Last Known Eruption
9h 5m ago

Latest Eruptions

EruptionDurationInterval
22 Jun 2017 @ 1035 ie20h 2m
21 Jun 2017 @ 1433 ns1d 2h 31m
20 Jun 2017 @ 1202 ie3h 58m
20 Jun 2017 @ 0804 ie16h 42m
19 Jun 2017 @ 1522 ie3h 50m
19 Jun 2017 @ 1132 ie1d 22h 20m
17 Jun 2017 @ 13125h 2m
17 Jun 2017 @ 0810 ie1d 20h 50m
15 Jun 2017 @ 1120 ie1d 1h 19m
14 Jun 2017 @ 1001 ie2d 3h 45m
12 Jun 2017 @ 0616 ie12h 13m
11 Jun 2017 @ 1803 ie9h 55m
11 Jun 2017 @ 0808 ie21h 7m
10 Jun 2017 @ 1101 ie4h 43m
10 Jun 2017 @ 0618 ie19h 15m
09 Jun 2017 @ 1103 ie4h 44m
09 Jun 2017 @ 0619 ie21h 35m
08 Jun 2017 @ 084421h 6m
07 Jun 2017 @ 1138 ns22h 42m
06 Jun 2017 @ 1256 ie4h 45m
06 Jun 2017 @ 0811 ns20h 48m
05 Jun 2017 @ 112321h 26m
04 Jun 2017 @ 1357 ns5h 25m
04 Jun 2017 @ 083219h 24m
03 Jun 2017 @ 1308 ie4h 24m
03 Jun 2017 @ 0844 ns20h 19m
02 Jun 2017 @ 1225 ie5h 13m
02 Jun 2017 @ 0712 ie22h 52m
01 Jun 2017 @ 08201d 22h 46m
30 May 2017 @ 093423h 50m
29 May 2017 @ 0944 ie2d 2h 10m
27 May 2017 @ 073420h 34m
26 May 2017 @ 1100 ie2d 20h 58m
23 May 2017 @ 14026h 7m
23 May 2017 @ 0755 ie1d 1h 25m
22 May 2017 @ 0630 ie10h 53m
21 May 2017 @ 19371d 18m
20 May 2017 @ 191913h 4m
20 May 2017 @ 0615 ie17h 1m
19 May 2017 @ 1314 ie6h 56m
19 May 2017 @ 0618 ie13h 16m
18 May 2017 @ 1702 ie2d 5h 37m
16 May 2017 @ 1125 ie17h 36m
15 May 2017 @ 1749 ns3d 11h 46m
12 May 2017 @ 0603 ie21h 13m
11 May 2017 @ 0850 ie20h 59m
10 May 2017 @ 1151 ns1d 3h 31m
09 May 2017 @ 0820 ns21h 22m
08 May 2017 @ 105821h 13m
07 May 2017 @ 134519h 19m
06 May 2017 @ 18267h 31m
06 May 2017 @ 1055 ie23h 24m
05 May 2017 @ 1131 ie17h 39m
04 May 2017 @ 175212h 16m
04 May 2017 @ 0536 ie11h 48m
03 May 2017 @ 1748 ie7h 13m
03 May 2017 @ 10355h 5m
03 May 2017 @ 0530 ns16h 32m
02 May 2017 @ 1258 ie6h 38m
02 May 2017 @ 0620 ie14h 1m
01 May 2017 @ 1619 ie8h 59m
01 May 2017 @ 0720 ie15h 12m
30 Apr 2017 @ 1608 ie6h 20m
30 Apr 2017 @ 0948about 3 hrs17h 8m
29 Apr 2017 @ 16404h 53m
29 Apr 2017 @ 11471 h 53 m4h 29m
29 Apr 2017 @ 0718 ie20h 12m
28 Apr 2017 @ 11062d 4h 6m
26 Apr 2017 @ 0700 ie1d 13h 42m
24 Apr 2017 @ 17181d 9h 48m
23 Apr 2017 @ 0730 ie23h 38m
22 Apr 2017 @ 0752 ie49m
22 Apr 2017 @ 0703 ie wc12h 12m
21 Apr 2017 @ 1851 ns7h 46m
21 Apr 2017 @ 1105 ie33d 23h 6m
18 Mar 2017 @ 1159 ie6d 1h 52m
12 Mar 2017 @ 1007 ie7d 20h 42m
04 Mar 2017 @ 1225 ie1d 14m
03 Mar 2017 @ 1211 ie11d 1h 16m
20 Feb 2017 @ 1055 ie4d 11m
16 Feb 2017 @ 1044 ie19d 1h 56m
28 Jan 2017 @ 084818h 30m
27 Jan 2017 @ 1418 ie6h 23m
27 Jan 2017 @ 0755 ie17h 14m
26 Jan 2017 @ 1441 ie1d 27m
25 Jan 2017 @ 1414 ie1d 2h 40m
24 Jan 2017 @ 1134 ie1d 22h 5m
22 Jan 2017 @ 1329 ie17d 22h 49m
