Last Known Eruption
6h 8m ago
Predicted Next Eruption
Today at 0828 ± 105 minutes

Latest Eruptions

EruptionDurationCodeInterval
27 Jul 2017 @ 0033 wc---6h 15m
26 Jul 2017 @ 1818G2Q7h 0m
26 Jul 2017 @ 111810m 26s T1Q6h 3m
26 Jul 2017 @ 0515 E---6h 33m
25 Jul 2017 @ 224210m 13s G1C5h 57m
25 Jul 2017 @ 16459m 25s G1C5h 57m
25 Jul 2017 @ 104811m 14s DO/G1Q6h 2m
25 Jul 2017 @ 0446 E---12h 13m
24 Jul 2017 @ 163310m 53s T1Q6h 6m
24 Jul 2017 @ 102711m 15s G1Q12h 43m
23 Jul 2017 @ 214411m 46s T1Q6h 11m
23 Jul 2017 @ 15339m40T1C6h 30m
23 Jul 2017 @ 090311m 44s G1Q13h 4m
22 Jul 2017 @ 195911m 3s G1Q5h 49m
22 Jul 2017 @ 14109m 57s G2C6h 12m
22 Jul 2017 @ 07589m 13s G1C13h 6m
21 Jul 2017 @ 1852G1Q5h 50m
21 Jul 2017 @ 130210m 49s G1Q6h 17m
21 Jul 2017 @ 064511m 13s T1C12h 50m
20 Jul 2017 @ 175510m 45s G1C5h 47m
20 Jul 2017 @ 120811m 4s G1Q6h 20m
20 Jul 2017 @ 054810m 42s G1C6h 27m
19 Jul 2017 @ 2321 E---6h 15m
19 Jul 2017 @ 170612m 9s G1Q6h 36m
19 Jul 2017 @ 103010m 38s G2*Q5h 42m
19 Jul 2017 @ 0448 ns---12h 22m
18 Jul 2017 @ 16269m 41s G2C6h 7m
18 Jul 2017 @ 10199m 50s T1C18h 10m
17 Jul 2017 @ 16099m 30s D4/T1C7h 3m
17 Jul 2017 @ 090612m 32s D0/G1Q12h 6m
16 Jul 2017 @ 21009m 29s G1C6h 31m
16 Jul 2017 @ 14299m 52s G3Q6h 49m
16 Jul 2017 @ 07409m54D3/T2*Q6h 28m
16 Jul 2017 @ 0112 E---6h 32m
15 Jul 2017 @ 184012m 1s G1Q6h 2m
15 Jul 2017 @ 12389m 40s G1C6h 35m
15 Jul 2017 @ 060310m 5s T1C12h 58m
14 Jul 2017 @ 170512m 20s D0/G1Q5h 44m
14 Jul 2017 @ 11219m 58s G1C5h 54m
14 Jul 2017 @ 05279m 33s G1C6h 9m
13 Jul 2017 @ 2318 E---5h 49m
13 Jul 2017 @ 1729~9m G1C5h 48m
13 Jul 2017 @ 114110m 26s T2Q6h 50m
13 Jul 2017 @ 0451 E---6h 11m
12 Jul 2017 @ 2240 E---6h 12m
12 Jul 2017 @ 162811m 2s G1Q6h 32m
12 Jul 2017 @ 095611m 4s G1Q6h 6m
12 Jul 2017 @ 0350 E---7h 14m
11 Jul 2017 @ 203614m G1Q6h 5m
11 Jul 2017 @ 143110m 54s G1C5h 57m
11 Jul 2017 @ 08349m 46s G1C6h 38m
11 Jul 2017 @ 0156 E---6h 12m
10 Jul 2017 @ 194411m 24s D0/G1C5h 47m
10 Jul 2017 @ 135710m 29s D1D0/G1C6h 12m
10 Jul 2017 @ 074510m 31s G2Q11h 45m
09 Jul 2017 @ 2000G1C6h 0m
09 Jul 2017 @ 1400G2Q6h 3m
09 Jul 2017 @ 075710m G2C12h 11m
08 Jul 2017 @ 1946D0/G1C5h 36m
08 Jul 2017 @ 14109m 57s D0/G2C5h 43m
08 Jul 2017 @ 08279m 52s G1Q6h 59m
08 Jul 2017 @ 0128 E---6h 17m
07 Jul 2017 @ 191112m 12s T1Q6h 26m
