Last Known Eruption
53m ago
Predicted Next Eruption
Today at 2225 ± 60 minutes

Latest Eruptions

Eruption DurationCodeInterval
10 Dec 2018 @ 1549 wc-2-1d 42m
09 Dec 2018 @ 1507 wc---5h 39m
09 Dec 2018 @ 0928 wc---6h 10m
09 Dec 2018 @ 0318 wc---6h 1m
08 Dec 2018 @ 2117 wc-2-6h 13m
08 Dec 2018 @ 1504 wc~9m 55s -1-5h 58m
08 Dec 2018 @ 0906 wc-2-5h 54m
08 Dec 2018 @ 0312 wc---6h 15m
07 Dec 2018 @ 2057 wc---6h 16m
07 Dec 2018 @ 1441 wc~11m 15s -1-5h 30m
07 Dec 2018 @ 0911 wc---5h 42m
07 Dec 2018 @ 0329 wc---5h 46m
06 Dec 2018 @ 2143 wc---6h 9m
06 Dec 2018 @ 1534 ie wc-2*-23h 45m
05 Dec 2018 @ 1549 wc---5h 52m
05 Dec 2018 @ 0957 ie wc---6h 18m
05 Dec 2018 @ 0339 ? ie wc---5h 42m
04 Dec 2018 @ 2157 ie wc---5h 56m
04 Dec 2018 @ 1601 wc-1-5h 59m
04 Dec 2018 @ 1002 ie wc---5h 59m
04 Dec 2018 @ 0403 wc---6h 4m
03 Dec 2018 @ 2159 wc---6h 15m
03 Dec 2018 @ 1544 wc---11h 56m
03 Dec 2018 @ 0348 wc---6h 14m
02 Dec 2018 @ 2134 wc---6h 5m
02 Dec 2018 @ 1529 wc-1-5h 56m
02 Dec 2018 @ 0933 wc---6h 39m
02 Dec 2018 @ 0254 ie wc---5h 34m
01 Dec 2018 @ 2120 wc---6h 11m
01 Dec 2018 @ 1509 wc---5h 51m
01 Dec 2018 @ 0918 wc---5h 46m
01 Dec 2018 @ 0332 wc---11h 5m
30 Nov 2018 @ 1627 wc---11h 26m
30 Nov 2018 @ 0501 wc---5h 54m
29 Nov 2018 @ 2307 A---6h 0m
29 Nov 2018 @ 1707 wc---5h 26m
29 Nov 2018 @ 1141 ie wc---5h 59m
29 Nov 2018 @ 0542 wc-2-5h 30m
29 Nov 2018 @ 0012 wc---5h 54m
28 Nov 2018 @ 1818 wc-1-5h 33m
28 Nov 2018 @ 1245 wc-1-6h 22m
28 Nov 2018 @ 0623 wc---5h 46m
28 Nov 2018 @ 0037 wc---5h 36m
27 Nov 2018 @ 1901 wc---5h 37m
27 Nov 2018 @ 1324 wc---5h 31m
27 Nov 2018 @ 0753 wc---11h 56m
26 Nov 2018 @ 1957 wc---5h 49m
26 Nov 2018 @ 1408 wc-1-17h 15m
25 Nov 2018 @ 2053 ie wc---5h 48m
25 Nov 2018 @ 1505 wc---12h 0m
25 Nov 2018 @ 0305 wc---6h 16m
24 Nov 2018 @ 2049 wc---5h 45m
24 Nov 2018 @ 1504 wc---5h 30m
24 Nov 2018 @ 0934 wc---22h 12m
23 Nov 2018 @ 1122 ie wc---5h 43m
23 Nov 2018 @ 0539 wc---5h 57m
22 Nov 2018 @ 2342 wc---5h 38m
22 Nov 2018 @ 1804 wc---5h 37m
22 Nov 2018 @ 1227 wc---5h 27m
22 Nov 2018 @ 0700 wc-2-5h 35m
22 Nov 2018 @ 0125 wc---5h 26m
21 Nov 2018 @ 1959 wc---6h 0m
21 Nov 2018 @ 1359 ie wc-1-5h 44m
21 Nov 2018 @ 0815 ns wc---6h 14m
21 Nov 2018 @ 0201 wc---6h 9m
20 Nov 2018 @ 1952 wc---5h 48m
20 Nov 2018 @ 1404 wc-2-5h 44m
20 Nov 2018 @ 0820 ie wc-2*-5h 54m
20 Nov 2018 @ 0226 wc---5h 46m
19 Nov 2018 @ 2040 wc-1-5h 53m
19 Nov 2018 @ 1447 wc-1-11h 38m
19 Nov 2018 @ 0309 wc---5h 40m
18 Nov 2018 @ 2129 wc-1-5h 50m
18 Nov 2018 @ 1539 wc-1-5h 30m
18 Nov 2018 @ 1009 wc---12h 1m
17 Nov 2018 @ 2208 wc---5h 14m
17 Nov 2018 @ 1654 wc---5h 28m
17 Nov 2018 @ 1126 ie wc-2-6h 4m
17 Nov 2018 @ 0522 wc---5h 34m
16 Nov 2018 @ 2348 wc---5h 26m
16 Nov 2018 @ 1822 wc---5h 32m
16 Nov 2018 @ 1250 ie wc---5h 29m
16 Nov 2018 @ 0721 ie wc---5h 27m
16 Nov 2018 @ 0154 wc---5h 30m
15 Nov 2018 @ 2024 wc---6h 7m
15 Nov 2018 @ 1417 ie wc-1-5h 47m
15 Nov 2018 @ 0830 wc---6h 23m
15 Nov 2018 @ 0207 wc---6h 7m
14 Nov 2018 @ 2000 wc---5h 52m
14 Nov 2018 @ 1408 ie wc-1-10h 47m
14 Nov 2018 @ 0321 ns wc---6h 3m
13 Nov 2018 @ 2118 wc---7h 18m
13 Nov 2018 @ 1400 ie wc-1-5h 44m
13 Nov 2018 @ 0816 wc---5h 53m
13 Nov 2018 @ 0223 wc---5h 47m
12 Nov 2018 @ 2036 wc---11h 33m
12 Nov 2018 @ 0903 wc-2-17h 39m
11 Nov 2018 @ 1524 wc---5h 30m
11 Nov 2018 @ 0954 wc---11h 34m
10 Nov 2018 @ 2220 wc---5h 43m

