Last Known Eruption
15h 34m ago

Latest Eruptions

Eruption DurationInterval
20 Jun 2021 @ 2103 maj19h 11m
20 Jun 2021 @ 0152 wc maj21h 22m
19 Jun 2021 @ 0430 ie wc maj5h 32m
18 Jun 2021 @ 2258 ie wc min21h 49m
18 Jun 2021 @ 0109 wc maj12h 51m
17 Jun 2021 @ 1218 min~3m 20h 53m
16 Jun 2021 @ 1525 maj9h 43m
16 Jun 2021 @ 0542 min~6m 17h 0m
15 Jun 2021 @ 1241:32 wc maj13h 0m
14 Jun 2021 @ 2341 ie wc maj15h 24m
14 Jun 2021 @ 0817 wc maj5h 59m
14 Jun 2021 @ 0218 ie wc min7h 56m
13 Jun 2021 @ 1822 min9m 12h 55m
13 Jun 2021 @ 0527 maj13h 41m
12 Jun 2021 @ 1546 maj13h 34m
12 Jun 2021 @ 0212 ie wc maj13h 26m
11 Jun 2021 @ 1246 maj13h 29m
10 Jun 2021 @ 2317 E13h 42m
10 Jun 2021 @ 0935 maj13h 46m
09 Jun 2021 @ 1949 maj13h 28m
09 Jun 2021 @ 0621 maj13h 50m
08 Jun 2021 @ 1630:53 wc maj13h 22m
08 Jun 2021 @ 0308 wc maj13h 50m
07 Jun 2021 @ 1318 maj13h 13m
07 Jun 2021 @ 0005 wc maj14h 47m
06 Jun 2021 @ 0918 maj4h 9m
06 Jun 2021 @ 0509 wc min13h 48m
05 Jun 2021 @ 1521 maj13h 21m
05 Jun 2021 @ 0200 ie wc maj15h 49m
04 Jun 2021 @ 1011 maj1d 2h 12m
03 Jun 2021 @ 0759 wc min15h 5m
02 Jun 2021 @ 1654 ns wc maj6h 45m
02 Jun 2021 @ 1009 min13h 42m
01 Jun 2021 @ 2027 maj13h 55m
01 Jun 2021 @ 0632 maj15h 4m
31 May 2021 @ 1528 wc maj9h 14m
31 May 2021 @ 0614 min14h 22m
30 May 2021 @ 1552 ns maj6h 15m
30 May 2021 @ 0937 min13h 34m
29 May 2021 @ 2003 wc maj13h 35m
29 May 2021 @ 0628 maj15h 26m
28 May 2021 @ 1502 maj7h 54m
28 May 2021 @ 0708 ns min13h 23m
27 May 2021 @ 1745 wc maj13h 52m
27 May 2021 @ 0353 ie wc maj14h 1m
26 May 2021 @ 1352 ie maj14h 6m
25 May 2021 @ 2346 wc maj13h 51m
25 May 2021 @ 0955 maj14h 21m
24 May 2021 @ 1934 maj15h 43m
24 May 2021 @ 0351 E maj12h 59m
23 May 2021 @ 1452 ie wc min9h 3m
23 May 2021 @ 0548:58 min10m 16s 13h 19m
22 May 2021 @ 1629 ns wc maj13h 40m
22 May 2021 @ 0249 wc maj13h 45m
21 May 2021 @ 1304 E maj13h 34m
20 May 2021 @ 2330 ie wc maj13h 48m
20 May 2021 @ 0942 maj13h 57m
19 May 2021 @ 1945 maj13h 40m
19 May 2021 @ 0605 wc maj13h 52m
18 May 2021 @ 1613 maj13h 43m
18 May 2021 @ 0230 wc maj14h 0m
17 May 2021 @ 1230 maj13h 32m
16 May 2021 @ 2258 E maj13h 58m
16 May 2021 @ 0900 maj13h 42m
15 May 2021 @ 1918 maj14h 10m
15 May 2021 @ 0508 ie wc maj14h 43m
14 May 2021 @ 1425 maj4h 27m
14 May 2021 @ 0958 min13h 57m
13 May 2021 @ 2001 maj15h 1m
13 May 2021 @ 0500 wc maj8h 21m
12 May 2021 @ 2039 min13h 45m
12 May 2021 @ 0654 maj15h 3m
11 May 2021 @ 1551 maj4h 56m
11 May 2021 @ 1055 min14h 51m
10 May 2021 @ 2004 maj4h 37m
10 May 2021 @ 1527 min4m 9s 15h 19m
10 May 2021 @ 0008 wc maj11h 56m
09 May 2021 @ 1212 min5h 21m
09 May 2021 @ 0651 min13h 32m
08 May 2021 @ 1719 wc maj13h 45m
08 May 2021 @ 0334 wc maj14h 8m
07 May 2021 @ 1326 maj13h 31m
06 May 2021 @ 2355 wc maj14h 51m
06 May 2021 @ 0904 maj4h 34m
06 May 2021 @ 0430 wc min14h 29m
05 May 2021 @ 1401 ns wc maj3h 53m
05 May 2021 @ 1008 min14h 57m
04 May 2021 @ 1911 ie wc maj6h 56m
04 May 2021 @ 1215 E min15h 17m
03 May 2021 @ 2058 E maj11h 3m
03 May 2021 @ 0955 ns wc maj4h 15m
03 May 2021 @ 0540 wc min13h 58m
02 May 2021 @ 1542 ie wc maj14h 20m
02 May 2021 @ 0122 wc maj14h 4m
01 May 2021 @ 1118 wc maj14h 0m
30 Apr 2021 @ 2118 wc maj14h 18m
30 Apr 2021 @ 0700 wc maj14h 13m
29 Apr 2021 @ 1646:33 maj14h 12m
29 Apr 2021 @ 0234 wc maj16h 14m
28 Apr 2021 @ 1020 maj21h 44m

Interval Statistics

Interval Count100
Min3h 53m
Max1d 2h 12m
Mean13h 2m
Median13h 45m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
17842 16 Jun 2021 @ 0542 --- JimS May have also had a minor a few hours earlier since 17 hour interval is so large to this eruption.
17760 14 Jun 2021 @ 0541 --- JimS Sloshing. Overnight eruption was another minor.
17648 11 Jun 2021 @ 0557 --- JimS Quiet. Had a major eruption overnight.
17465 04 Jun 2021 @ 1130 --- steve Just an odd note, I looked at the temperature monitor for Castle and there were no other eruptions recorded between the 0759 eruption on the 3rd and the 1011 eruption today on the 4th. I’m not sure what to make of it. Really strong Wind out of the South? Or a 26+ hour interval? Odd...
17420 04 Jun 2021 @ 0612 --- JimS Still displaying post minor behavior.
17125 18 May 2021 @ 0630 --- JimS Quiet. Had a major eruption overnight. The 0230 eruption must have been a major.
17109 17 May 2021 @ 0716 --- JimS Quiet. Had a major eruption overnight.
16990 06 May 2021 @ 0757 --- JimS Castle is sloshing. Overnight eruption was apparently a minor.
16815 19 Jan 2021 @ 1431 --- mhvogel The graph barely picked up the eruption, if the small spike on the graph was an eruption. I think the graph is somehow wrong because I don't recall Castle having 12.5 hour intervals. I'll erase the entry when more data is available.
16810 16 Jan 2021 @ 1652 --- Graham Castle is a Major.
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.
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.