Last Known Eruption
2h 10m ago
Predicted Next Eruption
Today at 2206 ± 60 minutes

Latest Eruptions

EruptionDurationCodeInterval
16 Aug 2017 @ 153010m 20s D0/G1C6h 1m
16 Aug 2017 @ 092911m 23s D0/G1Q5h 50m
16 Aug 2017 @ 0339 wc-2-6h 10m
15 Aug 2017 @ 2129 wc---6h 12m
15 Aug 2017 @ 151711m 52s G2Q6h 15m
15 Aug 2017 @ 09029m 18s T2*C6h 4m
15 Aug 2017 @ 0258 wc---5h 52m
14 Aug 2017 @ 2106 wc-2-5h 55m
14 Aug 2017 @ 1511T1C6h 20m
14 Aug 2017 @ 0851 wc---5h 22m
14 Aug 2017 @ 0329 ? wc---6h 31m
13 Aug 2017 @ 2058 wc-1-5h 44m
13 Aug 2017 @ 151410m 16s G1C6h 59m
13 Aug 2017 @ 081512m 31s G1Q5h 52m
13 Aug 2017 @ 0223 E---6h 42m
12 Aug 2017 @ 19419m 52s G1C5h 59m
12 Aug 2017 @ 13429m 57s T2C5h 59m
12 Aug 2017 @ 0743G1C6h 10m
12 Aug 2017 @ 0133 wc-1-7h 4m
11 Aug 2017 @ 182913m 43s T1Q5h 52m
11 Aug 2017 @ 123710m 14s G1C6h 45m
11 Aug 2017 @ 0552 wc---6h 41m
10 Aug 2017 @ 2311 wc---6h 0m
10 Aug 2017 @ 1711G1C6h 23m
10 Aug 2017 @ 104811m 4s D0/G1Q5h 51m
10 Aug 2017 @ 0457 wc---6h 3m
09 Aug 2017 @ 2254 wc---6h 56m
09 Aug 2017 @ 1558~11m -1C5h 48m
09 Aug 2017 @ 101010m 30s T1Q6h 7m
09 Aug 2017 @ 0403 wc---6h 22m
08 Aug 2017 @ 2141 wc---6h 16m
08 Aug 2017 @ 152510m 32s G1C6h 26m
08 Aug 2017 @ 085911m 35s G1Q5h 59m
08 Aug 2017 @ 0300 wc---5h 55m
07 Aug 2017 @ 2105 wc-3-6h 48m
07 Aug 2017 @ 141711m 45s G2*Q6h 21m
07 Aug 2017 @ 075612m 8s T2*Q6h 18m
07 Aug 2017 @ 0138 wc---6h 9m
06 Aug 2017 @ 1929 wc---5h 42m
06 Aug 2017 @ 134710m 38s G1Q7h 6m
06 Aug 2017 @ 064110m 45s G2Q5h 59m
06 Aug 2017 @ 004110m 32s G1C5h 53m
05 Aug 2017 @ 18479m 58s G2C5h 46m
05 Aug 2017 @ 130111m 30s G1Q6h 0m
05 Aug 2017 @ 070110m 34s G2C5h 50m
05 Aug 2017 @ 0111G--6h 45m
04 Aug 2017 @ 1826DO/G1Q6h 0m
04 Aug 2017 @ 122611m 30s D0/G1Q5h 47m
04 Aug 2017 @ 063910m 38s G1C6h 0m
04 Aug 2017 @ 003910m 7s T1C5h 50m
03 Aug 2017 @ 1849T1Q6h 32m
03 Aug 2017 @ 121711m 7s G2Q6h 7m
03 Aug 2017 @ 061011m 8s G1C5h 55m
03 Aug 2017 @ 00148m 50s G1C6h 5m
02 Aug 2017 @ 180911m 42s T1Q6h 47m
02 Aug 2017 @ 112211m 7s T1Q6h 1m
02 Aug 2017 @ 0521G1C6h 6m
01 Aug 2017 @ 231410m 7s G1C5h 56m
01 Aug 2017 @ 17188m 24s T1C6h 31m
01 Aug 2017 @ 10479m T1C6h 10m
01 Aug 2017 @ 0437 wc---6h 6m
31 Jul 2017 @ 223110m 33s G1C6h 23m
31 Jul 2017 @ 160811m 52s T1Q6h 23m
31 Jul 2017 @ 094510m 10s D0/G1C5h 48m
31 Jul 2017 @ 0357 wc---5h 41m
30 Jul 2017 @ 22158m 24s T1C6h 27m
30 Jul 2017 @ 154811m 32s 6h 30m
30 Jul 2017 @ 091810m 5s D0/T1C6h 2m
30 Jul 2017 @ 03159m 47s G2C5h 56m
29 Jul 2017 @ 211910m 11s D0/G1C5h 55m
29 Jul 2017 @ 1524T2C5h 44m
29 Jul 2017 @ 09409m 51s T1C5h 48m
29 Jul 2017 @ 03519m 24s 6h 28m
28 Jul 2017 @ 212310m 44s G1C6h 37m
28 Jul 2017 @ 14469m 56s G1Q6h 13m
28 Jul 2017 @ 083311m 14s T1Q6h 18m
28 Jul 2017 @ 0215 wc---6h 51m
27 Jul 2017 @ 1924G2Q6h 37m
27 Jul 2017 @ 124711m 2s T2Q6h 5m
27 Jul 2017 @ 06429m 43s G1C6h 9m
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 T1C6h 42m
21 Jul 2017 @ 0003 E---6h 8m

Interval Statistics

Interval Count100
Min5h 22m
Max13h 6m
Mean6h 27m
Median6h 7m
Grand-Specific
Start49G/24T (67.12% G)
Max Bursts3
Mean Bursts1.24
Median Bursts1
End39C/34Q (53.42% C)

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4888 14 Aug 2017 @ 0655 --- JimS Pool below overflow.
4869 10 Aug 2017 @ 0619 --- JimS No water in the pool yet.
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.
EntrySourceLinkComment
31 Jul 2017 @ 1608 JSJ https://www.flickr.com/photos/jsjgeology/35790098193 Photo (out of 6) of Grand Geyser's 4:08 to 4:20 PM eruption on 31 July 2017.
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
BaselineDistance (ft)Description
South Side 200Jugwalk south of Grand at the Y junction at Belgian Pool


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