Last Known Eruption
9h 5m ago

Latest Eruptions

Eruption DurationCodeInterval
23 Jan 2020 @ 160513m 26s G2*Q5h 57m
23 Jan 2020 @ 100810m 26s D4/T1C7h 2m
23 Jan 2020 @ 0306 wc---6h 3m
22 Jan 2020 @ 2103 wc---6h 15m
22 Jan 2020 @ 144811m 31s G1Q6h 6m
22 Jan 2020 @ 084211m T1Q5h 57m
22 Jan 2020 @ 0245 E---6h 34m
21 Jan 2020 @ 2011 E---5h 31m
21 Jan 2020 @ 14409m 10s G1C6h 16m
21 Jan 2020 @ 082410m 41s T1Q6h 19m
21 Jan 2020 @ 0205 E---6h 7m
20 Jan 2020 @ 1958 E---6h 1m
20 Jan 2020 @ 135710m 25s D0/T1Q5h 50m
20 Jan 2020 @ 08079m 54s G1C7h 22m
20 Jan 2020 @ 0045 E---6h 6m
19 Jan 2020 @ 1839 E---6h 20m
19 Jan 2020 @ 121910m 13s G2Q7h 17m
19 Jan 2020 @ 0502 ie wc---6h 5m
18 Jan 2020 @ 2257 ie wc---6h 35m
18 Jan 2020 @ 1622 ie wc---6h 11m
18 Jan 2020 @ 1011 wc---6h 2m
18 Jan 2020 @ 0409 ie wc---6h 18m
17 Jan 2020 @ 2151 E---5h 58m
17 Jan 2020 @ 1553 wc---6h 11m
17 Jan 2020 @ 0942 E---6h 25m
17 Jan 2020 @ 0317 wc---6h 1m
16 Jan 2020 @ 2116 E---7h 4m
16 Jan 2020 @ 1412 wc-2-7h 57m
16 Jan 2020 @ 0615 E---6h 27m
15 Jan 2020 @ 2348 E---6h 59m
15 Jan 2020 @ 1649 E---5h 0m
15 Jan 2020 @ 1149 wc-2-6h 49m
15 Jan 2020 @ 0500 wc-2-6h 3m
14 Jan 2020 @ 2257 ie wc---6h 24m
14 Jan 2020 @ 1633 ie wc---6h 22m
14 Jan 2020 @ 1011 ie---7h 19m
14 Jan 2020 @ 0252 E---5h 12m
13 Jan 2020 @ 2140 ie wc---5h 56m
13 Jan 2020 @ 1544 wc---6h 10m
13 Jan 2020 @ 0934 E---7h 7m
13 Jan 2020 @ 0227 E---5h 53m
12 Jan 2020 @ 2034 E---5h 15m
12 Jan 2020 @ 1519 E---6h 13m
12 Jan 2020 @ 0906 E---7h 1m
12 Jan 2020 @ 0205 ie wc---6h 20m
11 Jan 2020 @ 1945 wc---6h 18m
11 Jan 2020 @ 1327 ie wc---5h 43m
11 Jan 2020 @ 0744 wc---6h 24m
11 Jan 2020 @ 0120 E---5h 58m
10 Jan 2020 @ 1922 wc---6h 28m
10 Jan 2020 @ 1254 ns wc-1-7h 43m
10 Jan 2020 @ 0511 wc---7h 6m
09 Jan 2020 @ 2205 wc---5h 55m
09 Jan 2020 @ 1610 E---5h 42m
09 Jan 2020 @ 1028 wc---6h 8m
09 Jan 2020 @ 0420 ie wc---18h 19m
08 Jan 2020 @ 1001 ie---6h 3m
08 Jan 2020 @ 0358 wc---6h 11m
07 Jan 2020 @ 2147 wc---5h 49m
07 Jan 2020 @ 1557:3012m 45s G1Q6h 13m 6s
07 Jan 2020 @ 0944:249m 48s G1C5h 53m
07 Jan 2020 @ 0351 wc---6h 38m
06 Jan 2020 @ 2113 E---6h 9m
06 Jan 2020 @ 1504---6h 56m
06 Jan 2020 @ 0808 ie wc---5h 36m
06 Jan 2020 @ 0232 wc---10h 35m
05 Jan 2020 @ 1557 wc-2-6h 15m
05 Jan 2020 @ 0942 wc---5h 59m
05 Jan 2020 @ 0343 E---6h 50m
04 Jan 2020 @ 2053 wc-2-6h 54m
04 Jan 2020 @ 1359 wc---6h 25m
04 Jan 2020 @ 0734 E---6h 17m
04 Jan 2020 @ 0117 wc---5h 43m
03 Jan 2020 @ 1934 E---6h 52m
03 Jan 2020 @ 1242 ns wc-2-6h 37m
03 Jan 2020 @ 0605 E---14h 5m
02 Jan 2020 @ 1600 wc-2-6h 32m
02 Jan 2020 @ 0928 wc---5h 36m
02 Jan 2020 @ 0352 E---6h 28m
01 Jan 2020 @ 2124 E---5h 31m
01 Jan 2020 @ 1553 E---6h 8m
01 Jan 2020 @ 0945 ie wc---6h 27m
01 Jan 2020 @ 0318 E---12h 25m
31 Dec 2019 @ 1453 wc-1-7h 0m
31 Dec 2019 @ 0753 ns---6h 36m
31 Dec 2019 @ 0117 E---6h 21m
30 Dec 2019 @ 1856 E---6h 44m
30 Dec 2019 @ 1212 ns---6h 57m
30 Dec 2019 @ 0515 ie wc---5h 57m
29 Dec 2019 @ 2318 E---6h 27m
29 Dec 2019 @ 1651 wc---6h 4m
29 Dec 2019 @ 1047 E---6h 9m
29 Dec 2019 @ 0438 E---6h 23m
28 Dec 2019 @ 2215 E---6h 20m
28 Dec 2019 @ 1555 wc-2-6h 27m
28 Dec 2019 @ 0928---5h 57m
28 Dec 2019 @ 0331 ie wc---5h 54m
27 Dec 2019 @ 2137 E---5h 54m
27 Dec 2019 @ 1543 wc---5h 43m
27 Dec 2019 @ 1000 A---6h 37m