04 Jan 2017 @ 1440 ie12d 21h 56m
22 Dec 2016 @ 1644 ie46d 4h 42m
06 Nov 2016 @ 1202 ie1d 54m
05 Nov 2016 @ 1208 ie22h 24m
04 Nov 2016 @ 134412d 4h 12m
23 Oct 2016 @ 0932 ie wc1d 22h 10m
21 Oct 2016 @ 1122 ns1d 39m
20 Oct 2016 @ 1043 ie wc16h 58m
19 Oct 2016 @ 1745 ie wc3d 7h 57m
16 Oct 2016 @ 0948 ie13h 9m
15 Oct 2016 @ 2039 ie wc7h 58m
15 Oct 2016 @ 12416h 19m

Interval Statistics

Interval Count100
Min49m
Max46d 4h 42m
Mean2d 12h 2m
Median20h 26m

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4346 21 Jun 2017 @ 1220 --- Polly Grotto shut off at 1220 per Janet and Barbara.
4334 18 Jun 2017 @ 1838 --- WillBoekel turned off.
4324 15 Jun 2017 @ 1450 --- Polly Steam from Grotto (seen from F&M) but not positive it had started at this time or a bit later. Was seen ie before 1545 and was off before 1645.
4318 15 Jun 2017 @ 0650 --- B**2 Just finished a shutdown.
4244 06 Jun 2017 @ 2000 --- Archer Grotto had a marathon today - around this time Bijou was still off but sputtering. Marathon Pool was down a few inches and unsettled. There is a morning start time for Grotto today and also an ie time just a few hours later - was this possibly the same eruption?
4092 13 May 2017 @ 0605 --- JimS Marathon over sometime before 0605. Marathon pool down about 18 inches.
3869 06 Nov 2016 @ 1253 --- WillBoekel turned off.
3767 30 Sep 2016 @ 1635 --- bhoppe eruption end at 1635
3694 20 Sep 2016 @ 1105 --- LotusBaker Grotto is ie for awhile by splashing
3656 13 Sep 2016 @ 1634 --- LotusBaker stopped at 1634
3674 09 Sep 2016 @ 1155 --- bhoppe eruption end at 1155
3425 05 Aug 2016 @ 1827 --- bhoppe Eruption end at 1827.
3293 12 Jul 2016 @ 0932 --- cb OFF @ 0932
3201 04 Jul 2016 @ 0802 --- User34 Off, but rumbling loudly and water still running in runoff channels
3043 10 Jun 2016 @ 1942 --- bhoppe Eruption ended. Last water at 1942
3004 07 Jun 2016 @ 1151 --- Barbara Lasseter eruption ended
2970 05 Jun 2016 @ 0755 --- AndrewW Off by 0755
2948 02 Jun 2016 @ 1533 --- BobInSLC still ie
2859 20 May 2016 @ 1531 --- Jake no longer erupting. no steam visible on webcam. possible end time could've been anywhere in the last 3 hours
2742 16 Apr 2016 @ 1458 --- Siegmund Central Vents started 1458, killed Grotto Fountain and caused a textbook 40-minute delay.
2651 17 Jan 2016 @ 1234 --- Graham Central vents started , d=8m
2554 16 Oct 2015 @ 1156 16 Oct 2015 @ 1220 User34 Shut off sometime between 1200 and 1220
2473 04 Oct 2015 @ 1000 --- WillBoekel appears to be off from castle.
2468 03 Oct 2015 @ 2015 --- Archer Grotto had not yet restarted at this time.
