Last Known Eruption
2m ago
Predicted Next Eruption
Today at 1305 ± 60 minutes

Latest Eruptions

Eruption DurationCodeInterval
20 Jul 2018 @ 0629 wc---6h 13m
20 Jul 2018 @ 0015:4611m 49s G1Q6h 8m 35s
19 Jul 2018 @ 1807:1110m 19s G1Q6h 33m 17s
19 Jul 2018 @ 1133:5411m 37s G1Q6h 8m
19 Jul 2018 @ 0525 wc---6h 2m
18 Jul 2018 @ 2323 wc-2-5h 59m
18 Jul 2018 @ 1724 wc---5h 50m
18 Jul 2018 @ 1134 wc-2-6h 12m
18 Jul 2018 @ 0522 wc---6h 30m
17 Jul 2018 @ 2252 wc-1-7h 22m
17 Jul 2018 @ 1530---6h 33m
17 Jul 2018 @ 0857 wc-1-5h 41m
17 Jul 2018 @ 0316 wc---5h 43m
16 Jul 2018 @ 2133 wc-2-6h 8m
16 Jul 2018 @ 152511m 2s T2Q7h 39m
16 Jul 2018 @ 0745:0710m 21s G1C6h 36m
16 Jul 2018 @ 0109 wc---6h 23m
15 Jul 2018 @ 1845:4910m 47s G2*C6h 33m 3s
15 Jul 2018 @ 1212:4610m 30s G1Q6h 8m
15 Jul 2018 @ 0604G2Q6h 44m
14 Jul 2018 @ 2320 wc---6h 17m
14 Jul 2018 @ 1702:2812m 6s G1Q6h 47m
14 Jul 2018 @ 101512m 0s D0/G2*Q5h 53m
14 Jul 2018 @ 0422 wc---7h 23m
13 Jul 2018 @ 2058:4411m 29s G1Q6h 11m 53s
13 Jul 2018 @ 1446:5111m 42s G1Q7h 17m 23s
13 Jul 2018 @ 0729:2810m 36s D0/T1Q6h 35m
13 Jul 2018 @ 0054 wc-1-5h 59m
12 Jul 2018 @ 1855T1C6h 0m
12 Jul 2018 @ 12559m 49s T1C7h 30m
12 Jul 2018 @ 0525-1C7h 59m
11 Jul 2018 @ 2125:4412m 14s G1Q6h 18m 53s
11 Jul 2018 @ 1506:5110m 59s G1Q6h 14m 39s
11 Jul 2018 @ 0852:1210m 51s G2Q6h 14m
11 Jul 2018 @ 0238 wc---6h 11m
10 Jul 2018 @ 2026:3911m 23s G2Q6h 44m 4s
10 Jul 2018 @ 1342:3511m 55s G1Q5h 57m
10 Jul 2018 @ 074510m 37s D2/G1C7h 21m
10 Jul 2018 @ 0023:0912m 34s -2*Q6h 2m 3s
09 Jul 2018 @ 1821:068m 57s T1C6h 24m
09 Jul 2018 @ 1157G1Q6h 0m
09 Jul 2018 @ 05578m 53s T1C7h 2m
08 Jul 2018 @ 2254:2811m 22s D2/T2Q7h 22m 31s
08 Jul 2018 @ 1531:5711m 59s 6h 22m 18s
08 Jul 2018 @ 0909:3910m 31s T1C6h 24m
08 Jul 2018 @ 0245 wc-2-6h 10m
07 Jul 2018 @ 2034:0311m 10s G1C5h 53m
07 Jul 2018 @ 14418m 59s G1C6h 7m
07 Jul 2018 @ 083411m 55s G2*Q6h 8m
07 Jul 2018 @ 0226 wc-2-6h 56m
06 Jul 2018 @ 193010m 52s G1Q6h 35m
06 Jul 2018 @ 1255G1-6h 46m
06 Jul 2018 @ 060910m 10s G1Q6h 2m
06 Jul 2018 @ 0007 wc-1-6h 53m
05 Jul 2018 @ 1714T1C6h 19m
05 Jul 2018 @ 10559m 44s G1C6h 40m
05 Jul 2018 @ 0415 wc---6h 43m
04 Jul 2018 @ 2132G1C6h 20m
04 Jul 2018 @ 151210m 56s G1Q6h 22m
04 Jul 2018 @ 0850G1Q6h 40m
04 Jul 2018 @ 0210 wc-1-6h 37m
03 Jul 2018 @ 193310m 47s G1Q6h 52m
03 Jul 2018 @ 124111m 1s G2Q6h 27m
03 Jul 2018 @ 061411m 3s G2Q6h 22m
02 Jul 2018 @ 2352 wc-2-6h 19m
02 Jul 2018 @ 173312m 4s G1Q6h 18m
02 Jul 2018 @ 111510m 30s G1C6h 35m
02 Jul 2018 @ 0440 wc-1-6h 11m
01 Jul 2018 @ 2229 wc-1-6h 52m
01 Jul 2018 @ 153711m 45s G2Q6h 2m
01 Jul 2018 @ 09359m 57s G1C6h 23m
01 Jul 2018 @ 0312 wc±11m08s---6h 46m
30 Jun 2018 @ 2026---5h 53m
30 Jun 2018 @ 143310m 41s G2Q6h 14m
30 Jun 2018 @ 081910m 36s G1Q6h 33m
30 Jun 2018 @ 0146 wc-1-6h 21m
29 Jun 2018 @ 192510m 50s T1Q6h 31m
29 Jun 2018 @ 1254 wc-1-6h 37m
29 Jun 2018 @ 0617 wc-1-7h 52m
28 Jun 2018 @ 2225 wc-2-6h 19m
28 Jun 2018 @ 160610m 8s G1C6h 18m
28 Jun 2018 @ 094810m D1/G2Q6h 23m
28 Jun 2018 @ 0325 wc-1-6h 9m
27 Jun 2018 @ 2116 wc-1-6h 24m
27 Jun 2018 @ 145210m 6s T2C6h 2m
27 Jun 2018 @ 085010m 19s G2C6h 2m
27 Jun 2018 @ 0248 wc-1-6h 25m
26 Jun 2018 @ 2023G1Q7h 6m
26 Jun 2018 @ 131712m 3s G1Q6h 1m
26 Jun 2018 @ 071610m 40s D0/T2Q6h 28m
26 Jun 2018 @ 0048 wc---5h 55m
25 Jun 2018 @ 1853G--6h 14m
25 Jun 2018 @ 123910m 58s D0/G2Q5h 49m
25 Jun 2018 @ 0650T1C6h 24m
25 Jun 2018 @ 0026 wc-1-5h 44m
24 Jun 2018 @ 1842G1C6h 29m
24 Jun 2018 @ 121311m 53s D0/G1Q5h 44m
24 Jun 2018 @ 0629 wc-1-7h 20m
23 Jun 2018 @ 2309 wc---7h 10m
23 Jun 2018 @ 1559 wc-1-7h 9m

Interval Statistics

Interval Count100
Min5h 41m
Max7h 59m
Mean6h 27m
Median6h 22m
Grand-Specific
Start46G/13T (77.97% G)
Max Bursts2
Mean Bursts1.31
Median Bursts1
End38Q/22C (63.33% Q)

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
8993 02 Jul 2018 @ 1330 --- Betty Waves
8992 02 Jul 2018 @ 1322 --- Betty Waves
8991 02 Jul 2018 @ 1318 --- Betty Waves
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 don´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
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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