Last Known Eruption
4h 32m ago
Predicted Next Eruption
Today at 0522 ± 105 minutes

Latest Eruptions

EruptionDurationCodeInterval
26 May 2017 @ 2129 ie---6h 18m
26 May 2017 @ 151111m 4s T1Q7h 5m
26 May 2017 @ 080611m 8s G1Q6h 11m
26 May 2017 @ 0155 wc-1-6h 21m
25 May 2017 @ 1934T1Q6h 11m
25 May 2017 @ 13238m 53s T1C6h 27m
25 May 2017 @ 06569m 52s T1C6h 12m
25 May 2017 @ 0044 wc---6h 44m
24 May 2017 @ 180011m 47s G1Q6h 14m
24 May 2017 @ 114610m 31s T2C6h 11m
24 May 2017 @ 0535-2C5h 44m
23 May 2017 @ 2351 ? ie wc---6h 4m
23 May 2017 @ 17479m 5s T1C6h 36m
23 May 2017 @ 11119m 31s G1C6h 44m
23 May 2017 @ 0427 wc---6h 30m
22 May 2017 @ 2157 wc-1-6h 40m
22 May 2017 @ 151711m 16s T2C7h 14m
22 May 2017 @ 080310m 45s D0/G2Q6h 35m
22 May 2017 @ 0128 wc-2-6h 37m
21 May 2017 @ 18519m 54s G1C6h 31m
21 May 2017 @ 122010m 27s D0/G1C14h 10m
20 May 2017 @ 2210 wc---6h 32m
20 May 2017 @ 15389m 17s G1C6h 23m
20 May 2017 @ 09159m 48s T1C6h 39m
20 May 2017 @ 0236 wc---6h 27m
19 May 2017 @ 200911m 20s D0/G2Q6h 17m
19 May 2017 @ 13529m 59s G1C6h 9m
19 May 2017 @ 074310m 2s D2/T1C6h 43m
19 May 2017 @ 0100 wc---7h 12m
18 May 2017 @ 174811m 2 sG1C6h 38m
18 May 2017 @ 1110 wc---12h 41m
17 May 2017 @ 2229 wc---6h 36m
17 May 2017 @ 1553~11m T1Q7h 12m
17 May 2017 @ 0841 wc---6h 25m
17 May 2017 @ 0216 E---6h 1m
16 May 2017 @ 2015 E---6h 23m
16 May 2017 @ 135211m 13s G2C7h 20m
16 May 2017 @ 063211m 50s G1Q6h 40m
15 May 2017 @ 2352 wc---6h 18m
15 May 2017 @ 1734 wc-2-6h 35m
15 May 2017 @ 105912m 4s T2*Q6h 34m
15 May 2017 @ 0425 wc-1-6h 10m
14 May 2017 @ 2215 wc---6h 30m
14 May 2017 @ 154511m 17s T2Q8h 10m
14 May 2017 @ 073511m 13s D2/T1Q6h 27m
14 May 2017 @ 0108 wc-2-6h 51m
13 May 2017 @ 1817 wc---6h 4m
13 May 2017 @ 1213 nsT2Q7h 21m
13 May 2017 @ 0452 wc-1-6h 12m
12 May 2017 @ 2240 wc-1-7h 14m
12 May 2017 @ 152612m 46s T3#Q8h 21m
12 May 2017 @ 070510m 47s T2Q6h 22m
12 May 2017 @ 0043 wc-1-7h 10m
11 May 2017 @ 17339m T1C8h 2m
11 May 2017 @ 093110m 4s G1C6h 23m
11 May 2017 @ 0308 wc-1-7h 48m
10 May 2017 @ 192011m 28s G1Q7h 7m
10 May 2017 @ 12138m 34s G1C8h 2m
10 May 2017 @ 0411 wc-2-6h 2m
09 May 2017 @ 2209 wc-1-6h 50m
09 May 2017 @ 1519~11m G1Q6h 34m
09 May 2017 @ 08459m 38s D4/T1C7h 35m
09 May 2017 @ 0110 wc-2-6h 32m
08 May 2017 @ 1838<10m T1C7h 26m
08 May 2017 @ 111211m 43s T1Q6h 46m
08 May 2017 @ 0426 E---6h 41m
07 May 2017 @ 2145 wc-2-7h 1m
07 May 2017 @ 1444T2C6h 47m
07 May 2017 @ 07578m 38s D3/G1C6h 27m
07 May 2017 @ 0130 wc---5h 57m
06 May 2017 @ 19339m 16s T2C6h 19m
06 May 2017 @ 1314T1Q6h 27m
06 May 2017 @ 06479m 48s G1C6h 0m
06 May 2017 @ 0047 wc-1-5h 44m
05 May 2017 @ 190310m 16s G1C6h 15m
05 May 2017 @ 124811m 18s G1Q6h 24m
05 May 2017 @ 062410m 56s G1C5h 59m
05 May 2017 @ 0025 wc-2-6h 12m
04 May 2017 @ 1813~11m 30s G1Q5h 57m
04 May 2017 @ 121610m 56s D0/G1Q5h 48m
04 May 2017 @ 062810m 13s G2C6h 8m
04 May 2017 @ 0020 wc-2-6h 30m
03 May 2017 @ 17509m 59s G1C5h 56m
03 May 2017 @ 115411m 15s G1C6h 19m
03 May 2017 @ 053510m 36s -1C6h 32m
02 May 2017 @ 2303 wc---5h 48m
02 May 2017 @ 17159m 43s T1C6h 11m
02 May 2017 @ 110410m 4s T1C6h 7m
02 May 2017 @ 0457 wc---6h 7m
01 May 2017 @ 2250 wc-1-6h 27m
01 May 2017 @ 1623 ns~9 1/2 m-1C6h 9m
01 May 2017 @ 101411m 50s D0/G1Q6h 21m
01 May 2017 @ 0353 E---6h 17m
30 Apr 2017 @ 2136 wc---6h 38m
30 Apr 2017 @ 145810m 40s T2Q7h 28m
30 Apr 2017 @ 07309m 48s G1Q6h 30m
30 Apr 2017 @ 0100 wc---6h 12m
29 Apr 2017 @ 1848 wc---6h 2m
29 Apr 2017 @ 124610m 2s D0/G1C6h 10m
29 Apr 2017 @ 0636 wc---6h 49m

Interval Statistics

Interval Count100
Min5h 44m
Max14h 10m
Mean6h 41m
Median6h 27m
Grand-Specific
Start29G/26T (52.73% G)
Max Bursts3
Mean Bursts1.31
Median Bursts1
End34C/24Q (58.62% C)

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4117 23 May 2017 @ 0521 --- SteveO Grand's pool empty, vent & Turban ie
4110 21 May 2017 @ 0618 --- JimS Pool empty and Vent and Turban ie.
4081 11 May 2017 @ 0710 --- JimS Start of overflow from pool at 0710.
4080 10 May 2017 @ 0632 --- JimS First water came into the pool.
4079 10 May 2017 @ 0601 --- JimS Pool empty. Vent and Turban quiet at 0601.
4072 08 May 2017 @ 0635 --- JimS First water came into the pool. Usually occurs 2hrs to 2hrs 10min after the eruption starts.
4071 08 May 2017 @ 0607 --- JimS Pool empty. Vent and Turban quiet.
3965 09 Apr 2017 @ 0726 --- vw Possible Grand eruption, ie. Too foggy to be sure. A video review may clarify.
3957 27 Feb 2017 @ 0740 --- vw Large steam plume. Timing for Grand eruption consistent. Unable to to see water due to steam/fog. Video review may confirm eruption.
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.
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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