Last Known Eruption
11h 56m ago
Predicted Next Eruption
Today at 0700 ± 60 minutes

Latest Eruptions

Eruption DurationInterval
22 Nov 2024 @ 1430 wc maj1d 6h 41m
21 Nov 2024 @ 0749 ie wc maj1d 1h 18m
20 Nov 2024 @ 0631 wc maj17h 41m
19 Nov 2024 @ 1250 ie wc maj9h 25m
19 Nov 2024 @ 0325 wc min16h 55m
18 Nov 2024 @ 1030 ie wc7h 36m
18 Nov 2024 @ 0254 wc min16h 31m
17 Nov 2024 @ 1023 wc maj6h 47m
17 Nov 2024 @ 0336 wc min16h 5m
16 Nov 2024 @ 1131 wc maj16h 25m
15 Nov 2024 @ 1906 wc maj16h 18m
15 Nov 2024 @ 0248 wc maj16h 34m
14 Nov 2024 @ 1014 wc maj17h 9m
13 Nov 2024 @ 1705 ie wc maj10h 23m
13 Nov 2024 @ 0642 wc min15h 50m
12 Nov 2024 @ 1452 ie wc maj2d 2h 4m
10 Nov 2024 @ 1248 ie wc maj21h 53m
09 Nov 2024 @ 1455 wc maj8h 31m
09 Nov 2024 @ 0624 wc min17h 4m
08 Nov 2024 @ 1320 ns wc maj4h 15m
08 Nov 2024 @ 0905 wc min17h 28m
07 Nov 2024 @ 1537 wc maj7h 49m
07 Nov 2024 @ 0748 ie wc min16h 17m
06 Nov 2024 @ 1531 wc maj22h 16m
05 Nov 2024 @ 1715 wc min3d 6h 31m
02 Nov 2024 @ 1144 ie1d 1h 48m
01 Nov 2024 @ 0956 wc maj16h 23m
31 Oct 2024 @ 1733 ie wc maj1d 9h 40m
30 Oct 2024 @ 0753 ns wc maj22h 35m
29 Oct 2024 @ 0918 wc maj16h 49m
28 Oct 2024 @ 1629 wc maj4h 4m
28 Oct 2024 @ 1225 wc min4m 17h 0m
27 Oct 2024 @ 1925 wc maj6h 32m
27 Oct 2024 @ 1253 wc min1d 7h 23m
26 Oct 2024 @ 0530 ie wc maj17h 59m
25 Oct 2024 @ 1131 ns wc maj17h 17m
24 Oct 2024 @ 1814 wc maj1d 5h 14m
23 Oct 2024 @ 1300 ie wc maj11h 41m
23 Oct 2024 @ 0119 wc min7h 12m
22 Oct 2024 @ 1807 A min6:5015h 52m
22 Oct 2024 @ 0215 wc maj16h 30m
21 Oct 2024 @ 0945 ns maj19h 12m
20 Oct 2024 @ 1433 maj1d 10h 9m
19 Oct 2024 @ 0424 wc min16h 21m
18 Oct 2024 @ 1203 ns wc maj16h 34m
17 Oct 2024 @ 1929 wc maj18h 33m
17 Oct 2024 @ 0056 wc maj13h 15m
16 Oct 2024 @ 1141 ie min19h 19m
15 Oct 2024 @ 1622 maj17h 42m
14 Oct 2024 @ 2240 wc maj12h 23m
14 Oct 2024 @ 1017 min~5m 6h 37m
14 Oct 2024 @ 0340 wc min16h 9m
13 Oct 2024 @ 1131 maj16h 21m
12 Oct 2024 @ 1910 wc maj2d 9h 42m
10 Oct 2024 @ 0928 maj1d 2h 56m
09 Oct 2024 @ 0632 wc maj16h 22m
08 Oct 2024 @ 1410 maj1d 8h 6m
07 Oct 2024 @ 0604 ie wc maj16h 19m
06 Oct 2024 @ 1345 maj2d 2h 14m
04 Oct 2024 @ 1131 ns maj21h 21m
03 Oct 2024 @ 1410 ie maj1d 2h 1m
02 Oct 2024 @ 1209 maj17h 52m
01 Oct 2024 @ 1817 maj7h 46m
01 Oct 2024 @ 1031 min7m 17h 45m
30 Sep 2024 @ 1646 maj8h 24m
30 Sep 2024 @ 0822 min22h 19m
29 Sep 2024 @ 1003 maj20h 6m
28 Sep 2024 @ 1357 min17h 42m
27 Sep 2024 @ 2015 wc maj5h 59m
27 Sep 2024 @ 1416 min16h 7m
26 Sep 2024 @ 2209 ns wc maj17h 39m
26 Sep 2024 @ 0430 wc maj10h 20m
25 Sep 2024 @ 1810 min5m 2s 1d 3h 25m
24 Sep 2024 @ 1445 min16h 7m
23 Sep 2024 @ 2238 ns wc maj16h 19m
23 Sep 2024 @ 0619 wc maj16h 9m
22 Sep 2024 @ 1410 maj16h 0m
21 Sep 2024 @ 2210 wc maj17h 27m
21 Sep 2024 @ 0443 wc maj5h 1m