Interval Statistics

Interval Count100
Min5h 0m
Max18h 19m
Mean6h 36m
Median6h 16m
Grand-Specific
Start7G/4T (63.64% G)
Max Bursts2
Mean Bursts1.48
Median Bursts1
End7Q/4C (63.64% Q)

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13954 17 Oct 2019 @ 0945 --- AngelaT Grand has not yet erupted, now ending its window of +/- 45 minutes.
13948 16 Oct 2019 @ 0855 16 Oct 2019 @ 0918 RLJones Post eruptive. Overflow has not yet rerurned
13827 28 Sep 2019 @ 1738 --- susiebb It was a Grand start, abruptly, and the initial burst was so high that, if I had seen it out of context, I would swear it was a second burst. And it was the first I have ever seen that the second burst height did not exceed the initial.
13820 27 Sep 2019 @ 1731 27 Sep 2019 @ 1743 Ajw Started splashing shortly after Vent began. Several tall splashes. Ended at 1743.
13173 11 Aug 2019 @ 2025 --- William post eruptive. Turban and Vent active, Rift also on.
13112 08 Aug 2019 @ 1500 08 Aug 2019 @ 1511 JSJ Inclinometer reading: Highest water about 130 feet.
13097 07 Aug 2019 @ 1235 07 Aug 2019 @ 1246 JSJ Inclinometer reading: Grand's highest water reached about 165 feet.
12388 06 Jul 2019 @ 1841 --- User34 First overflow
11678 09 Jun 2019 @ 1505 --- User34 Pool half full
11581 04 Jun 2019 @ 1724 --- JSJ Inclinometer reading of highest spouts indicate Grand Geyser reached 113 feet high.
11371 27 May 2019 @ 0628 --- TSBryan Grand empty, Vent and Turban i.e.
11335 24 May 2019 @ 0749 24 May 2019 @ 0759 RLJones Grand empty with occasional gurgling and spits of water just barely visible by viewing from standing on bench
11162 04 May 2019 @ 0733 --- RLJones 0733 eruption was 1 burst
11113 28 Apr 2019 @ 0737 --- ddshepard Pool is empty. Looks like it erupted recently but fresh snow is on boardwalk with some ice underneath.
11095 27 Apr 2019 @ 0814 --- Micah Kipple Empty but I can hear it refilling.
10974 09 Apr 2019 @ 2359 --- Graham Grand assumed to erupt before midnight for another 5-Grand day. Joe saw steam from turban and vent on the webcam just after midnight.
10799 27 Dec 2018 @ 1635 --- JarnoO IE from static frame. Based on plume size probably exact, though not sure when that frame was taken.
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 Jones 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 --- JarnoO 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 --- JarnoO 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 --- JarnoO 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 --- JarnoO 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 --- JarnoO May have erupted. Last visible steam was about 10 to 11 minutes after noticing it.
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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