Last Known Eruption
6h 52m ago
Predicted Next Eruption
Today at 1526 ± 60 minutes

Latest Eruptions

Eruption DurationCodeInterval
23 Jun 2018 @ 085012m -2*C6h 3m
23 Jun 2018 @ 0247 wc---6h 27m
22 Jun 2018 @ 2020 wc-1-5h 46m
22 Jun 2018 @ 1434 ie wc-1-6h 1m
22 Jun 2018 @ 0833 wc-1-7h 0m
22 Jun 2018 @ 0133 wc-1-6h 2m
21 Jun 2018 @ 1931 wc-2-6h 1m
21 Jun 2018 @ 1330T1C7h 43m
21 Jun 2018 @ 0547 wc---6h 45m
20 Jun 2018 @ 2302 wc-2-6h 41m
20 Jun 2018 @ 1621G2Q6h 57m
20 Jun 2018 @ 092410m 25s G1C6h 26m
20 Jun 2018 @ 0258 wc---6h 23m
19 Jun 2018 @ 2035 wc-1-6h 34m
19 Jun 2018 @ 14019m 37s D0/G2C6h 5m
19 Jun 2018 @ 07569m 35s D0/G1C6h 1m
19 Jun 2018 @ 0155 wc---5h 54m
18 Jun 2018 @ 2001G1C5h 59m
18 Jun 2018 @ 1402G--7h 22m
18 Jun 2018 @ 0640 wc-1-6h 24m
18 Jun 2018 @ 0016 wc---5h 58m
17 Jun 2018 @ 1818~9m G1C6h 59m
17 Jun 2018 @ 111910m 18s D0/G1Q5h 56m
17 Jun 2018 @ 0523 wc-1-6h 58m
16 Jun 2018 @ 2225T1Q6h 35m
16 Jun 2018 @ 155010m 45s T1Q7h 17m
16 Jun 2018 @ 083311m 17s G1Q6h 5m
16 Jun 2018 @ 0228 wc---6h 52m
15 Jun 2018 @ 193610m 43s G1Q6h 19m
15 Jun 2018 @ 131710m 19s G1C6h 24m
15 Jun 2018 @ 065310m 39s D0/T1C6h 7m
15 Jun 2018 @ 0046 wc-1-5h 42m
14 Jun 2018 @ 190410m -1C6h 42m
14 Jun 2018 @ 122210m 57s G1Q6h 13m
14 Jun 2018 @ 06099m 7s T1C6h 36m
13 Jun 2018 @ 2333 wc-1-6h 11m
13 Jun 2018 @ 172210m 20s T1C5h 53m
13 Jun 2018 @ 112910m 10s D2/T2C6h 42m
13 Jun 2018 @ 0447 wc-2-7h 29m
12 Jun 2018 @ 2118 wc-1-6h 23m
12 Jun 2018 @ 145511m 11s G1Q6h 59m
12 Jun 2018 @ 075613m G1Q6h 7m
12 Jun 2018 @ 0149 wc-2-8h 16m
11 Jun 2018 @ 17339m 30s G1C6h 45m
11 Jun 2018 @ 104810m 32s T1Q6h 27m
11 Jun 2018 @ 0421 wc-2-6h 36m
10 Jun 2018 @ 2145 wc-1-7h 9m
10 Jun 2018 @ 1436G2*Q6h 44m
10 Jun 2018 @ 0752G1C6h 42m
10 Jun 2018 @ 0110 wc---6h 5m
09 Jun 2018 @ 1905 ns wc-1-8h 2m
09 Jun 2018 @ 110311m 12s G1Q6h 23m
09 Jun 2018 @ 0440 wc-1-6h 14m
08 Jun 2018 @ 2226 wc---7h 29m
08 Jun 2018 @ 145710m 43s G1Q6h 13m
08 Jun 2018 @ 084410m 17s D0/G2Q6h 0m
08 Jun 2018 @ 0244 wc-1-5h 49m
07 Jun 2018 @ 2055T1C7h 10m
07 Jun 2018 @ 134510m 10s D0/T1Q6h 32m
07 Jun 2018 @ 071312m 18s D0/G1Q6h 8m
07 Jun 2018 @ 0105 wc---5h 58m
06 Jun 2018 @ 19079m 45s T1C7h 21m
06 Jun 2018 @ 114611m 55s D0/T1Q6h 11m
06 Jun 2018 @ 0535 wc---6h 36m
05 Jun 2018 @ 2259 wc---6h 26m
05 Jun 2018 @ 16339m 3s D0/G1C6h 1m
05 Jun 2018 @ 10329m 32s G1C6h 13m
05 Jun 2018 @ 0419 wc-1-6h 51m
04 Jun 2018 @ 2128 wc-1-7h 16m
04 Jun 2018 @ 141210m G1Q6h 28m
04 Jun 2018 @ 0744 wc-1-6h 8m
04 Jun 2018 @ 0136 wc-2-6h 27m
03 Jun 2018 @ 1909 wc-1-6h 17m
03 Jun 2018 @ 125210G1Q6h 15m
03 Jun 2018 @ 0637 wc-1-6h 10m
03 Jun 2018 @ 0027 wc-1-9h 26m
02 Jun 2018 @ 150110m 8s G1C6h 29m
02 Jun 2018 @ 083210m 50s G1Q8h 7m
02 Jun 2018 @ 0025 wc-2-6h 27m
01 Jun 2018 @ 175810m 24s G1Q6h 27m
01 Jun 2018 @ 113110m 31s T1C8h 32m
01 Jun 2018 @ 0259 wc-1-6h 59m
31 May 2018 @ 200011m 45s G1Q6h 25m
31 May 2018 @ 133511m 5s G1C6h 25m
31 May 2018 @ 071011m 6s D0/G1C6h 12m
31 May 2018 @ 0058 wc-1-7h 10m
30 May 2018 @ 174810T1C6h 49m
30 May 2018 @ 105910m 39s T1Q7h 18m
30 May 2018 @ 0341 wc-1-6h 10m
29 May 2018 @ 213112+G1-6h 5m
29 May 2018 @ 152610m 7s G1C7h 9m
29 May 2018 @ 081711m 7s D2/G1Q6h 58m
29 May 2018 @ 0119 wc-2-6h 52m
28 May 2018 @ 1827T2-6h 6m
28 May 2018 @ 122110m 33s T2Q6h 18m
28 May 2018 @ 06039m 50s G1C5h 49m
28 May 2018 @ 0014 wc-1-6h 54m
27 May 2018 @ 1720D0/T2*Q6h 27m
27 May 2018 @ 1053G1Q---6h 0m
27 May 2018 @ 0453 wc---6h 22m

