Last Known Eruption
3h 34m ago
Predicted Next Eruption
Today at 2255 ± 105 minutes

Latest Eruptions

EruptionDurationCodeInterval
19 Jan 2017 @ 1500 wc-1-6h 18m
19 Jan 2017 @ 0842 wc---6h 12m
19 Jan 2017 @ 0230 wc---6h 53m
18 Jan 2017 @ 1937 wc---7h 2m
18 Jan 2017 @ 1235 wc---20h 34m
17 Jan 2017 @ 1601---7h 51m
17 Jan 2017 @ 0810 E---7h 3m
17 Jan 2017 @ 0107 wc---8h 0m
16 Jan 2017 @ 1707 wc-2-6h 47m
16 Jan 2017 @ 1020 wc---7h 1m
16 Jan 2017 @ 0319 wc---7h 44m
15 Jan 2017 @ 1935 E---6h 39m
15 Jan 2017 @ 1256 wc---7h 14m
15 Jan 2017 @ 0542 wc---6h 42m
14 Jan 2017 @ 2300 wc---6h 36m
14 Jan 2017 @ 1624 ns wc---6h 13m
14 Jan 2017 @ 1011 ns---9h 20m
14 Jan 2017 @ 0051 wc---10h 42m
13 Jan 2017 @ 1409 wc-1-7h 4m
13 Jan 2017 @ 0705 ns---7h 4m
13 Jan 2017 @ 0001 ns wc---8h 5m
12 Jan 2017 @ 1556 wc-1-7h 59m
12 Jan 2017 @ 0757 wc---13h 39m
11 Jan 2017 @ 1818 wc---6h 28m
11 Jan 2017 @ 1150 wc-1-13h 17m
10 Jan 2017 @ 2233 wc---5h 59m
10 Jan 2017 @ 1634 ie wc---6h 23m
10 Jan 2017 @ 1011 wc---13h 52m
09 Jan 2017 @ 2019 ie wc---7h 57m
09 Jan 2017 @ 1222 wc---7h 27m
09 Jan 2017 @ 0455 E---6h 26m
08 Jan 2017 @ 2229 E---6h 39m
08 Jan 2017 @ 1550 ie---6h 47m
08 Jan 2017 @ 0903 ie wc---7h 10m
08 Jan 2017 @ 0153 wc---7h 13m
07 Jan 2017 @ 1840 E---6h 56m
07 Jan 2017 @ 1144 E---10h 6m
07 Jan 2017 @ 0138 E---7h 59m
06 Jan 2017 @ 1739 wc---6h 58m
06 Jan 2017 @ 1041 ns wc---8h 47m
06 Jan 2017 @ 0154 ns wc---6h 55m
05 Jan 2017 @ 1859 wc---8h 51m
05 Jan 2017 @ 1008 wc---14h 58m
04 Jan 2017 @ 1910 wc---6h 59m
04 Jan 2017 @ 1211D4/T1C8h 38m
04 Jan 2017 @ 0333 wc---6h 59m
03 Jan 2017 @ 2034 wc---8h 58m
03 Jan 2017 @ 1136~8m 30s D0/T1Q6h 35m
03 Jan 2017 @ 0501 wc---16h 25m
02 Jan 2017 @ 1236~10m T1Q22h 7m
01 Jan 2017 @ 1429---21h 3m
31 Dec 2016 @ 1726 wc-2-6h 22m
31 Dec 2016 @ 1104 ? ie wc---12h 42m
30 Dec 2016 @ 2222 wc---12h 17m
30 Dec 2016 @ 1005 wc---6h 35m
30 Dec 2016 @ 0330 wc---14h 34m
29 Dec 2016 @ 1256 ns11m --Q18h 40m
28 Dec 2016 @ 1816 wc---8h 58m
28 Dec 2016 @ 0918 wc---14h 11m
27 Dec 2016 @ 1907 ie wc---18h 42m
27 Dec 2016 @ 0025 wc---7h 15m
26 Dec 2016 @ 1710 wc-1-9h 8m
26 Dec 2016 @ 0802 wc---8h 15m
25 Dec 2016 @ 2347 wc---6h 59m
25 Dec 2016 @ 1648 wc---9h 37m
25 Dec 2016 @ 0711 E---7h 31m
24 Dec 2016 @ 2340 wc---6h 55m
24 Dec 2016 @ 1645 ns--C12h 58m
24 Dec 2016 @ 0347 wc---14h 10m
23 Dec 2016 @ 1337 wc---21h 3m
22 Dec 2016 @ 1634-1Q1d 2h 1m
21 Dec 2016 @ 1433 wc---8h 14m
21 Dec 2016 @ 0619 wc---7h 15m
20 Dec 2016 @ 2304 wc-1-7h 39m
20 Dec 2016 @ 1525T2C10h 7m
20 Dec 2016 @ 0518 wc---6h 54m
19 Dec 2016 @ 2224 wc---7h 6m