2462 03 Oct 2015 @ 0815 --- JimS Quiet. Marathon over.
2452 01 Oct 2015 @ 1300 --- JimS The Grotto this morning did not lead to a marathon.
2447 30 Sep 2015 @ 1725 --- Jake Grotto finished erupting about 1725. Possible 18hr+ eruption, Grotto and Spa were ie at 0600
2349 14 Sep 2015 @ 1525 --- bhoppe Grotto off upon passing. Marathon ended between 1215 and 1525.
2350 14 Sep 2015 @ 1441 --- decooper Waited at Grotto until 1305 for the 24 hour marathon mark. When I biked by at 1441 it was off.
2343 14 Sep 2015 @ 0700 --- bhoppe Still in marathon from yesterday 1302 eruption
2272 06 Sep 2015 @ 0720 --- Jake had a marathon overnight. Spa is wet. Bijou off.
2149 14 Aug 2015 @ 1231 --- JSJ Already off at 1231.
1943 20 Jul 2015 @ 1325 --- SteveO 2 big splashes out the back, Grotto, & Rocket sloshed around a bit with the Central vents going. Then stop after 3 or 4 minutes.
1648 26 May 2015 @ 1900 --- Archer Central Vents in play.
828 12 Jun 2013 @ 2225 12 Jun 2013 @ 2345 Micah Kipple large cloud of steam hanging above grotto and Giant area most of the time I was at Grand 2225-2345
384 13 Aug 2012 @ 1212 --- rbwhitaker Still ie at 12:12
366 24 Jul 2012 @ 0000 24 Jul 2012 @ 2359 Graham In marathon since about midnight
369 24 Jul 2012 @ 2200 --- Graham Marathon ended approx 2200-2300
195 29 Apr 2012 @ 1327 --- WillBoekel Grotto was off at 1327
640 31 Jan 2011 @ 0000 31 Jan 2011 @ 2359 BoekelUpload marathon ?
1028 17 Oct 2008 @ 0900 --- BoekelUpload end ~09:00
1015 12 Sep 2008 @ 1710 13 Sep 2008 @ 1300 BoekelUpload started marathon 17:10 9/12 still ie 13:00 9/13
1007 05 Sep 2008 @ 0700 --- BoekelUpload marathon overnight; off @ 07:00
1002 22 Aug 2008 @ 0000 22 Aug 2008 @ 2359 BoekelUpload marathon
992 06 Aug 2008 @ 0620 --- BoekelUpload not ie 06:20
990 04 Aug 2008 @ 0530 --- BoekelUpload not ie 05:30
985 26 Jul 2008 @ 0530 --- BoekelUpload off @ 5:30
954 28 Apr 2008 @ 1830 --- BoekelUpload off at 18:30
945 04 Mar 2008 @ 0930 --- BoekelUpload off at 9:30
942 28 Feb 2008 @ 0930 --- BoekelUpload off at 09:30
939 12 Feb 2008 @ 0930 --- BoekelUpload off @ 09:30
934 05 Feb 2008 @ 0940 --- BoekelUpload off at 09:40
930 31 Jan 2008 @ 0930 31 Jan 2008 @ 1000 BoekelUpload off at 09:30 and 10:00
924 24 Jan 2008 @ 0902 --- BoekelUpload off at 09:02
918 09 Jan 2008 @ 0855 --- BoekelUpload off at 08:55
917 08 Jan 2008 @ 0800 --- BoekelUpload off @ 08:00 vr
916 05 Jan 2008 @ 1030 --- BoekelUpload on 10:30 vr
915 05 Jan 2008 @ 0925 --- BoekelUpload off at 09:25
1351 14 Oct 2007 @ 0800 14 Oct 2007 @ 1435 BoekelUpload in marathon 08:00ie; off 14:35
1350 21 Sep 2007 @ 0100 21 Sep 2007 @ 0600 BoekelUpload still on @ 01:00; off before 06:00
1349 19 Sep 2007 @ 1040 --- BoekelUpload off @ 10:40
1348 15 Sep 2007 @ 0600 --- BoekelUpload off by 6:00
1347 14 Sep 2007 @ 0600 --- BoekelUpload not ie 06:00
