Castle Geyser

Last Known Eruption
13h 32m ago
Predicted Next Eruption
Today at 1715 ± 60 minutes
More predictions

Latest Eruptions

Eruption DurationInterval
27 Mar 2023 @ 0045 wc maj16h 43m
26 Mar 2023 @ 0802 wc maj5h 51m
26 Mar 2023 @ 0211 wc min15h 37m
25 Mar 2023 @ 1034 ie wc maj16h 20m
24 Mar 2023 @ 1814 ie wc maj22h 34m
23 Mar 2023 @ 1940 ie wc maj15h 45m
23 Mar 2023 @ 0355 wc maj15h 49m
22 Mar 2023 @ 1206 wc maj15h 40m
21 Mar 2023 @ 2026 wc maj15h 55m
21 Mar 2023 @ 0431 wc maj15h 13m
20 Mar 2023 @ 1318 ie wc maj15h 53m
19 Mar 2023 @ 2125 wc maj15h 18m
19 Mar 2023 @ 0607 ie wc maj18h 42m
18 Mar 2023 @ 1125 wc maj1d 3h 23m
17 Mar 2023 @ 0802 ie wc15h 28m
16 Mar 2023 @ 1634 ie wc1d 9h 5m
15 Mar 2023 @ 0729 wc maj15h 9m
14 Mar 2023 @ 1620 ie wc maj16h 12m
14 Mar 2023 @ 0008 wc maj15h 50m
13 Mar 2023 @ 0818 wc maj15h 42m
12 Mar 2023 @ 1636 ns wc maj15h 42m
11 Mar 2023 @ 2354 wc maj15h 57m
11 Mar 2023 @ 0757 ie wc maj15h 7m
10 Mar 2023 @ 1650 ie wc min16h 24m
10 Mar 2023 @ 0026 wc maj15h 54m
09 Mar 2023 @ 0832 ns wc maj15h 33m
08 Mar 2023 @ 1659 wc maj15h 19m
08 Mar 2023 @ 0140 wc maj16h 44m
07 Mar 2023 @ 0856 ie wc maj6h 4m
07 Mar 2023 @ 0252 wc min17h 5m
06 Mar 2023 @ 0947 wc maj5h 34m
06 Mar 2023 @ 0413 wc min~5m 17h 8m
05 Mar 2023 @ 1105 maj1d 55m
04 Mar 2023 @ 1010 maj17h 12m
03 Mar 2023 @ 1658 ie maj6h 16m
03 Mar 2023 @ 1042 ie wc min15h 35m
02 Mar 2023 @ 1907 wc maj17h 4m
02 Mar 2023 @ 0203 wc maj6h 8m
01 Mar 2023 @ 1955 wc min16h 3m
01 Mar 2023 @ 0352 wc maj16h 8m
28 Feb 2023 @ 1144 wc maj16h 4m
27 Feb 2023 @ 1940 wc maj15h 43m
27 Feb 2023 @ 0357 wc maj15h 44m
26 Feb 2023 @ 1213 ie wc maj15h 31m
25 Feb 2023 @ 2042 wc maj15h 51m
25 Feb 2023 @ 0451 wc maj15h 45m
24 Feb 2023 @ 1306 wc maj3d 20h 2m
20 Feb 2023 @ 1704 wc min4m 47s 1d 7h 11m
19 Feb 2023 @ 0953 wc maj16h 57m
18 Feb 2023 @ 1656 ie wc maj1d 5h 40m
17 Feb 2023 @ 1116 min3d 8h 23m
14 Feb 2023 @ 0253 wc maj17h 11m
13 Feb 2023 @ 0942 ie wc maj6h 16m
13 Feb 2023 @ 0326 A min16h 0m
12 Feb 2023 @ 1126 maj17h 26m
11 Feb 2023 @ 1800 wc maj10h 13m
11 Feb 2023 @ 0747 ie wc min18h 15m
10 Feb 2023 @ 1332 wc maj15h 47m
09 Feb 2023 @ 2145 ie wc maj16h 20m
09 Feb 2023 @ 0525 wc maj15h 49m
08 Feb 2023 @ 1336 ie wc maj15h 50m
07 Feb 2023 @ 2146 wc maj15h 41m
07 Feb 2023 @ 0605 wc maj16h 11m
06 Feb 2023 @ 1354 wc maj15h 39m
05 Feb 2023 @ 2215 wc maj15h 38m
05 Feb 2023 @ 0637 wc maj15h 46m
04 Feb 2023 @ 1451 wc maj16h 7m
03 Feb 2023 @ 2244 wc maj1d 10h 8m
02 Feb 2023 @ 1236 wc maj19h 2m
01 Feb 2023 @ 1734 wc min17h 31m
01 Feb 2023 @ 0003 wc maj7h 43m
31 Jan 2023 @ 1620 wc min16h 0m
31 Jan 2023 @ 0020 wc maj17h 2m
30 Jan 2023 @ 0718 wc maj21h 38m
29 Jan 2023 @ 0940 ns wc min15h 56m
28 Jan 2023 @ 1744 wc maj15h 53m
28 Jan 2023 @ 0151 wc maj15h 14m
27 Jan 2023 @ 1037 wc maj16h 27m
26 Jan 2023 @ 1810 wc maj17h 33m
26 Jan 2023 @ 0037 wc maj8h 19m
25 Jan 2023 @ 1618 wc min19h 48m
24 Jan 2023 @ 2030 A16h 30m
24 Jan 2023 @ 0400 A maj16h 23m
23 Jan 2023 @ 1137 maj15h 52m
22 Jan 2023 @ 1945 wc maj17h 30m
22 Jan 2023 @ 0215 A maj10h 19m
21 Jan 2023 @ 1556 ns wc min14h 19m
21 Jan 2023 @ 0137 wc maj7h 11m
20 Jan 2023 @ 1826 wc min17h 24m
20 Jan 2023 @ 0102 A maj6h 40m
19 Jan 2023 @ 1822 A min16h 30m
19 Jan 2023 @ 0152 wc maj16h 33m
18 Jan 2023 @ 0919 wc maj~18m 17h 38m
17 Jan 2023 @ 1541 wc maj14h 54m
17 Jan 2023 @ 0047 A17h 30m
16 Jan 2023 @ 0717 maj4h 53m
16 Jan 2023 @ 0224 wc min16h 24m
15 Jan 2023 @ 1000 maj6h 13m
15 Jan 2023 @ 0347 wc min15h 26m
14 Jan 2023 @ 1221 ns maj17h 12m

