Eruption 1147346

Date:2019-09-11
Time:2140
Geyser:Steamboat
Webcam:No
Initial:No
Major/Minor:Major
Duration:25min
Standardized Duration:25m
Time Entered:2019-09-11 22:03:04
Time Updated:2019-09-12 11:42:05
Time Uploaded:2019-09-12 20:50:26
Entrant:William
Observer:Casey, Aaron, Doug, Bill, the Birthday Girl- Carol, and I.
Submitted to:GeyserTimes for Android
Comments:Observed a 20' concerted minor around 20:30 with wide output, otherwise no significant activity prior to eruption. At 22:05 transition to steam. 22:14 back to water. 22:22 to steam. 22:27 to water. 22:35 to steam. Began to pause and resart after 2 hours and 40 minutes! Mixed water out of both vents would give way to a heavy steam takeover in SV turning NV off. After 10-15 seconds one or both vents would take off again often to 100-150ft. Observed 3 SV solo eruptions where it started to 40-50ft but NV did not play. pauses 23:18, 23:20, 23:21, 23:25, 23:26, 23:29, 23:30, 23:35, 23:36, 23:38, 23:42, 23:45, 23:46, 00:14 solo SV and then NV restart. 00:17 pause and failed resart before resart at 00:17, 00:18, 00;22, 00:24, 00:26, 00:33 pause and failed resart before resart at 00:33, 00:34, 00:36 pause and failed resart before resart at 00:36, 00:40 South solo for 15-20sec., 00:42 pause and failed resart before resart at 00:42, 00:44, 00:45, 00:46, 00:48, 00:49, 00:50. 01:00.

l think it is noteworthy that l noticed the SV runoff channel turning white on Tuesday afternoon. CB said she noticed it earlier and by Wednesday, it had become much whiter.
Entrant: bbev
Time Entered:2019-09-12 12:19:43
Time Updated:2019-09-12 12:33:22
Time Uploaded:2019-09-12 12:33:25
Submitted to:GeyserTimes for Android
Additional pauses and restarts observed at 01:01 and 01:03. Left basin afterwards with south vent in full steam and north vent in mixed water/steam phase. Runoff during the eruption turned Tantulus Creek a milky white color all the way to the crossing near Vixen.
Entrant: Casey
Time Entered:2019-09-13 09:57:17
Time Updated:2019-09-13 11:07:07
Time Uploaded:2019-09-13 11:07:08
Submitted to:GeyserTimes for iOS
bbev
Time Entered:2019-09-12 11:41:11
Time Uploaded:2019-09-12 11:41:13
Submitted to:GeyserTimes for Android
cb
Time Entered:2019-09-12 12:56:38
Time Uploaded:2019-09-12 12:56:43
Submitted to:GeyserTimes for Android
Yates
Time Entered:2019-09-13 12:36:02
Time Uploaded:2019-09-13 12:36:03
Submitted to:GeyserTimes for iOS
No flags for this eruption.
https://www.flickr.com/photos/jsjgeology/48721504181Norris Museum seismogram showing the entire signature of Steamboat Geyser's 9:40 PM-onward major eruption on 11 September 2019.
Entrant: JSJ
Time Entered:2019-09-12 13:19:43
Time Uploaded:2019-09-12 13:19:43
Submitted to:Geysertimes.org
https://www.flickr.com/photos/jsjgeology/48721680917Norris Junction seismogram showing the entire signature of Steamboat Geyser's 9:40 PM-onward major eruption on 11 September 2019.
Entrant: JSJ
Time Entered:2019-09-12 13:20:24
Time Uploaded:2019-09-12 13:20:24
Submitted to:Geysertimes.org
https://www.flickr.com/photos/jsjgeology/48721504221Tantalus Creek discharge graph showing Steamboat Geyser's 9:40 PM-onward major eruption on 11 September 2019.
Entrant: JSJ
Time Entered:2019-09-12 13:21:18
Time Updated:2019-09-12 13:22:18
Time Uploaded:2019-09-12 13:21:47
Submitted to:Geysertimes.org


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