19 Dec 2016 @ 1518 ie wc---8h 16m
19 Dec 2016 @ 0702 wc---7h 7m
18 Dec 2016 @ 2355 wc-2-7h 23m
18 Dec 2016 @ 1632 wc---6h 46m
18 Dec 2016 @ 0946 wc-2-9h 54m
17 Dec 2016 @ 2352 wc-2-7h 32m
17 Dec 2016 @ 1620 wc---1d 9m
16 Dec 2016 @ 161119m G--1d 3h 9m
15 Dec 2016 @ 1302 wc---21h 38m
14 Dec 2016 @ 1524 wc---21h 15m
13 Dec 2016 @ 1809 wc-1-7h 5m
13 Dec 2016 @ 1104 ? ie wc---8h 5m
13 Dec 2016 @ 0259 wc-2-8h 48m
12 Dec 2016 @ 1811 wc-1-6h 52m
12 Dec 2016 @ 1119 wc-1-6h 28m
12 Dec 2016 @ 0451 wc---13h 17m
11 Dec 2016 @ 1534 wc---6h 55m
11 Dec 2016 @ 0839 wc---6h 40m
11 Dec 2016 @ 0159 wc---6h 21m
10 Dec 2016 @ 1938 wc-1-7h 18m
10 Dec 2016 @ 1220 wc---7h 3m
10 Dec 2016 @ 0517 wc---7h 12m
09 Dec 2016 @ 2205 wc-2-7h 53m

Interval Statistics

Interval Count100
Min5h 59m
Max1d 3h 9m
Mean9h 50m
Median7h 31m
Grand-Specific
Start4T/1G (80% T)
Max Bursts2
Mean Bursts1.36
Median Bursts1
End4Q/3C (57.14% Q)

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
3901 24 Dec 2016 @ 1747 --- Betty Steam cloud in Grand area, so it possibly went. Hard to tell in the dim light and vanishing visibility.
3877 23 Nov 2016 @ 0820 --- vw Very large steam plume, but I was unable to see water during approx. 10m of heavy steam. Too uncertain to log as an eruption. Review of video may reveal better determination.
3862 06 Nov 2016 @ 0824 --- WillBoekel pool pretty full but not in overflow.
3861 06 Nov 2016 @ 0625 --- Graham Big steam cloud from Grand or Oblong. Not sure which.
3800 23 Oct 2016 @ 1301 --- Janet White Water in Grand but still a ways to overflow
3774 10 Oct 2016 @ 0939 --- ACarlson Sorry. No E time. Logger is not working.
3764 09 Oct 2016 @ 0756 --- SteveO Grand is empty
3732 01 Oct 2016 @ 0805 --- bhoppe Pool was in overflow, but was quite low during Turban eruption.
3717 26 Sep 2016 @ 0722 --- Kitt B Grand 0722 ie? hearing it from Beehive overlook
3714 25 Sep 2016 @ 0551 --- Betty Steam cloud in the right area, but it is too dark to be sure
3690 20 Sep 2016 @ 0755 --- JimS First water came into the pool.
3687 19 Sep 2016 @ 0640 --- JimS Pool in overflow.
3682 17 Sep 2016 @ 2242 --- ARoe Left Grand. Had not erupted yet.
3675 16 Sep 2016 @ 1505 --- Devin C. At 1500 the pool was full and waving. At 1502 Grand started splashing and doming about four times to 1-4 feet tall. It then died. Pool dropped and turban was at 1507.
3659 14 Sep 2016 @ 0727 --- JimS Pool in overflow at 727 when I returned from beehive.
3658 14 Sep 2016 @ 0659 --- JimS Almost in overflow at 0659.
3650 12 Sep 2016 @ 0701 --- JimS Already in overflow at 0701.