Interval Statistics

Interval Count100
Min5h 14m
Max1d 42m
Mean7h 11m
Median5h 54m
Grand-Specific
StartEqual 0G/0T
Max Bursts2
Mean Bursts1.38
Median Bursts1
EndEqual 0C/0Q

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10736 12 Nov 2018 @ 1439 --- Betty Possible Grand eruption, which was missed on streaming cam. I could see steam out of Grand direction on the daylight capture around this time in the upper left frame.
10702 02 Nov 2018 @ 1106 --- steve Pool now filling quickly
10701 02 Nov 2018 @ 1055 --- steve At 1055 the pool of Grand is still empty
10024 04 Sep 2018 @ 1355 --- SteveO Reached 1st overflow.
9167 13 Jul 2018 @ 0054 --- DaveM Somehow Heinrich's entry for Grand merged with mine. Hopefully Heinrich will post his much more complete entry again.
7834 21 Nov 2017 @ 0733 --- MikeG "Groblong" cloud downbasin at 7:33ie wc.
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.
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.
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.
3955 20 Feb 2017 @ 0831 --- WillBoekel has not reached overflow yet
3954 19 Feb 2017 @ 1030 --- WillBoekel entered overflow in the last hour
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.
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.
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.
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.
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.
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.
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.
EntrySourceLinkComment
07 Jun 2018 @ 0713 JSJ https://www.flickr.com/photos/jsjgeology/41267057880 Photo (out of 3) of Grand Geyser's 7:13 to 7:25 AM eruption on 7 June 2018.
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
BaselineDistance (ft)Description
South Side 200Jugwalk south of Grand at the Y junction at Belgian Pool


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