 Sep 2019 @ 1533 min5h 20m
06 Sep 2019 @ 1013 min13h 40m
05 Sep 2019 @ 2033 wc maj14h 10m
05 Sep 2019 @ 0623 maj13h 53m
04 Sep 2019 @ 1630 maj14h 44m
04 Sep 2019 @ 0146 E maj6h 23m
03 Sep 2019 @ 1923 min6m 14h 34m
03 Sep 2019 @ 0449 E maj4h 51m
02 Sep 2019 @ 2358 E min14h 44m
02 Sep 2019 @ 0914 ns maj4h 56m
02 Sep 2019 @ 0418 E min13h 57m
01 Sep 2019 @ 1421 maj14h 57m
31 Aug 2019 @ 2324 ie wc maj4h 3m
31 Aug 2019 @ 1921 wc min14h 48m
31 Aug 2019 @ 0433 ns maj8h 15m
30 Aug 2019 @ 2018 min7m 37s 13h 32m
30 Aug 2019 @ 0646 ie maj13h 49m
29 Aug 2019 @ 1657 maj15h 3m
29 Aug 2019 @ 0154 ie wc maj6h 50m
28 Aug 2019 @ 1904 min7m 13h 11m
28 Aug 2019 @ 0553 E maj15h 12m
27 Aug 2019 @ 1441 ie wc maj7h 46m
27 Aug 2019 @ 0655 E min13h 29m
26 Aug 2019 @ 1726 maj13h 47m
26 Aug 2019 @ 0339 E maj15h 29m
25 Aug 2019 @ 1210 maj9h 47m
25 Aug 2019 @ 0223 E maj13h 47m
24 Aug 2019 @ 1236 maj14h 23m
23 Aug 2019 @ 2213 ie wc maj10h 12m
23 Aug 2019 @ 1201 min13h 48m
22 Aug 2019 @ 2213 maj15m 53s 14h 7m
22 Aug 2019 @ 0806 maj15m 28s 13h 40m
21 Aug 2019 @ 1826 wc maj13h 39m
21 Aug 2019 @ 0447 ie wc maj15h 9m
20 Aug 2019 @ 1338 E maj7h 18m
20 Aug 2019 @ 0620 E min4h 29m
20 Aug 2019 @ 0151 ie wc min13h 26m
19 Aug 2019 @ 1225 maj14h 32m
18 Aug 2019 @ 2153 E maj3h 51m
18 Aug 2019 @ 1802 min13h 4m
18 Aug 2019 @ 0458 ie wc maj14h 17m
17 Aug 2019 @ 1441 wc maj13h 36m
17 Aug 2019 @ 0105 wc maj14h 42m
16 Aug 2019 @ 1023 ns11h 37m
15 Aug 2019 @ 2246 ie wc min5h 20m
15 Aug 2019 @ 1726 wc min13h 26m
15 Aug 2019 @ 0400 ie wc maj14h 7m
14 Aug 2019 @ 1353 maj13h 40m
14 Aug 2019 @ 0013 E13h 52m
13 Aug 2019 @ 1021 wc maj13h 50m
12 Aug 2019 @ 2031 wc maj13h 49m
12 Aug 2019 @ 0642 ie wc maj13h 50m
11 Aug 2019 @ 1652 wc maj13h 35m
11 Aug 2019 @ 0317 ie wc maj14h 45m
10 Aug 2019 @ 1232 maj8h 57m
10 Aug 2019 @ 0335 E min12h 2m
09 Aug 2019 @ 1533 maj13h 31m
09 Aug 2019 @ 0202 wc maj13h 49m
08 Aug 2019 @ 1213 wc maj14h 0m
07 Aug 2019 @ 2213 wc maj4h 42m
07 Aug 2019 @ 1731 ie wc min13h 5m
07 Aug 2019 @ 0426 ie wc maj13h 29m
06 Aug 2019 @ 1457 maj13h 24m
06 Aug 2019 @ 0133 ie wc maj15h 37m
05 Aug 2019 @ 0956 maj6h 23m
05 Aug 2019 @ 0333 E min3h 24m
05 Aug 2019 @ 0009 E min14h 42m
04 Aug 2019 @ 0926:359h 22m
04 Aug 2019 @ 0004 E min13h 39m
03 Aug 2019 @ 1025 ns14h 33m
02 Aug 2019 @ 1952 maj6h 42m
02 Aug 2019 @ 1310 min1d 3h 22m
01 Aug 2019 @ 0948 maj13h 44m
31 Jul 2019 @ 2004 maj14m 4s 13h 58m

Interval Statistics

Interval Count100
Min3h 24m
Max1d 3h 22m
Mean12h 14m
Median13h 44m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13673 13 Sep 2019 @ 0530 --- B**2 From Beehive, sounded like steam phase of eruption. Perhaps major after minor? Anxiously waiting for electronic. With last moonlight looks like eruption.
12788 24 Jul 2019 @ 1449 --- cwonder Sporadic heavy splashing with occasional 5-20' bursts
11612 07 Jun 2019 @ 0848 --- B**2 Very quiet. Probably an overnight major. Was quiet when I passed by about 07:00 too.
11438 31 May 2019 @ 0713 --- B**2 Castle quiet - probable overnight major.
11283 21 May 2019 @ 1130 --- AngelaT Observed erratic, ongoing eruptions up to 2 m high past 1 hour.
11373 21 May 2019 @ 1045 --- Ben VL Sloppy. Minored overnight.
11127 29 Apr 2019 @ 1023 --- Polly Appears to have had a major 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.
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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