3644 11 Sep 2016 @ 0826 --- JimS Overflow started at 0826.
3643 11 Sep 2016 @ 0714 --- JimS Below overflow at 0714.
3613 07 Sep 2016 @ 0629 --- JimS Already in overflow when I arrived at 0629.
3607 06 Sep 2016 @ 0636 --- JimS Already in overflow when I arrived at 0636.
3602 05 Sep 2016 @ 0640 --- JimS Pool was already in overflow when I arrived at 0640.
3598 04 Sep 2016 @ 0628 --- JimS Pool empty. Turban and Vent quiet at 0628.
3594 02 Sep 2016 @ 0046 --- DGInc Might've erupted. Visible steam for about 10 to 11 minutes.
3584 01 Sep 2016 @ 0530 01 Sep 2016 @ 0630 JimS Pool empty and Vent and Turban quiet at 0530. First water at 0630.
3588 01 Sep 2016 @ 0435 --- DGInc Might've erupted
3585 31 Aug 2016 @ 2203 --- DGInc Might've erupted. 2204 is also possible.
3577 31 Aug 2016 @ 0528 --- JimS In overflow at 0528.
3574 30 Aug 2016 @ 0538 --- JimS Pool in overflow.
3569 29 Aug 2016 @ 0615 --- JimS Empty. Turban ie but no Vent.
3571 29 Aug 2016 @ 0411 --- DGInc Might've erupted. Duration was approximately 10 minutes
3527 22 Aug 2016 @ 1034 --- udo 11 minutes into Turban cycle Grand started full pool having waves.
3509 19 Aug 2016 @ 0626 --- JimS The pool at 0626 looks right for an eruption at about 0326.
3507 19 Aug 2016 @ 0326 --- Betty mentioned Grand ie at 0326
3451 09 Aug 2016 @ 0535 --- JimS Pool empty. Vent and Turban quiet.
3404 02 Aug 2016 @ 0452 --- DGInc Might've been in eruption.
3334 21 Jul 2016 @ 0610 --- JimS Overflow started 0610.
3311 18 Jul 2016 @ 0538 --- JimS Overflow from pool started at 0538.
3288 11 Jul 2016 @ 0551 --- JimS Pool in overflow at 0551. Possibly start of overflow.
3289 11 Jul 2016 @ 0043 --- DGInc MAY have erupted. Oblong is also a possibility. Due to the blurriness of the webcam it isn't visible as good as I would've liked, but it looked like 9 to 10 minutes. Maybe an E-time wouldn't be that bad to have though...
3287 11 Jul 2016 @ 0010 --- AndrewW Left at 0010. No eruption yet, left on good pool that did not produce eruption. Great overflow at early at 12 minute mark, dropped at 16 minute mark. Ridges when turban erupted. Previous two fills were poor.
3281 10 Jul 2016 @ 0542 --- JimS Pool in overflow.
3283 10 Jul 2016 @ 0012 --- DGInc May have erupted. Duration was about 10 minutes
3267 09 Jul 2016 @ 0520 --- JimS Pool already in overflow at 0520.
3269 09 Jul 2016 @ 0036 --- DGInc May have erupted. Duration was about 10 minutes, even though it is really hard to see (fancy 360p video quality)
3254 08 Jul 2016 @ 0538 --- JimS Overflow from the pool started 0538.
3256 08 Jul 2016 @ 0056 --- DGInc May have erupted. Last visible steam was about 10 to 11 minutes after noticing it.
3234 07 Jul 2016 @ 0514 --- JimS Pool empty. Vent and Turban quiet.
3222 06 Jul 2016 @ 0111 --- DGInc Might have erupted at that time. Due to the blurriness it is almost unseeable. Duration was about 10 to 11 minutes.
3209 05 Jul 2016 @ 0524 --- JimS Pool empty. Vent and Turban quiet.
3187 03 Jul 2016 @ 0500 --- Graham In overflow.
3163 01 Jul 2016 @ 0530 --- JimS Pool in overflow at 0530.
3135 26 Jun 2016 @ 0247 --- DaveM Appeared to be post eruptive at 0247 when web camera restarted
3133 25 Jun 2016 @ 0601 --- JimS Start of overflow.
3132 25 Jun 2016 @ 0521 --- JimS Pool below overflow.
