Last Known Eruption
16d 20h 39m ago

Latest Eruptions

Eruption DurationInterval
13 Nov 2020 @ 0700 wc maj15h 42m
12 Nov 2020 @ 1518 ie wc maj8h 46m
12 Nov 2020 @ 0632 wc min14h 31m
11 Nov 2020 @ 1601 ie wc maj18h 27m
10 Nov 2020 @ 2134 ie wc maj20h 6m
10 Nov 2020 @ 0128 wc maj9h 59m
09 Nov 2020 @ 1529 wc min6m 0s 18h 50m
08 Nov 2020 @ 2039 ie wc maj15h 19m
08 Nov 2020 @ 0520 ie wc maj15h 7m
07 Nov 2020 @ 1413 ie wc maj14h 9m
07 Nov 2020 @ 0004 ie wc maj13h 55m
06 Nov 2020 @ 1009 ie wc maj13h 15m
05 Nov 2020 @ 2054 ie wc maj15h 34m
05 Nov 2020 @ 0520 wc maj14h 7m
04 Nov 2020 @ 1513 wc maj14h 22m
04 Nov 2020 @ 0051 wc maj15h 20m
03 Nov 2020 @ 0931 ie wc maj21h 10m
02 Nov 2020 @ 1221 wc maj10h 14m
02 Nov 2020 @ 0207 wc maj14h 0m
01 Nov 2020 @ 1207 wc maj14h 19m
31 Oct 2020 @ 2248 maj14h 22m
31 Oct 2020 @ 0826 wc maj14h 30m
30 Oct 2020 @ 1756 wc maj14h 13m
30 Oct 2020 @ 0343 E maj14h 36m
29 Oct 2020 @ 1307 maj15h 4m
28 Oct 2020 @ 2203 wc maj3h 50m
28 Oct 2020 @ 1813 wc min3m 0s 15h 33m
28 Oct 2020 @ 0240 E maj16h 40m
27 Oct 2020 @ 1000 ie min14h 47m
26 Oct 2020 @ 1913 wc maj8h 29m
26 Oct 2020 @ 1044 ie min15h 44m
25 Oct 2020 @ 1900 E maj7h 10m
25 Oct 2020 @ 1150 E min5h 44m
25 Oct 2020 @ 0606 E min13h 56m
24 Oct 2020 @ 1610 ie maj15h 23m
24 Oct 2020 @ 0047 E maj5h 13m
23 Oct 2020 @ 1934 E min14h 32m
23 Oct 2020 @ 0502 E maj3h 55m
23 Oct 2020 @ 0107 E min14h 2m
22 Oct 2020 @ 1105 ie wc maj14h 39m
21 Oct 2020 @ 2026 E maj14h 4m
21 Oct 2020 @ 0622 ns wc maj14h 15m
20 Oct 2020 @ 1607 maj14h 13m
20 Oct 2020 @ 0154 E maj14h 10m
19 Oct 2020 @ 1144 maj~15m 45s 14h 10m
18 Oct 2020 @ 2134 E maj15h 12m
18 Oct 2020 @ 0622 wc maj7h 15m
17 Oct 2020 @ 2307 E min14h 24m
17 Oct 2020 @ 0843 maj~17m 14h 28m
16 Oct 2020 @ 1815 maj14h 20m
16 Oct 2020 @ 0355 E maj14h 35m
15 Oct 2020 @ 1320 E maj14h 25m
14 Oct 2020 @ 2255 E maj14h 18m
14 Oct 2020 @ 0837 ie wc maj14h 39m
13 Oct 2020 @ 1758 maj14h 17m
13 Oct 2020 @ 0341 E maj14h 34m
12 Oct 2020 @ 1307 maj13h 49m
11 Oct 2020 @ 2318 E14h 51m
11 Oct 2020 @ 0827 maj14h 24m
10 Oct 2020 @ 1803 ie wc maj13h 44m
10 Oct 2020 @ 0419 wc maj15h 20m
09 Oct 2020 @ 1259 ns maj7h 5m
09 Oct 2020 @ 0554 E min15h 26m
08 Oct 2020 @ 1428 ie maj7h 7m
08 Oct 2020 @ 0721 E min3h 14m
08 Oct 2020 @ 0407 E min14h 47m
07 Oct 2020 @ 1320 ie wc maj9h 12m
07 Oct 2020 @ 0408 wc min15h 7m
06 Oct 2020 @ 1301 maj24m 4h 43m
06 Oct 2020 @ 0818 min~3m 13h 46m
05 Oct 2020 @ 1832 ie maj28m 14h 25m
05 Oct 2020 @ 0407 wc maj15h 7m
04 Oct 2020 @ 1300 wc maj7h 50m
04 Oct 2020 @ 0510 wc min~7m 14h 45m
03 Oct 2020 @ 1425 ie wc maj4h 32m
03 Oct 2020 @ 0953 ie wc min>1m 20s 13h 52m
02 Oct 2020 @ 2001 maj15m 41s 14h 4m
02 Oct 2020 @ 0557 wc maj15h 10m
01 Oct 2020 @ 1447 maj5h 46m
01 Oct 2020 @ 0901 min~3m 13h 55m
30 Sep 2020 @ 1906 maj14h 34m
30 Sep 2020 @ 0432 maj14h 15m
29 Sep 2020 @ 1417 wc maj14h 45m
28 Sep 2020 @ 2332 wc maj3h 54m
28 Sep 2020 @ 1938 min~3m 14h 23m
28 Sep 2020 @ 0515 E maj10h 33m
27 Sep 2020 @ 1842 min14h 41m
27 Sep 2020 @ 0401 E maj5h 4m
26 Sep 2020 @ 2257 wc min13h 54m
26 Sep 2020 @ 0903 maj~14m 13h 56m
25 Sep 2020 @ 190714h 16m
25 Sep 2020 @ 0451 E maj13h 53m
24 Sep 2020 @ 1458 E maj14h 8m
24 Sep 2020 @ 0050 E maj13h 59m
23 Sep 2020 @ 1051 ie wc maj14h 3m
22 Sep 2020 @ 2048 wc maj14h 15m
22 Sep 2020 @ 0633 wc maj15h 0m
21 Sep 2020 @ 1533 E maj8h 55m
21 Sep 2020 @ 0638 min8m 14s 13h 51m
20 Sep 2020 @ 1647 maj13h 47m

