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San Simeon Earthquake 20th Anniversary

December 19, 2023 @ 1:00 pm - 2:00 pm

On December 22, 2003, a magnitude 6.5 earthquake shook the Central Coast of California at 11:15 am, centered 7 miles northeast of San Simeon. At the time it was the most damaging earthquake in California ($250-$300 million) since the 1994 Northridge earthquake. Two people died as they ran outside a building and its façade fell onto them.

ECA Central Coast organized a special webinar to commemorate the 20th anniversary of this earthquake, on December 19, 1-2pm. The webinar presented the science of what happened, reviewed the immediate response and major impacts, and shared how the region recovered. The agenda and speakers are listed below.



Picture of Anthony Rodriguez
Anthony Rodriguez (Foodbank of Santa Barbara County and ECA Central Coast Co-Chair)

Welcome and Webinar Overview


Picture of Russell Grayner
Russell Grayner (U.S. Geological Survey)
Geologic Setting of the San Simeon Earthquake


Picture of Dan Turner
Chief Dan Turner (CAL FIRE – San Luis Obispo Fire Chief (retired) & Cal Poly Wildland-Urban Interface FIRE Institute)
Emergency Response Following the San Simeon Earthquake


Picture of Alan Hanson
Alan Hanson (Simpson Strong-Tie (retired) and ECA Socal Co-Chair)
Buildings damaged by the San Simeon earthquake, and examples of repair or retrofit


Picture of Janiele Maffei
Janiele Maffei (California Earthquake Authority)
California Earthquake Authority Response to the San Simeon Earthquake


Picture of a group meeting over Zoom.
General Discussion




Webinar Video Recording (Youtube; also view below)

Webinar Slides (PDF; content shared live by panelists is not included)

Brief survey (Please complete after viewing the workshop (live or recorded)

(Click “CC” to see captions, once the video starts playing)

QUESTIONS: info@earthquakecountry.org


December 19, 2023
1:00 pm - 2:00 pm