3130 24 Jun 2016 @ 0214 24 Jun 2016 @ 0246 DGInc May have erupted during the nightly reset of the webcam. Some steam was visible in that area (maybe Turban and Vent continued until 0323?) and I haven't seen a Grand before or after the interuption.
3083 17 Jun 2016 @ 0511 --- JimS Pool in overflow at 0511.
3077 16 Jun 2016 @ 0533 --- JimS Pool in overflow, Turban ie at 0533.
3055 12 Jun 2016 @ 0512 --- JimS Pool in overflow, no eruption yet.
3045 11 Jun 2016 @ 0508 --- JimS Some water in pool but well below overflow.
3033 10 Jun 2016 @ 0506 --- JimS Pool empty, Turban ie.
3016 09 Jun 2016 @ 0545 --- JimS First ? water into the pool at 0545.
3015 09 Jun 2016 @ 0504 --- JimS Pool empty, Vent and Turban quiet.
3003 07 Jun 2016 @ 0117 --- DGInc May have erupted @ 0117
2989 06 Jun 2016 @ 0530 --- JimS First ? water came into the pool.
2987 06 Jun 2016 @ 0515 --- JimS Pool empty, Vent and Turban quiet.
2969 05 Jun 2016 @ 0519 --- JimS First ? water into three pool at 0519.
2968 05 Jun 2016 @ 0515 --- JimS Pool empty, Turban and Vent quiet.
2944 02 Jun 2016 @ 0518 --- JimS Pool in overflow on my arrival at 0518.
2930 01 Jun 2016 @ 0524 --- JimS First ? water entering pool at 0524.
2929 01 Jun 2016 @ 0509 --- JimS Pool empty. Turban alone ie.
2932 01 Jun 2016 @ 0359 --- DGInc May have erupted at 0359. Steam cloud was visible on the webcam captures. Duration was about 10 minutes. EDIT: it was apparently Oblong
2924 31 May 2016 @ 0521 --- JimS In overflow at 0521.
2919 30 May 2016 @ 0601 --- JimS Start of overflow from pool at 0601.
2915 29 May 2016 @ 0520 29 May 2016 @ 0604 JimS Vent and Turban ie at 0520. Both ended at 0604.
2912 29 May 2016 @ 0401 --- Suzanne No eruption as of 0401.
2895 26 May 2016 @ 0520 --- JimS Pool empty. Vent and Turban quiet.
2888 25 May 2016 @ 0523 --- JimS Pool empty. Vent and Turban quiet.
2868 21 May 2016 @ 2143 --- DaveM Grand erupted. But since "eyes in the basin are most often more reliable than eyes through the webcam" I hope someone in the basin saw the eruption.
2852 18 May 2016 @ 0712 --- JimS Start of overflow from pool at 0712.
2850 17 May 2016 @ 0535 --- JimS Post eruption with Turban and Vent ie.
2825 09 May 2016 @ 0718 --- JimS First overflow from pool at 0718.
2824 09 May 2016 @ 0554 --- JimS Small amount of water visible in pool , Turban ie.
2705 07 Mar 2016 @ 0539 --- DGInc Possibly post-eruptive @ 0539
2696 22 Feb 2016 @ 0555 --- DGInc Grand possibly ie. Steam cloud was bigger than normal and was still there at 0602.
2687 17 Feb 2016 @ 0540 --- DGInc Point of reference for DaveM when he watches the webcam captures: Grand possibly ie at 0540. Stripe of light in the background is interrupted by a steam cloud at Grand area.
2673 11 Feb 2016 @ 1405 --- WillBoekel first water in pool
2666 24 Jan 2016 @ 0255 --- DaveM Post eruptive when webcam came back on. Erupted sometime between 0150 and 0222.
2630 21 Dec 2015 @ 1235 --- Tara Vent and Turban i.e., Grand post-eruptive
2584 26 Oct 2015 @ 1020 --- ACarlson Post-eruptive at 10:20 AM
2500 10 Oct 2015 @ 0757 --- WillBoekel Water just visible in the pool.
2470 04 Oct 2015 @ 0650 --- JimS Pool empty. Vent and Turban quiet.
2459 03 Oct 2015 @ 0650 --- JimS Pool is in overflow at 0650.
2454 02 Oct 2015 @ 0717 --- User34 Empty crater
2441 30 Sep 2015 @ 0557 --- Jake pool empty. Vent and Turban erupting
2428 28 Sep 2015 @ 0642 --- JimS Pool empty. Turban ie but Vent quiet at 0642. Turban stopped at 0644.
