Earthquakes in the San Francisco Bay Area
Sheryl Braile, Happy Hollow School West Lafayette, IN
Larry Braile, Purdue [email protected], 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 [email protected], 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
