1. SAFRR: Science Application for Risk Reduction
NATURAL HAZARDS MISSION AREA Earthquake Hazards Program
150th Anniversary of the 1868 Hayward fault earthquake Earthquake Country Alliance Cisco, San Jose, March 1, 2018
Opportunity
Ideas
Messages
Partners
Jack Boatwright, Tom Brocher, Susan Garcia, Scott Haefner, Keith Knudsen, Jim Lienkaemper, David Schwartz

2. 1868 “the great San Francisco earthquake”
Magnitude 6.8
30 fatalities, 5 in San Francisco (7th most lethal California earthquake)
Extensive damage in San Leandro, Hayward, and Fremont (total population less than 2000—now is over 500,000)
Bay Area population was 260,000 (at 7 million, it is now 27 times larger)
ShakeMap
1868 earthquake was called the great San Francisco earthquake until 1906
1868 ShakeMap by Jack Boatwright and Howard Bundock of the USGS, based on work by Toussan Toppozada of the Calif. Geol. Survey
Diamonds show locations where intensity reports were made
USGS OFR

3. Haywards Hotel, Haywards, 1860s
Society of California Pioneers
Haywards Hotel, Haywards, 1860s
View east towards Hayward before the 1868 Earthquake, showing how few people lived there at the time
Population of Hayward in 1870 was 500 inhabitants, today there are 140,000, over 277 times more residents
Hayward Fault runs across photo near base of the escarpment below Hayward Hotel
Hayward was heavily damaged by the 1868 earthquake. “Practically not a house was left on its foundations…” “Many buildings were much damaged.” (Lawson Report, 1908).

4. 2nd Alameda Co. Courthouse, San Leandro
Society of California Pioneers
“At San Leandro the shock was more sensibly felt than at any other point on that side of the Bay. All the buildings were terribly shaken, adobes were thrown to the ground, brick structures, and even frame buildings were demolished. The Court House and County Jail were shaken down.”
San Francisco Morning Call, 22 Oct. 1868

5. Alameda Co. Courthouse San Leandro
Courtesy San Leandro Public Library
Mr. J.W. Joslyn, Deputy County Clerk, died in an attempt to escape the Courthouse
Lawson Report, 1908
Bancroft Library
Alameda Co.
Courthouse
San Leandro

6. The 1868 quake impacted building design in the Bay Area through 1906
Stephen Tobriner, Bracing For Disaster, 2006.
UC Berkeley, South Hall, built 1873

7. Memorial Park, Hayward:
Hayward Fault offsets construction all along the East Bay

8. ◊11= this cartoon shows ages of the 12 southern Hayward earthquakes with 95-percentile error ranges shown in light pink
◊ The orange line represents a linear regression fit of these ages. The mean recurrence interval of 161 ± 65 yr gives a coefficient of variation of 0.40, suggesting a fairly regular process
◊ In the next slide, I compare these earthquake ages to some paleoearthquake records from nearby faults
SUMMARY: 12-EVENT

9. https://earthquake.usgs.gov/earthquakes/events/1868calif/

10. Assistance from partners:
Publications to highlight
Web site content & events
Messaging expertise
Media event ideas
Brainstorming

11. Some potential themes:
Encourage retrofits or replacements by showcasing retrofit or rebuilt buildings or infrastructure
Encourage preparedness
Tell the story of what happened in 1868
Education about post seismic slip, ShakeAlert, aftershocks

12. Important Dates to Remember
Your Mom’s birthday
HayWired rollout – Wednesday, April 18
Shakeout – Thursday, October 18
Media events – Friday, October 19
th anniversary – Sunday, October 21
Other events – spread over weeks/months leading up to anniversary
Election day, Tuesday November 6

13. We look forward to partnering with you!
SAFRR: Science Application for Risk Reduction
SAFRR: Science Application for Risk Reduction …
NATURAL HAZARDS MISSION AREA Earthquake Hazards Program
th Anniversary
We look forward to partnering with you!
Tom Brocher,
Susan Garcia,