Last Known Eruption
3h 18m ago
Predicted Next Eruption
Feb 27 at 0202 ± 105 minutes

Latest Eruptions

EruptionDurationCodeInterval
26 Feb 2017 @ 1807T1Q7h 11m
26 Feb 2017 @ 1056 wc-1-9h 32m
26 Feb 2017 @ 0124 wc---7h 35m
25 Feb 2017 @ 1749G2C8h 54m
25 Feb 2017 @ 0855 E---6h 49m
25 Feb 2017 @ 0206 wc---6h 41m
24 Feb 2017 @ 1925 wc---6h 32m
24 Feb 2017 @ 1253 wc-2-6h 52m
24 Feb 2017 @ 0601 wc---6h 32m
23 Feb 2017 @ 2329 wc---6h 21m
23 Feb 2017 @ 1708 wc-2-7h 2m
23 Feb 2017 @ 1006 wc-1-20h 31m
22 Feb 2017 @ 1335 wc-1-6h 25m
22 Feb 2017 @ 0710 wc---7h 48m
21 Feb 2017 @ 2322 wc---6h 59m
21 Feb 2017 @ 1623G2Q7h 47m
21 Feb 2017 @ 0836 wc---20h 55m
20 Feb 2017 @ 114110m 7s T1C6h 43m
20 Feb 2017 @ 0458 wc---6h 29m
19 Feb 2017 @ 2229 wc---9h 6m
19 Feb 2017 @ 132310m 2s G2Q7h 18m
19 Feb 2017 @ 0605 E---6h 43m
18 Feb 2017 @ 2322 E---7h 12m
18 Feb 2017 @ 161011m 15s G1C6h 25m
18 Feb 2017 @ 0945-1C7h 3m
18 Feb 2017 @ 0242 E---6h 39m
17 Feb 2017 @ 2003 wc---6h 39m
17 Feb 2017 @ 1324 wc-2-6h 14m
17 Feb 2017 @ 0710 wc---6h 2m
17 Feb 2017 @ 0108 wc---14h 35m
16 Feb 2017 @ 1033 wc-1-6h 27m
16 Feb 2017 @ 0406 wc---6h 53m
15 Feb 2017 @ 2113 wc---6h 37m
15 Feb 2017 @ 1436G1C6h 40m
15 Feb 2017 @ 0756 wc---6h 47m
15 Feb 2017 @ 0109 wc---6h 54m
14 Feb 2017 @ 1815 wc---7h 40m
14 Feb 2017 @ 1035 wc---7h 16m
14 Feb 2017 @ 0319 wc---7h 16m
13 Feb 2017 @ 2003 wc---9h 3m
13 Feb 2017 @ 1100 ns wc---7h 12m
13 Feb 2017 @ 0348 wc---6h 47m
12 Feb 2017 @ 2101 wc-2-6h 13m
12 Feb 2017 @ 1448 wc-2-7h 29m
12 Feb 2017 @ 0719 E---7h 22m
11 Feb 2017 @ 2357 wc---6h 48m
11 Feb 2017 @ 1709 wc---8h 25m
11 Feb 2017 @ 0844 ie wc-2-6h 27m
11 Feb 2017 @ 0217 wc---20h 6m
10 Feb 2017 @ 0611 wc---6h 31m
09 Feb 2017 @ 2340 wc---6h 14m
09 Feb 2017 @ 1726 wc-1-7h 8m
09 Feb 2017 @ 1018 wc---6h 37m
09 Feb 2017 @ 0341 wc---6h 51m
08 Feb 2017 @ 2050 wc---6h 47m
08 Feb 2017 @ 1403 wc-1-6h 26m
08 Feb 2017 @ 0737 wc-2-7h 58m
07 Feb 2017 @ 2339 wc-1-7h 11m
07 Feb 2017 @ 1628 wc---12h 37m
07 Feb 2017 @ 0351 wc---14h 36m
06 Feb 2017 @ 1315 wc---7h 35m
06 Feb 2017 @ 0540 E---6h 12m
05 Feb 2017 @ 2328 E---5h 58m
05 Feb 2017 @ 1730 ie wc---8h 55m
05 Feb 2017 @ 0835 wc---7h 21m
05 Feb 2017 @ 0114 wc---14h 27m
04 Feb 2017 @ 1047 wc---6h 52m
04 Feb 2017 @ 0355 ? wc---1d 10h 25m
02 Feb 2017 @ 1730 ? ie wc---8h 0m
02 Feb 2017 @ 0930 wc---6h 34m
02 Feb 2017 @ 0256 wc---8h 38m
01 Feb 2017 @ 1818 wc---6h 27m
01 Feb 2017 @ 1151 wc---7h 42m
01 Feb 2017 @ 0409 wc---6h 25m
31 Jan 2017 @ 2144 E---6h 26m
31 Jan 2017 @ 1518 wc---6h 32m
31 Jan 2017 @ 0846 wc-1-7h 53m
31 Jan 2017 @ 0053 E---6h 39m
30 Jan 2017 @ 1814 wc---8h 21m
30 Jan 2017 @ 0953 wc---6h 51m
30 Jan 2017 @ 0302 wc---6h 41m
29 Jan 2017 @ 2021 wc---6h 13m
29 Jan 2017 @ 1408 wc---6h 57m
29 Jan 2017 @ 0711 E---7h 46m
28 Jan 2017 @ 2325 E---8h 57m
28 Jan 2017 @ 1428 wc-1-8h 19m
28 Jan 2017 @ 0609 E---9h 34m
27 Jan 2017 @ 2035 E---6h 32m
27 Jan 2017 @ 140310m 35s G1Q8h 3m
27 Jan 2017 @ 0600 A---9h 51m
26 Jan 2017 @ 2009 ? wc---9h 54m
26 Jan 2017 @ 10159m 45s T2C8h 31m
26 Jan 2017 @ 0144 wc---7h 32m
25 Jan 2017 @ 1812 wc-2-7h 38m
25 Jan 2017 @ 1034 wc---6h 33m
25 Jan 2017 @ 0401 wc---6h 55m
24 Jan 2017 @ 2106 wc---6h 12m
24 Jan 2017 @ 1454T1C7h 24m
24 Jan 2017 @ 0730 wc---8h 23m
23 Jan 2017 @ 2307 wc---8h 21m

Interval Statistics

Interval Count100
Min5h 58m
Max1d 10h 25m
Mean8h 11m
Median7h 2m
Grand-Specific
Start6G/5T (54.55% G)
Max Bursts2
Mean Bursts1.45
Median Bursts1
End8C/4Q (66.67% C)

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
3955 20 Feb 2017 @ 0831 --- WillBoekel has not reached overflow yet
3954 19 Feb 2017 @ 1030 --- WillBoekel entered overflow in the last hour
3947 15 Feb 2017 @ 0758 --- vw Very large steam plume in Grand area. Unable to verify as Grand due to ground fog, but size and duration suggest Grand eruption.
3945 10 Feb 2017 @ 0622 --- novakg Possible Grand eruption. Very difficult to tell on webcam.
3935 29 Jan 2017 @ 0721 --- Graham Empty. Turban and Vent ie
3933 28 Jan 2017 @ 0737 --- Graham Empty gurgling and steaming
3932 27 Jan 2017 @ 0740 --- Graham Empty and quiet
3917 23 Jan 2017 @ 0720 --- Graham Post eruptive
3916 23 Jan 2017 @ 0656 --- vw Very large steam plum when I opened window. Too dark and steamy to see clearly. Video review would be helpful.
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.
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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