Earthquakes in the San Francisco Bay Area

Sheryl Braile, Happy Hollow School West Lafayette, IN

Larry Braile, Purdue Universitybraile@purdue.edu, www.eas.purdue.edu/~braile

CSTA Convention, Oct. 2006, San Francisco, CA

http://web.ics.purdue.edu/~braile/edumod/bayarea/BayAreaEQs.ppthttp://web.ics.purdue.edu/~braile/edumod/bayarea/bayareaNew.htm

2004 USGS Map:

Earthquakes and Faults in the San Francisco Bay Area

http://wrgis.wr.usgs.gov/docs/gump/zulanger/bayarea/landsat.html

Old version (1990 map/satellite image):http://web.ics.purdue.edu/~braile/edumod/bayarea/bayarea.htmNew version (2004 map):http://web.ics.purdue.edu/~braile/edumod/bayarea/bayareaNew.htm

The 1906 San Francisco

Earthquake (M~7.8)

Photo by G.K. Gilbert

The 1906 San Francisco Earthquake (M~7.8) ~3 m right lateral offset on the San Andreas fault

The 1906 San Francisco Earthquake (M~7.8) San Andreas fault at Earthquake park near Tomales Bay

(road to Point Reyes)http://www.seed.slb.com/en/scictr/watch/seismology/pt_reyes.htm

1906Today

The 1906 San Francisco Earthquake (M~7.8) San Andreas fault at Earthquake park near Tomales Bay

(road to Point Reyes)http://www.seed.slb.com/en/scictr/watch/seismology/pt_reyes.htm

Offset FenceDamaged Barn

(subsequently razed)

The 1906 San Francisco Earthquake (M~7.8) San Francisco after the Earthquake and fire.

The 1906 San Francisco Earthquake (M~7.8) San Francisco after the Earthquake and fire.

The 1906 San Francisco Earthquake (M~7.8) De-railed train.

The 1906 San Francisco Earthquake (M~7.8) Comparison of fault lengths for selected significant events on the San Andreas.

San Andreas Fault

San Andreas Fault – A Right-Lateral Strike-Slip FaultWhat is the relative motion?Why is it called right-lateral?

The 1906 San Francisco Earthquake (M~7.8) MM Intensity Map

The 1906 San Francisco Earthquake (M~7.8) MM Intensity Map

The 1906 San Francisco Earthquake (M~7.8) MM Intensity Map

The 1906 San Francisco Earthquake (M~7.8) MM Intensity Map

The 1906 San Francisco Earthquake (M~7.8) San Francisco bay area geology.

The 1906 San Francisco Earthquake (M~7.8) Near-surface sediments shear wave velocity – an indicator of site response for earthquake shaking.

The 1989 Loma Prieta Earthquake (M7.0) Earthquake damage.

San Francisco bay area geology.

http://www.abag.ca.gov/cgi-bin/pickmapx.pl

Site response map

Earthquakes in California Nevada area1973 – 2006 M3+

The Seismic Eruption softwarehttp://www.geol.binghamton.edu/faculty/jones/

Earthquakes in California Nevada area1973 – 2006 M3+

Earthquakes in California Nevada area1973 – 2006 M3+

Close-up of Northern CA area

Northern SanAndreas Fault (area that slippedin 1906)

Earthquakes in San Francisco Bay area

1973 – 2006 M1+Plotted with

Seismic Eruption

Earthquakes in San Francisco Bay area

1973 – 2006 M1+Plotted with

Seismic Eruption(bayarea.hy4 file,

3434 events)

Earthquakes in San Francisco Bay area

from significant U.S. earthquakes catalog

1805 - 1989Plotted with

Seismic Eruption

Digital satellite images of the San Francisco Bay area and major faultshttp://www.sfbayquakes.org/

http://pubs.usgs.gov/gip/2006/21/gip-21.pdf

Earthquake resources

Soft first story failure Earthquake hazards and damage

Building shifted off foundation

Falling objects

Falling objects

2002 Nisqually EQ

Olive View Hospital, 1971 San Fernando Earthquake

Olive View Hospital, 1971 San Fernando Earthquake

Dec. 26, 2003M6.6 Earthquake,Bam, Iran,~80% of buildingsdestroyed

http://pubs.usgs.gov/gip/2005/15/

Putting Down Roots in Earthquake Country

Your Handbook for the San Francisco Bay Region

Earthquake hazards resources

M5.5+ earthquakes and probability estimate

M6+ earthquakes before and after the 1906 event.

Earthquakes in the San Francisco Bay Area

Sheryl Braile, Happy Hollow School West Lafayette, IN

Larry Braile, Purdue Universitybraile@purdue.edu, www.eas.purdue.edu/~braile

CSTA Convention, Oct. 2006, San Francisco, CA

http://web.ics.purdue.edu/~braile/edumod/bayarea/BayAreaEQs.ppthttp://web.ics.purdue.edu/~braile/edumod/bayarea/bayareaNew.htm