Seen on multiple nodes managed by different institutions, feeding back to the CERI / Midwest USGS official charts across the region… what can only be described as low end vibrations, over a VERY large area.
NOT to be confused with earthquakes elsewhere around the planet, this is something I have not seen before over such a wide area.
Did the sensor network undergo some kind of damage? Is there some kind of interference happening? Is this a REAL detection of low frequency vibrations occurring?
Time will tell on this…
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Here is the main link .. .click on CERI, SLU, or any of the other ‘nodes’.. then select 11/30/2012 (most current charts).. and then compare to a few days or weeks, or months ago by clicking back through the charts (listed by date):
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use these links here to monitor earthquake activity nationally, and internationally:
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The Live Internet Seismic Server also shows this activity.http://earthquake.usgs.gov/monitoring/operations/heliplots_anss.php