Interval Statistics

Interval Count100
Min5h 42m
Max9h 26m
Mean6h 34m
Median6h 26m
Grand-Specific
Start35G/18T (66.04% G)
Max Bursts2
Mean Bursts1.2
Median Bursts1
EndEqual 26C/26Q

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
8195 15 May 2018 @ 0458 --- JoeN not certian foggy in area not as large as the following daisy ??
7834 21 Nov 2017 @ 0733 --- MikeG "Groblong" cloud downbasin at 7:33ie wc.
7715 16 Oct 2017 @ 0003 --- JoeN looked like Grand at 0003, lasted about 10 minutes, condition very dark, hard to be sure. Right place slightly early.
7712 15 Oct 2017 @ 1827 --- ljmercier Grand had a second burst!
7533 29 Sep 2017 @ 0747 --- JimS Pool empty, Vent and Turban quiet.
6245 09 Sep 2017 @ 1933 --- sfavor waves on grand
5570 02 Sep 2017 @ 0630 --- JimS Empty. Turban and Vent quiet.
5317 25 Aug 2017 @ 0626 --- JimS Pool empt, Vent and Turban ie.
5297 24 Aug 2017 @ 0604 --- JimS Pool empty. Vent and Turban quiet.
5296 23 Aug 2017 @ 2352 --- Jake Vent and Turban ie, Grand empty
4943 18 Aug 2017 @ 0907 --- Brian Overflow started at 9:07
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 --- EmilyW 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 --- EmilyW 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.
EntrySourceLinkComment
31 Jul 2017 @ 1608 JSJ https://www.youtube.com/watch?v=PVKlUye_S8A Time lapse video of Grand Geyser's afternoon eruption on 31 July 2017.
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
BaselineDistance (ft)Description
South Side 200Jugwalk south of Grand at the Y junction at Belgian Pool


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