2425 27 Sep 2015 @ 0621 --- JimS Pool empty. Vent and Turban ie at 0621.
2421 26 Sep 2015 @ 0723 --- WillBoekel first overflow
2414 24 Sep 2015 @ 0645 --- JimS Pool is in overflow at 0645.
2402 22 Sep 2015 @ 0645 --- JimS Pool empty. Vent and Turban quiet at 0645.
EntrySourceLinkComment
08 Jun 2016 @ 1409 JSJ https://www.flickr.com/photos/jsjgeology/31182392056 Thermal image (1 of 8) of Grand Geyser's 2:09 to 2:20 PM eruption on 8 June 2016.
08 Jun 2016 @ 1409 JSJ https://www.flickr.com/photos/jsjgeology/31182537916 Photo (1 of 12) of Grand Geyser's 2:09 to 2:20 PM eruption on 8 June 2016.
11 Aug 2016 @ 1454 JSJ https://www.flickr.com/photos/jsjgeology/29895281572 Photo (1 of 12) of Grand Geyser's 2:54 to 3:06 PM eruption on 11 August 2016.
15 Aug 2015 @ 1057 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=13m58s Clips 27-31 of this video compilation (time stamp 13:58 to the end) show Grand Geyser's 10:57 to 11:09 AM eruption on 15 August 2015.
07 Aug 2015 @ 1945 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=12m00s Clips 20-26 of this video compilation (time stamp 12:00 to 13:58) show Grand Geyser's 7:45 to 7:56 PM eruption on 7 August 2015.
06 Jul 2015 @ 1435 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=11m27s Clips 17-19 of this video compilation (time stamp 11:27 to 12:00) show Grand Geyser's 2:35 to 2:46 PM eruption on 6 July 2015.
20 May 2015 @ 1927 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=5m26s Clips 13-16 of this video compilation (time stamp 5:25 to 11:27) show Grand Geyser's 7:27 to 7:40 PM eruption on 20 May 2015.
18 May 2015 @ 1639 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4 Clips 1-8 of this video compilation (time stamp 0:00 to 4:17) show Grand Geyser's 4:39 to 4:49 PM eruption on 18 May 2015.
04 Sep 2002 @ 1213 JSJ https://www.youtube.com/watch?v=oW-EWQ60ZwI Video of Grand Geyser's 12:10 PM eruption on 4 September 2002 - 3 bursts + afterburst.
28 Aug 2013 @ 1731 JSJ https://www.youtube.com/watch?v=Myae9uC9qp8 Video by Micah Kipple of the 2nd burst of Grand Geyser's late afternoon eruption on 28 August 2013.
28 Aug 2013 @ 1731 JSJ https://www.youtube.com/watch?v=mtjkvtfaPN8 Video by Micah Kipple of the initiation of Grand Geyser's 5:30 PM eruption on 28 August 2013.
05 Jul 2013 @ 0849 JSJ https://www.youtube.com/watch?v=kYDQyexnLfI Video by Micah Kipple of the 5 July 2013 morning eruption of Grand Geyser.
28 Jun 2013 @ 0834 JSJ https://www.youtube.com/watch?v=MZjEKbivLug Video by Micah Kipple of the 28 June 2013 morning eruption of Grand Geyser.
06 Aug 2013 @ 1307 Micah Kipple https://www.flickr.com/photos/128128779@N05/15606907148 flickr
27 Jul 2014 @ 1538 Micah Kipple https://www.flickr.com/photos/joshy55013/15630773769 flickr
24 Sep 2014 @ 1256 Micah Kipple https://www.flickr.com/photos/126760153@N03/15828712802 flickr
20 Sep 2014 @ 1611 Micah Kipple https://www.flickr.com/photos/129696754@N08/15877864399 flickr
10 Jun 2014 @ 1327 Micah Kipple https://www.flickr.com/photos/107465174@N04/15887463047 flickr
28 Dec 2014 @ 1435 Micah Kipple https://www.flickr.com/photos/vambo25/16169556612 flickr
17 Jan 2015 @ 1139 Micah Kipple https://www.flickr.com/photos/bonnerphotographic/16142959918/in/photostream/ Flickr
BaselineDistance (ft)Description
South Side 200Jugwalk south of Grand at the Y junction at Belgian Pool


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