Last Known Eruption
1h 6m ago
Predicted Next Eruption
Jun 23 at 0231 ± 105 minutes

Latest Eruptions

EruptionDurationCodeInterval
22 Jun 2017 @ 1836 ns---6h 51m
22 Jun 2017 @ 114511m 26s G1Q6h 36m
22 Jun 2017 @ 0509---6h 42m
21 Jun 2017 @ 2227 wc-1-6h 10m
21 Jun 2017 @ 161711m D0/G1C6h 11m
21 Jun 2017 @ 100611m 16s G1Q6h 37m
21 Jun 2017 @ 0329 wc-2-6h 32m
20 Jun 2017 @ 2057 wc-1-5h 57m
20 Jun 2017 @ 1500G2C5h 54m
20 Jun 2017 @ 09069m 51s G2C6h 48m
20 Jun 2017 @ 0218 wc-2-7h 46m
19 Jun 2017 @ 1832G1Q6h 16m
19 Jun 2017 @ 1216T1Q6h 33m
19 Jun 2017 @ 0543 wc-1-6h 31m
18 Jun 2017 @ 2312 wc-1-6h 14m
18 Jun 2017 @ 165811m 3s G1Q6h 23m
18 Jun 2017 @ 103510m 11s G1C6h 30m
18 Jun 2017 @ 0405 wc-2-6h 5m
17 Jun 2017 @ 2200 wc-1-6h 19m
17 Jun 2017 @ 154111m 21s G1C6h 44m
17 Jun 2017 @ 085710m 28s D0/G1C6h 45m
17 Jun 2017 @ 0212 wc---6h 6m
16 Jun 2017 @ 200612m G1Q6h 18m
16 Jun 2017 @ 1348D1/T1Q6h 19m
16 Jun 2017 @ 0729G2C6h 10m
16 Jun 2017 @ 0119 E---6h 24m
15 Jun 2017 @ 1855G1C6h 36m
15 Jun 2017 @ 1219G2-6h 11m
15 Jun 2017 @ 0608 wc---6h 40m
14 Jun 2017 @ 2328 ? wc---6h 45m
14 Jun 2017 @ 164310m 17s G2Q6h 41m
14 Jun 2017 @ 1002~11m G1Q6h 55m
14 Jun 2017 @ 0307 wc-1-6h 33m
13 Jun 2017 @ 2034 wc---6h 36m
13 Jun 2017 @ 135811m G1Q6h 13m
13 Jun 2017 @ 074511m 15s T2Q5h 58m
13 Jun 2017 @ 0147 wc---5h 58m
12 Jun 2017 @ 1949 wc---6h 11m
12 Jun 2017 @ 13389m 25s G2C6h 2m
12 Jun 2017 @ 0736 wc-1-6h 53m
12 Jun 2017 @ 0043 wc-2-6h 0m
11 Jun 2017 @ 1843G1C6h 12m
11 Jun 2017 @ 123111m 17s G1Q6h 34m
11 Jun 2017 @ 055710m 24s G1C6h 22m
10 Jun 2017 @ 2335 ie wc---6h 43m
10 Jun 2017 @ 1652 wc-1-6h 44m
10 Jun 2017 @ 100810m 11s T1Q6h 40m
10 Jun 2017 @ 0328 wc-1-6h 25m
09 Jun 2017 @ 2103 wc-1-6h 2m
09 Jun 2017 @ 15019m 45s G1C5h 54m
09 Jun 2017 @ 09079m 30s G1C6h 19m
09 Jun 2017 @ 0248 wc---6h 0m
08 Jun 2017 @ 2048 wc-1-5h 52m
08 Jun 2017 @ 14569m 40s G1C6h 26m
08 Jun 2017 @ 083010m 56s G1C6h 7m
08 Jun 2017 @ 0223 wc-1-6h 45m
07 Jun 2017 @ 193812m 15s G1Q7h 44m
07 Jun 2017 @ 1154T2Q6h 19m
07 Jun 2017 @ 0535 wc-1-6h 48m
06 Jun 2017 @ 2247 wc-1-6h 29m
06 Jun 2017 @ 1618G1Q7h 17m
06 Jun 2017 @ 090113m 26s G1Q6h 44m
06 Jun 2017 @ 0217 wc-1-6h 36m
05 Jun 2017 @ 1941---6h 40m
05 Jun 2017 @ 130111m 15s G1Q6h 24m
05 Jun 2017 @ 063710m 5s T1C7h 1m
04 Jun 2017 @ 2336 wc-1-7h 18m
04 Jun 2017 @ 161813G1C6h 11m
04 Jun 2017 @ 100711m 23s G2Q6h 29m
04 Jun 2017 @ 0338 wc---6h 9m
03 Jun 2017 @ 2129---6h 40m
03 Jun 2017 @ 144910m 50s G2C6h 38m
03 Jun 2017 @ 081111m 44s T1Q7h 14m
03 Jun 2017 @ 0057 wc-2-7h 43m
02 Jun 2017 @ 1714T1C6h 58m
02 Jun 2017 @ 101610m 13s T2*C7h 56m
02 Jun 2017 @ 0220 wc-1-6h 26m
01 Jun 2017 @ 1954 wc-1-6h 9m
01 Jun 2017 @ 13459m 56s D0/G3C6h 29m
01 Jun 2017 @ 071612m 7s D1/G2*Q6h 21m
01 Jun 2017 @ 0055 wc---6h 2m
31 May 2017 @ 185310m 15s D0/G1C6h 19m
31 May 2017 @ 123411m 4s D0/G1C6h 11m
31 May 2017 @ 062310m 19s T2Q6h 23m
31 May 2017 @ 0000 wc-1-6h 35m
30 May 2017 @ 172510m 46s T2Q6h 24m
30 May 2017 @ 110110m 43s T1Q6h 17m
30 May 2017 @ 0444 wc-1-7h 16m
29 May 2017 @ 2128 wc-1-6h 41m
29 May 2017 @ 144713m 7s D0/G1Q6h 20m
29 May 2017 @ 082710m 4s G1C6h 49m
29 May 2017 @ 0138 ? ie wc---6h 39m
28 May 2017 @ 185911m 51s D0/G1Q6h 22m
28 May 2017 @ 123710m 40s T1Q6h 21m
28 May 2017 @ 06159m 43s G1Q6h 48m
27 May 2017 @ 2327 wc-1-6h 29m
27 May 2017 @ 165810m 28s G1Q6h 31m
27 May 2017 @ 10279m 15s D0/G1C6h 21m
27 May 2017 @ 0406 E---6h 37m
26 May 2017 @ 2129 ie---6h 18m

Interval Statistics

Interval Count100
Min5h 52m
Max7h 56m
Mean6h 30m
Median6h 29m
Grand-Specific
Start43G/14T (75.44% G)
Max Bursts3
Mean Bursts1.25
Median Bursts1
End31Q/25C (55.36% Q)

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4317 15 Jun 2017 @ 0634 --- B**2 Definitely post-eruption. Turban & Vent sill going.
4280 09 Jun 2017 @ 0701 --- JimS Start of overflow from pool.
4279 09 Jun 2017 @ 0624 --- JimS Plenty of water in the pool. Probably erupted about 0300.
4199 04 Jun 2017 @ 0601 --- JimS Pool empty. Vent and Turban quiet.
4135 27 May 2017 @ 0448 --- Betty probably ie, but very foggy downbasin, and streaming is very choppy, so I donĀ“t dare to call it an eruption
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.
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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