Last Known Eruption
2y 237d 17h 56m ago

Latest Eruptions

Eruption DurationInterval
22 Sep 2018 @ 225321d 5h 48m
01 Sep 2018 @ 1705119d 23h 48m
04 May 2018 @ 1717~3m 6m
04 May 2018 @ 17111m 15s 9d 21h 24m
24 Apr 2018 @ 19477m
24 Apr 2018 @ 19403m 291d 4h 10m
07 Jul 2017 @ 1530 ie9y 141d 5h 1m
19 Feb 2008 @ 092951d 48m
30 Dec 2007 @ 084153d 15h 38m
06 Nov 2007 @ 1703 ie10d 18h 18m
26 Oct 2007 @ 234510d 10h 23m
16 Oct 2007 @ 132217d 13h 42m
28 Sep 2007 @ 2340 ns20d 8h 10m
08 Sep 2007 @ 153035d 10h 52m
04 Aug 2007 @ 04386d 20h 53m
28 Jul 2007 @ 07459d 23h 40m
18 Jul 2007 @ 080519d 19h 34m
28 Jun 2007 @ 12317d 22h 21m
20 Jun 2007 @ 141020d 4h 34m
31 May 2007 @ 093611d 21h 30m
19 May 2007 @ 120617d 16h 56m
01 May 2007 @ 191049d 4h 42m
13 Mar 2007 @ 1428179d 21m
15 Sep 2006 @ 14076d 1h 27m
09 Sep 2006 @ 124041d 10h 3m
30 Jul 2006 @ 02376d 13h 19m
23 Jul 2006 @ 13185m
23 Jul 2006 @ 131346d 19h 49m
06 Jun 2006 @ 172423d 9h 21m
14 May 2006 @ 0803~1m 7d 9h 46m
06 May 2006 @ 2217~3m 6d 9m
30 Apr 2006 @ 22085m
30 Apr 2006 @ 220330-40 seconds1d 5h 36m
29 Apr 2006 @ 162720s 6d 4h 56m
23 Apr 2006 @ 1131~2m 18h 18m
22 Apr 2006 @ 1713~1m 30s 104d 21h 18m
07 Jan 2006 @ 1855154d 11h 8m
06 Aug 2005 @ 0847313d 10h 14m
26 Sep 2004 @ 2233119d 9h 13m
30 May 2004 @ 13202y 213d 21h 39m
29 Oct 2001 @ 1441109d 20h 25m
11 Jul 2001 @ 19163y 200d 2h 26m
24 Dec 1997 @ 155068d 7m
17 Oct 1997 @ 16433d 9h 24m
14 Oct 1997 @ 071916d 19h 44m
27 Sep 1997 @ 11357d 13h 27m
19 Sep 1997 @ 220811d 5h 42m
08 Sep 1997 @ 1626 A29d 7h 44m
10 Aug 1997 @ 08429d 2h 10m
01 Aug 1997 @ 06329d 22h 49m
22 Jul 1997 @ 074358d 20h 27m
24 May 1997 @ 1116 ns296d 17h 40m
31 Jul 1996 @ 1736 ns310d 2h 20m
25 Sep 1995 @ 1516361d 2h 26m
29 Sep 1994 @ 1250159d 16h 27m
22 Apr 1994 @ 2023 min2y 91d 7h 43m
22 Jan 1992 @ 114019y 179d 4h 10m
31 Jul 1972 @ 0830

Interval Statistics

Interval Count57
Min5m
Max19y 179d 4h 10m
Mean295d 16h 40m
Median20d 8h 10m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16090 12 Sep 2020 @ 1130 --- TheHikingDude 2 or 3 one foot blips from Mastiff, no other activity
13838 01 Oct 2019 @ 0920 01 Oct 2019 @ 0950 aferrara Water surging up and over Mastiff's depression, sometimes making it ~1' and splashing over the platform before dropping. Bijou on and strong throughout.
13400 25 Aug 2019 @ 1527 --- EmilyW Bijou on strong, seems that mastiff depth charges about 1-3’ above its depression in the platform occasionally
11136 29 Apr 2019 @ 1438 29 Apr 2019 @ 1445 Polly Depth charging
8136 10 May 2018 @ 0900 10 May 2018 @ 0915 Polly Mastiff almost continuously depth charging from the front vent 1-2 feet high with s couple of taller bursts. At 0911 Mastiff bursting increased but NO bathtub, then Bijou went to steam.
8033 28 Apr 2018 @ 0620 28 Apr 2018 @ 0922 Micah Kipple Still continuing its constant bursting and splashing from the front vent reaching 5-10 feet. Even during bathtubs.
7896 29 Jan 2018 @ 1350 --- Graham Mastiff depth charging when I arrived and throughout observation. Some splashes were accompanied with a "pop". 3' above the rim at times. Right vent sometimes sent a thick fan of water angled left to right rather than the more common smaller left right splashes. Two bathtubs during this time and I left after the second one with Mastiff still depth charging.
7050 23 Sep 2017 @ 1622 23 Sep 2017 @ 1634 Polly Numerous depth charges in Mastiff after the Bijou pause. Best I've seen this month.
2275 06 Sep 2015 @ 1524 --- BobInSLC water came up, footbath
2277 06 Sep 2015 @ 1227 --- Suzanne Bathtub followed by visible water in Emerald. Emerald was bubbling a couple of inches. Emerald seen bubbling again at approximately 1236.
16612 23 Mar 1998 @ 1610 23 Mar 1998 @ 1619 JarnoO 16:1x
No attachments for this geyser.
BaselineDistance (ft)Description
Cage 130South side of the jugwalk on the tee toward the Giant viewing platform