Interval Statistics

Interval Count100
Min4h 53m
Max3d 20h 2m
Mean17h 19m
Median15h 55m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
20182 29 Oct 2021 @ 0835 --- aferrara Castle erupted 2258E last night. Graph looks like a long minor but in the basin it looks like it majored overnight (billowing steam, no splashing or spritzing). Probably a major, but unclear.
19552 14 Sep 2021 @ 0025 --- Suzanne heard in steam phase from the boardwalk near Tardy
19549 13 Sep 2021 @ 1900 13 Sep 2021 @ 2115 William good splashing but no eruption during this time.
19503 12 Sep 2021 @ 0635 --- William in steam. had a major overnight.
19313 05 Sep 2021 @ 0805 --- Kitt B Appears to haveminored. Heavy splashing seen.
18428 15 Jul 2021 @ 0550 --- SteveO Had a major overnight, billowing steam and boardwalk is wet.
18412 14 Jul 2021 @ 0540 --- RMichaels Billowing steam as if it had a major eruption very early this morning.
18252 03 Jul 2021 @ 0543 --- JimS Quiet. Boardwalk soaked. Had a major eruption overnight.
18235 02 Jul 2021 @ 0530 --- JimS Quiet. Had a major eruption overnight.
18195 30 Jun 2021 @ 0532 --- JimS Quiet. Boardwalk soaked. Had major eruption overnight.
17967 21 Jun 2021 @ 1648 --- Graham VEC is now officially not predicting Castle. Recent intervals suggest 19 to 22h intervals without minors. Longer intervals started ~16th.
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 was no other eruption on the temp monitor 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.
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.
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.
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