07 Jul 2017 @ 124510m 20s G1C6h 13m
07 Jul 2017 @ 063210m 9s T2C6h 38m
06 Jul 2017 @ 2354 E---6h 11m
06 Jul 2017 @ 1743G2C6h 43m
06 Jul 2017 @ 110011m 33s G2Q6h 33m
06 Jul 2017 @ 042710m 52s G2Q6h 6m
05 Jul 2017 @ 2221 E---6h 34m
05 Jul 2017 @ 154711m 25s D2/G1Q6h 20m
05 Jul 2017 @ 092710m 3s D2/G1C7h 1m
05 Jul 2017 @ 0226 E---7h 7m
04 Jul 2017 @ 191910m 30s G1Q5h 51m
04 Jul 2017 @ 132810m 27s G1C6h 12m
04 Jul 2017 @ 071612m 1s D1/G1Q6h 2m
04 Jul 2017 @ 0114 E---6h 28m
03 Jul 2017 @ 18469m 44s D2/G1Q6h 40m
03 Jul 2017 @ 120611m 14s G1Q6h 39m
03 Jul 2017 @ 052710m 45s G1C6h 31m
02 Jul 2017 @ 2256 E---6h 9m
02 Jul 2017 @ 164711m 32s G1Q7h 2m
02 Jul 2017 @ 094510m 8s G1Q12h 20m
01 Jul 2017 @ 212511m 25s G1Q6h 26m
01 Jul 2017 @ 145910m 14s G1C5h 57m
01 Jul 2017 @ 09029m 48s D3/T2C6h 43m
01 Jul 2017 @ 0219 E---6h 0m
30 Jun 2017 @ 201911m 50s G1Q6h 0m
30 Jun 2017 @ 141910m 0s G1C6h 6m
30 Jun 2017 @ 08139m 58s G1C6h 28m
30 Jun 2017 @ 0145 E---6h 48m
29 Jun 2017 @ 185710m 40s D2/T1Q6h 18m
29 Jun 2017 @ 123911m 5s D0/T2Q6h 6m
29 Jun 2017 @ 06339m 47s G1C6h 34m
28 Jun 2017 @ 2359 E---5h 46m
28 Jun 2017 @ 1813---6h 31m
28 Jun 2017 @ 114210m 56s D2/T2*-6h 23m
28 Jun 2017 @ 0519 ns-2*Q11h 54m
27 Jun 2017 @ 172510m 18s G2C6h 22m
27 Jun 2017 @ 1103G1C5h 43m

Interval Statistics

Interval Count100
Min5h 36m
Max18h 10m
Mean7h 9m
Median6h 20m
Grand-Specific
Start63G/16T (79.75% G)
Max Bursts3
Mean Bursts1.26
Median Bursts1
EndEqual 40C/40Q

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4541 26 Jul 2017 @ 0610 --- AndrewW Pool empty, vent turban quiet, no water visible in pool
4529 25 Jul 2017 @ 0523 --- SteveO Grand'a pool is empty and Vent & Turban are going.
4521 24 Jul 2017 @ 0638 --- JimS Small amount of water in the pool. Probably erupted around 0415.
4516 23 Jul 2017 @ 0656 --- JimS First overflow from the pool at this time.
4502 19 Jul 2017 @ 1500 --- SteveO VC in now predicting Grand 6.5 hours + or - 90 minutes
4480 18 Jul 2017 @ 0536 --- SteveO Grand's pool empty, Vent & Turban quiet.
4429 09 Jul 2017 @ 0757 --- Barbara Lasseter first burst ended at 0806. 2nd burst at 0807 lasted under one minute. G2 C
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.
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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