Seismic Reflection Image along I-64 Pratt et al., 1988 Coruh et al., 1988.

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Presentation transcript:

Seismic Reflection Image along I-64 Pratt et al., 1988 Coruh et al., 1988

Ground acceleration at the North Anna Power Station during the August 23 rd 2011 earthquake Graph by Martin Chapman, Va Tech

Ground acceleration at the North Anna Power Station during the August 23 rd 2011 earthquake Graph by Martin Chapman, Va Tech Peak ground acceleration 260 cm -2 or 0.26 g or 26% of gravity 1971 Report for VEPCO “that the maximum horizontal ground acceleration… at the site due to such a shock would be no more than 12% of gravity”

shaking too strong for instrument 55 km from epicenter 127 km from epicenter 193 km from epicenter 231 km from epicenter time (seconds) Shaking in Virginia VTSO

Shaking Across USA C. Bailey & U. South Carolina

Felt Shaking USGS

Epicenter, August 23 Mainshock National Earthquake Hazard Map USGS

Fault Motion

Aftershocks at Depth R. Herrmann slice along N120˚E

Louisa County VA DMME photos