20 Sep 2024 @ 2342 wc min15h 54m
20 Sep 2024 @ 0748 maj17h 15m
19 Sep 2024 @ 1433 ie maj6h 39m
19 Sep 2024 @ 0754 min3m 15h 58m
18 Sep 2024 @ 1556 maj16h 19m
17 Sep 2024 @ 2337 wc maj16h 37m
17 Sep 2024 @ 0700 A maj3h 20m
17 Sep 2024 @ 0340 A min16h 30m
16 Sep 2024 @ 1110 wc maj5h 31m
16 Sep 2024 @ 05391516h 16m
15 Sep 2024 @ 1323 maj17h 3m
14 Sep 2024 @ 2020 A11h 35m
14 Sep 2024 @ 0845 min16h 22m
13 Sep 2024 @ 1623 maj1d 8h 38m
12 Sep 2024 @ 0745 maj16h 2m
11 Sep 2024 @ 1543 maj1d 7h 54m
10 Sep 2024 @ 0749 wc maj16h 16m
09 Sep 2024 @ 1533 maj15h 52m
08 Sep 2024 @ 2341 maj15h 38m
08 Sep 2024 @ 0803 ie maj16h 58m
07 Sep 2024 @ 1505 wc maj1d 8h 6m

Interval Statistics

Interval Count100
Min3h 20m
Max3d 6h 31m
Mean18h 33m
Median16h 30m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
37656 20 Oct 2024 @ 0915 --- aferrara heavy voluminous splashing, no eruption since minor yesterday morning
37572 14 Oct 2024 @ 0855 --- aferrara hardly steaming, voluminously splashing, probably a minor over night.
37519 11 Oct 2024 @ 0552 --- K.Cooper lightly huffing had a major overnight
37405 05 Oct 2024 @ 0755 --- Graham Major overnight
37239 29 Sep 2024 @ 0915 --- User34 Heavy sloshing, did not major overnight
36576 27 Aug 2024 @ 1932 --- MikeG (wc) Either had some large splashes or another minor eruption, I'm not sure which.
36376 12 Aug 2024 @ 0651 12 Aug 2024 @ 0705 JimS Boardwalk soaked, Castle steaming quietly. Had a major eruption overnight
36332 09 Aug 2024 @ 0718 --- JimS Sloshing. Had a minor eruption overnight
36308 07 Aug 2024 @ 0621 --- JimS Sloshing. Had a minor eruption
36306 06 Aug 2024 @ 1903 --- Dan A Had a minor sometime earlier
36239 03 Aug 2024 @ 0614 --- JimS steaming quietly, had a major eruption overnight
36192 01 Aug 2024 @ 0623 --- JimS Sloshing. was a minor
36186 31 Jul 2024 @ 0626 --- JimS Sloshing. Had a minor eruption overnight
36145 28 Jul 2024 @ 0620 --- JimS Steaming quietly. Had a major eruption overnight
36012 21 Jul 2024 @ 0600 --- JimS Sloshing. Still no major
35992 20 Jul 2024 @ 0631 --- JimS Sloshing. Has not yet had a major eruption
35866 13 Jul 2024 @ 0550 --- JimS Steaming quietly. Had a major eruption overnight
35830 11 Jul 2024 @ 0546 --- JimS Steaming quietly. Had a major eruption overnight
35795 09 Jul 2024 @ 0606 --- JimS Steaming quietly. Had a major eruption overnight
35772 08 Jul 2024 @ 0542 --- JimS Sloshing. Had a minor eruption overnight
35753 07 Jul 2024 @ 0609 --- JimS Still sloshing. No major yet
35723 05 Jul 2024 @ 0552 --- JimS Still sloshing. No major yet
35655 01 Jul 2024 @ 0550 --- JimS Steaming quietly. Had a major eruption overnight
35634 30 Jun 2024 @ 0928 --- Polly Castle is in steam phase
35624 30 Jun 2024 @ 0607 --- JimS Still sloshing. Has not yet had a major eruption.