1346 12 Sep 2007 @ 1200 --- BoekelUpload marathon end ~ 12:00
1345 08 Sep 2007 @ 0702 08 Sep 2007 @ 0745 BoekelUpload still ie 07:02; off by 7:45
1344 07 Sep 2007 @ 0600 --- BoekelUpload off before 06:00
1343 05 Sep 2007 @ 0743 --- BoekelUpload marathon; end 7:43 d=~17h
1342 01 Sep 2007 @ 0000 01 Sep 2007 @ 2359 BoekelUpload marathon
1341 24 Aug 2007 @ 0500 24 Aug 2007 @ 0530 BoekelUpload end marathon ~ 05:00 - 05:30
1340 14 Aug 2007 @ 0600 --- BoekelUpload off before 06:00
1339 06 Aug 2007 @ 0645 --- BoekelUpload end marathon ~ 06:45
1338 27 Jul 2007 @ 2016 --- BoekelUpload ~ 27 hour marathon ended 20:16
1337 17 Jul 2007 @ 0700 17 Jul 2007 @ 1658 BoekelUpload still erupting @ 07:00 end 16:38; end 16:58
1336 12 Jul 2007 @ 1000 --- BoekelUpload marathon end ~ 10:00 (start 17:13 7/11)
1335 09 Jul 2007 @ 0744 --- BoekelUpload marathon ended ~ 7:44
1334 06 Jul 2007 @ 1947 06 Jul 2007 @ 2007 BoekelUpload start between 19:47 - 20:07
1333 06 Jul 2007 @ 0645 --- BoekelUpload shut off 6:45 marathon from 17:29 7/5
1332 05 Jul 2007 @ 0415 05 Jul 2007 @ 0145 BoekelUpload end marathon ~ 04:15
1331 02 Jul 2007 @ 1000 --- BoekelUpload in marathon end ~ 10:00
1330 28 Jun 2007 @ 0644 --- BoekelUpload ended 6:44 6/27 marathon ~ 04:30 6/28
1329 26 Jun 2007 @ 0615 --- BoekelUpload 16 hr marathon off @ 06:15
1328 20 Jun 2007 @ 0754 --- BoekelUpload end marathon 7:54 d=~14.5h
1327 18 Jun 2007 @ 0000 18 Jun 2007 @ 0430 BoekelUpload ie before 4:30; marathon
1326 16 Jun 2007 @ 0600 16 Jun 2007 @ 0630 BoekelUpload end ~6:00
1325 14 Jun 2007 @ 0656 --- BoekelUpload off 6:56
1324 11 Jun 2007 @ 0000 11 Jun 2007 @ 2359 BoekelUpload marathon continues
1323 31 May 2007 @ 0030 --- BoekelUpload off before 00:30
1322 28 May 2007 @ 0000 28 May 2007 @ 0452 BoekelUpload marathon off before 04:52
1321 17 May 2007 @ 1005 --- BoekelUpload off ~ 10:05
1320 05 May 2007 @ 0000 05 May 2007 @ 2359 BoekelUpload post-marathon
1319 28 Apr 2007 @ 0500 --- BoekelUpload marathon end est. 05:00
1318 26 Apr 2007 @ 0820 26 Apr 2007 @ 0840 BoekelUpload off between 8:20 and 8:40
1317 20 Mar 2007 @ 1500 20 Mar 2007 @ 1530 BoekelUpload off 15:00 - 15:30
1316 02 Mar 2007 @ 0920 --- BoekelUpload off @ 09:20
1315 06 Feb 2007 @ 0000 06 Feb 2007 @ 1200 BoekelUpload off in am
1314 30 Jan 2007 @ 0930 --- BoekelUpload off 09:30
1313 27 Jan 2007 @ 0930 --- BoekelUpload off 09:30
1312 02 Jan 2007 @ 0930 --- BoekelUpload off @ 09:30
EntrySourceLinkComment
14 Aug 2015 @ 1314 JSJ https://www.flickr.com/photos/jsjgeology/21145226344 Photo of Grotto Geyser's 1:14 PM-onward eruption on 14 August 2015.
08 Jul 2014 @ 1430 JSJ https://www.flickr.com/photos/jsjgeology/15106150617 Photo of Grotto Geyser erupting during the mid-afternoon of 8 July 2014.
Baseline does not exist.


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