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Yellowstone Earthquake Swarm: Updated
January 02, 2009 09:27 AM ET | James Pethokoukis | Permanent Link | Print
More on the Yellowstone earthquake swarm at the supervolcano caldera. First, this piece of database analysis from an IT guy at Splunk puts the swarm into scary perspective:
I'm sending you this email with some information I've gleaned from the USGS archives. I'm analyzing the ANSS data (www.ncedc.org...) in an install of Splunk, which is a timeline based search and reporting engine. I have 30 years of data in the system, with about 2M quakes total. It makes doing graphs and adhoc investigations faster than dealing with the USGS limited search forms. Disclaimer: I work for Splunk as their evangelist, and spend a lot of time studying various timeline based textual data and writing interesting apps for the software. I am not an earthquake expert by any means.
Using the ANSS data, I discovered the number of 2.5 or higher quakes in the *general* Yellowstone area for the decade of the 1980s was 128. The number of 2.5 or higher quakes for the region directly around the lake in the *last 4 days* was 30.
Again, for 2.5 mag or greater quakes:
Entire region of Yellowstone for 10 years = 128 quakes
Area just around Yellowstone Lake last 4 Days = 30 quakes
The entire 1980s of 2.5 or higher quakes in the vicinity of the lake was a paltry 4 quakes. Doing a quick back of the envelope calculation using the number of quakes and the intesities, the activity over the last 4 days has released roughly 100x the amount of energy released in the entire 1980s for the same general region. In the last week alone there have been 10 quakes of magnitude 3.0 or greater around the lake, with one as high as 3.8.
This earthquake sequence is the most intense in this area for some years. No damage has been reported within Yellowstone National Park, nor would any be expected from earthquakes of this size. The swarm is in a region of historical earthquake activity and is close to areas of Yellowstone famous hydrothermal activity. Similar earthquake swarms have occurred in the past in Yellowstone without triggering steam explosions or volcanic activity. Nevertheless, there is some potential for hydrothermal explosions and earthquakes may continue or increase in magnitude. There is a much lower potential for related volcanic activity.
Originally posted by czacza
reply to post by violet
the page does not exist. or I have some problems to get there. but as I saw the status is still normal green.
Originally posted by hawk65
source: www.usnews.com...
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
Yellowstone Lake Earthquake Swarm Update: 2 January 2008
The University of Utah Seismograph Stations reports that as of 1800 MST on 2 January 2009, seismicity of the ongoing Yellowstone earthquake swarm continues. Over 500 earthquakes, as large as M 3.9, have been recorded by an automated earthquake system since the inception of this unusual earthquake sequence that began Dec. 27, 2008. More than 300 of these events have been reviewed and evaluated by seismic analysts. Depths of the earthquakes range from ~ 1km to around 10 km. We note that the earthquakes extend northward from central Yellowstone Lake for ~10 km toward the Fishing Bridge area, with a migration of recent earthquakes toward the north. Some of the dozen M3+ earthquakes were felt in the Lake, Grant Village and Old Faithful areas. Personnel of the Yellowstone Volcano Observatory continue to evaluate this earthquake sequence and will provide information to the NPS, USGS and the public as it evolves.
This earthquake sequence is the most intense in this area for some years. No damage has been reported within Yellowstone National Park, nor would any be expected from earthquakes of this size. The swarm is in a region of historical earthquake activity and is close to areas of Yellowstone famous hydrothermal activity. Similar earthquake swarms have occurred in the past in Yellowstone without triggering steam explosions or volcanic activity. Nevertheless, there is some potential for hydrothermal explosions and earthquakes may continue or increase in magnitude. There is a much lower potential for related volcanic activity.
The University of Utah operates a seismic network in Yellowstone National Park in conjunction with the National Park Service and the U.S. Geological Survey. These three institutions are partners in the Yellowstone Volcano Observatory. Seismic data from Yellowstone are transmitted to the University in real-time by radio and satellite links from a network of 28 seismographs in the Yellowstone area and are available on the web
Originally posted by JohnnyAnonymous
Because of the interest in Mr. Sanders proclamation, the ATS:MIX is attempting to arrange an interview with this geologist.
If you would like to post your questions (if we are able to get him on the ATS:MIX), then please go to this link to post them. You can post more than one question, but we will only ask one question in "your name" (but if it's really a good question.. Dave and I may still ask it)
Post Questions for Christopher Sanders, The Geologist Warning About Yellowstone
All discussions should continue and remain here on this thread and not on the ATS:MIX "Questions Thread".
We hope you'll have some interesting questions,
Johnny
Originally posted by violet
New development as of Saturday, Jan 3, 2009 at 03:51:47 PST
Yellowstone has now been added to the elevated volcanic activity list.
elevated volcanic activity
[edit on 3-1-2009 by violet]