35582 27 Jun 2024 @ 0610 --- JimS Steaming quietly. Had a major eruption overnight
35542 25 Jun 2024 @ 0610 --- JimS Has been steaming quietly. Had a major eruption overnight.
35133 12 Jun 2024 @ 0604 --- JimS Still sloshing. Has not had a major eruption yet.
35020 09 Jun 2024 @ 0259 --- Mikemcc post major steam phase
34951 07 Jun 2024 @ 0550 --- JimS Quiet. Had a major eruption overnight
34745 29 May 2024 @ 0804 --- Stephen_Gemar Sloshing. Likely had a minor overnight.
34484 09 May 2024 @ 0610 --- CraigC Castle looks to be in post-eruptive steam phase
34386 30 Apr 2024 @ 1803 --- MikeG ie, looks like it might quit at any moment. (But apparently it didn't)
34108 11 Mar 2024 @ 1728 --- K.Cooper Splashing, water is already back.
34040 16 Feb 2024 @ 0704 --- JarnoO (wc) Looked like it was in steam and would fit with NPS' 2345 prediction. Also implies a minor happened overnight. 0704 is the first time it was brought in view after the cam was parked on its overnight spot with Castle off-screen (sigh... with Castle in view there's still plenty of room for Beehive to be in frame).
33736 03 Jan 2024 @ 1100 --- mhvogel Castle had a major overnight
32936 16 Dec 2023 @ 0940 --- Pholli minor eruption this morning. steaming quietly with active bursts
28527 28 Sep 2023 @ 0830 --- User34 Huffing steam, one steamy splash, appears to have majored overnight
28440 24 Sep 2023 @ 1230 --- MikeG (wc) Looks like it had a minor overnight and is in sloppy phase.
28416 22 Sep 2023 @ 1640 --- jonp (WC) Appears to be in post-minor splashing mode
28229 12 Sep 2023 @ 0730 --- Ben VL Has had a major since last night's minor.
27513 11 Aug 2023 @ 0558 --- JimS Steaming quietly, had a major eruption overnight after the minor
27471 09 Aug 2023 @ 0609 --- JimS Steaming quietly. Had a major eruption overnight
27206 25 Jul 2023 @ 0600 --- JimS Sloshing. Boardwalk wet. Had a minor eruption
27079 16 Jul 2023 @ 0544 --- JimS Still sloshing. No major yet
27015 12 Jul 2023 @ 0530 --- JimS Steaming quietly. Had a major eruption overnight.
26954 09 Jul 2023 @ 0543 --- JimS Still sloshing. No major yet.
26781 02 Jul 2023 @ 0535 --- JimS Quietly steaming. Last eruption was a major
26757 01 Jul 2023 @ 0530 --- JimS Steaming quietly. Had a major eruption overnight
26688 27 Jun 2023 @ 0529 --- JimS Still trying to recover from overnight minor
26674 26 Jun 2023 @ 0538 --- JimS Must have had a minor overnight before the 0515 major
26389 17 Jun 2023 @ 0534 --- JimS Steaming quietly. Had a major eruption overnight
26350 16 Jun 2023 @ 0538 --- JimS Steaming quietly. Had a major eruption overnight.
26326 15 Jun 2023 @ 0538 --- JimS Sloshing. Had a minor eruption overnight.
26251 12 Jun 2023 @ 0530 --- JimS Quiet. Overnight eruption was a major.
26204 10 Jun 2023 @ 0555 --- JimS Steaming quietly. Overnight eruption was a major
25406 14 May 2023 @ 0610 --- User34 Still post-minor
25242 25 Apr 2023 @ 0839 --- Colin_W Looking like the last eruption was a minor.
25068 03 Mar 2023 @ 1426 --- Colin_W looks like it did a minor
25067 03 Mar 2023 @ 1044 --- ltgangi castle water could be seen just above tree line several times and then it died.down.
25031 23 Feb 2023 @ 0432 --- JarnoO possible start time of an eruption - frequently obscured by steam from elsewhere (primarily MYR) and darkness didn't help
24432 16 Oct 2022 @ 1800 --- Ben VL Almost no splashing seen in quite a while. I think either the 0316E was actually a major, or it has had one since.
