PG&E and CISN: An Earthquake Country Partnership

Stu Nishenko

CISN Advisory & Steering Committees MeetingOctober 13, 2010 Sacramento CA

• PG&E Strong Motion Network • Partnership with CGS

• Central Coast Seismic Net• Partnership with USGS• 2003 San Simeon earthquake• Digital upgrade

• 2010 Eureka earthquake • ShakeMaps guide PG&E response

• 2010 San Bruno gas explosion

DCPP

PG&E Central Coast Seismic Network (CCSN)

Original analog site

DCPP

Completed digital upgrade

To be upgraded in 2010-2011

New digital site

Hosgri.

DCPPSan A

ndreas

Seismicity recorded by PG&E and the US Geological Survey1987- July 2010

M6.5 San Simeon

Acceleration data from the CCSN network now used in regional ShakeMaps

• Project is to replace old analog telemetry with digital velocity and acceleration recorders and digital telemetry.

• Addition of accelerometers provides on-scale recordings of large earthquakes.

• Increased dynamic range from digital telemetry improves small earthquake recordings, as well.

• Remote access to station data for status and parameters saves time and money on maintenance .

• Recorders at stations provide backup if telemetry goes down.

CCSN Digital Upgrade 2006-2011

San Bruno blast

10

Blast Area

Thank You!