Interval Statistics

Interval Count100
Min3h 14m
Max21h 10m
Mean13h 0m
Median14h 15m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16441 19 Oct 2020 @ 1057 --- am Lightly steaming. Last eruption was a major
16148 17 Sep 2020 @ 0645 --- William On a bike-by observation it looks to me like Castle had a major eruption overnight
15726 25 Aug 2020 @ 0813 --- am Castle spitting up water and showing signs it’s previous eruption was a minor.
14159 26 Mar 2020 @ 0704 --- CraigC Looks post-Major at 07:04
14110 02 Feb 2020 @ 1434 --- mhvogel The Bluetooth readout confirms it was a major.
13983 28 Oct 2019 @ 1537 --- mhvogel After reviewing the castle logger graph several times, castle had a minor. The duration of the eruption was 12 minutes. I lined up the start of the spike on the graph to the end of it. The spike on the graph is small compared to the rest of the previous eruptions.
13953 17 Oct 2019 @ 0930 17 Oct 2019 @ 0949 AngelaT Castle is erupting short bursts up to 1 meter, sporadically, indicative of a previous minor eruption.
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.
EntrySourceLinkComment
23 May 2017 @ 1746 JSJ https://www.youtube.com/watch?v=Xhs0ZWQEJ04 Half-minute video showing Castle Geyser's 5:46 PM-onward eruption on 23 May 2017.
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
BaselineDistance (ft)Description
Bike Path 200On the side of the bike path south of the geyser.