“If it turns out booms are coming from a mile or two deep, yeah, it's small earthquakes. But if the cause is determined to be only about 100 feet deep, then something else is happening.”
- Clifford Thurber, Ph.D., Geophysicist, Univ. of Wisconsin-MadisonReturn to Part 1. April 7, 2012 Washington, D. C. - A United States Geological Survey (USGS) research team headed by USGS geophysicist William Ellsworth, will be presenting their data at an upcoming Seismological Society of America meeting in San Diego, California, April 17 - 19. The presentations entitled, “Are Seismicity Rate Changes in the Midcontinent Natural or Manmade?”
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