24391 15 Oct 2022 @ 1136 --- Ben VL Castle back on after 5m of quiet. Done again @ 1139. See the 1127 entry for details.
23471 29 Aug 2022 @ 0615 --- JimS Sloshing. Had a minor eruption overnight.
23454 28 Aug 2022 @ 0618 --- JimS Sloshing. Had a minor eruption overnight.
23406 26 Aug 2022 @ 0615 --- JimS Steaming quietly. Had a major eruption overnight.
23380 24 Aug 2022 @ 0611 --- JimS Sloshing. Last eruption was a minor.
23342 22 Aug 2022 @ 0616 --- JimS Sloshing. Last eruption was a minor.
23308 21 Aug 2022 @ 0615 --- JimS Steaming quietly. Apparently had a major eruption overnight.
23222 17 Aug 2022 @ 0605 --- JimS Steaming quietly. Appears to have had a major eruption.
23110 09 Aug 2022 @ 0703 --- JimS Has been sloshing the last hour. Had a minor eruption overnight.
23095 08 Aug 2022 @ 0556 --- JimS Sloshing. Still trying to recover from minors.
23085 07 Aug 2022 @ 0621 --- JimS Has been steaming quietly. Had a major eruption overnight.
23067 06 Aug 2022 @ 0559 --- JimS Quiet. Had a major eruption overnight.
23022 04 Aug 2022 @ 0607 --- JimS Sloshing. Had a minor eruption overnight.
22970 02 Aug 2022 @ 0528 --- JimS Steaming gently, boardwalk soaked. Had a major eruption overnight.
22901 28 Jul 2022 @ 0540 --- JimS Steaming quietly, boardwalk soaked. Had a major eruption.
22872 27 Jul 2022 @ 0545 --- JimS Still sloshing. Has not yet had a major eruption.
22823 24 Jul 2022 @ 0543 --- JimS Splashing heavily. Had a minor eruption overnight.
22798 23 Jul 2022 @ 0534 --- JimS Splashing heavily. Trying to recover from a minor eruption. May have had a second minor overnight
22802 22 Jul 2022 @ 1934 --- DinosaursArentReal tourist showed me a video of castle erupting about 5 ft. video was timestamped from 1934-1939
22753 21 Jul 2022 @ 0547 --- JimS Quiet. Boardwalk soaked. Had a major eruption overnight.
22584 15 Jul 2022 @ 0535 --- JimS Was a major eruption.
22372 07 Jul 2022 @ 0524 --- JimS Steaming quietly. Had a major eruption overnight.
22348 06 Jul 2022 @ 0551 --- JimS Still trying to recover from a minor eruption. Splashing heavily.
22334 05 Jul 2022 @ 0514 --- JimS Quiet steaming. Had a major eruption overnight.
22278 02 Jul 2022 @ 0535 --- JimS Splashing frequently. Had a minor eruption overnight.
22254 01 Jul 2022 @ 0700 --- User34 Large heavy splashes, based on current interval it appears to have minored overnight
22194 29 Jun 2022 @ 0656 --- JimS Castle has been quiet indicating that its overnight eruption was a major
22136 26 Jun 2022 @ 1428 --- DaveM Major erption
21990 16 Jun 2022 @ 0630 --- RMichaels Castle is lightly billowing steam. It probably had a major sometime overnight.
21912 11 Jun 2022 @ 0800 --- Colin_W splashing on cone.
21150 02 May 2022 @ 0915 --- aferrara Heavy, tall splashing.
21134 30 Apr 2022 @ 1300 30 Apr 2022 @ 1630 User34 Splashing heavily
21077 25 Apr 2022 @ 0605 --- RMichaels Quiet. Castle appears to have had a major overnight.
20943 05 Apr 2022 @ 1326 --- Kevin L Castle was not erupting when I switched to Lion ie at 1238. I did a quick check before I switched to OF and Castle looked ie.
20764 29 Jan 2022 @ 0830 --- aferrara Castle is quietly steaming with rare, short splashes. No eruptions on the logger since 1447 yesterday.
20762 28 Jan 2022 @ 0000 --- aferrara Logger shows no eruption overnight.
20646 07 Jan 2022 @ 0900 --- aferrara Billowing steam with frequent splashing (5-15' or so over the top of the cone). Logger is having trouble reading majors vs minors right now, but I believe Art-P's major observation via the webcam. Castle looks remarkably like it did post-major in late June 2021, when its intervals became long and irregular.
20282 03 Nov 2021 @ 0822 --- DaveM Looking at the webcam capture, this was a minor.
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.