THE MAGNITUDE 6.0 NAPA CALIFORNIA EARTHQUAKE STRUCK AT 3:20 AM 24 AUGUST 2014. Bad news for Californians: The Napa quake occurred on a a relatively unknown and unmonitored small fault segment, (of which there are hundreds)not the well known and much longer San Andreas and Hayward fault zones. The quake's timing was also bad for Napa Valley's famed vineyards, where winemakers are about one month away from harvesting the 2014 crop. Buildings that were damaged or overstressed by the M6.0 quake may be more susceptible to collapse from its aftershocks. Presentation courtesy of Dr. Walter Hays, Global Alliance for Disaster Reduction

1. THE MAGNITUDE 6.0 NAPA , CA
EARTHQUAKE
3:20 AM, AUGUST 24, 2014

2. The M6.0 Napa earthquake was
the strongest in the San
Francisco Bay area since the
M6.9 1989 Loma Prieta quake,
BUT it only had about 1/30th of
Loma Prieta’s energy release

3. • The Bay Area is prone to large
earthquakes because it straddles the
boundary between two major
tectonic plates — the North American
and Pacific plates.

5. EARTHQUAKE SCENARIOS
A DISASTER RISK REDUCTION
TECHNIQUE FOR USE IN ANY
EARTHQUAKE-PRONE AREA

6. NORTHERN CALIFORNIA
SCENARIO
(developed in 2008)
BASED ON INTEGRATED KNOWLEDGE
FROM MONITORING, RESEACH, AND
POSTEARTHQUAKE STUDIES SINCE
APRIL 1906

10. • Much of the stress release happens
on the San Andreas fault, but some of
it is relieved by the Hayward fault and
other smaller parallel faults.

11. • Because of its location in the densely
populated Bay area of 7 million
people, a Hayward fault quake is likely
to cause worse societal impacts than a
San Andreas quake and be one of the
nation's largest natural disasters.

13. DAMAGE
PHYSICAL EFFECTS CAUSE SOCIETAL
IMPACTS AND RISK
COLLAPSE
LOSS OF
FUNCTION
ECONOMIC
LOSS
RISK

14. • Damage will be extensive to
buildings and infrastructure.
•The region's transportation
infrastructure and water delivery
systems are expected to take a major
hit in a M7.0 or greater earthquake.

15. • A M7.0 earthquake on the Hayward
fault, WHICH HAS NOT YET
HAPPENED, will cause an estimated
$210 billion dollars in damage.

16. BAD NEWS FOR CALIFORNIANS:
The Napa quake occurred on a a
relatively unknown and
unmonitored small fault segment,
(of which there are hundreds)
not the well known and much
longer San Andreas and Hayward
fault zones

17. LOCATION: AUGUST 24 NAPA
VALLEY EARTHQUAKE

18. LOCATION: AUGUST 24 NAPA
VALLEY EARTHQUAKE

19. USGS’ SHAKE MAP: AUGUST 24
NAPA VALLEY EARTHQUAKE

20. AUGUST 24: EARLY REPORTS OF
SOCIOECONOMIC IMPACTS
• Local damage to buildings and
houses, and infrastructure
• Injuries, but no deaths (yet)
• Damage to interior contents of
homes and stores
• Loss of power, gas, and water for
70,000

21. DAMAGE: AUGUST 24 NAPA
VALLEY EARTHQUAKE

22. DAMAGED BUILDING WERE
CORDONED OFF

23. DAMAGE: NAPA COUNTY SIPREME
COURT BUILDING

24. RUBBLE FROM THE COUNTY
COURT HOUSE

25. DAMAGE: CORNER OF AN UPPER
FLOOR OF A BUILDING

26. INJURIES: PEOPLE HURT IN THE DARK:
ESPECIALLY FROM CUTS FROM GLASS

27. DAMAGE TO INTERIOR CONTENTS:
AUGUST 24 NAPA VALLEY EARTHQUAKE

28. DAMAGE TO INTERIOR CONTENTS:
AUGUST 24 NAPA VALLEY EARTHQUAKE

29. AUGUST 24: EARLY REPORTS OF
SOCIOECONOMIC IMPACTS
• Damage to Highway 12
• fires, especially in mobile homes
• Damage to wine barrels
• Damage to vineyards, which were
scheduled for harvest the next day
• Aftershocks

30. DAMAGE TO HIGHWAY 12: AUGUST
24 NAPA VALLEY EARTHQUAKE

31. DAMAGE TO HIGHWAY 12: AUGUST
24 NAPA VALLEY EARTHQUAKE

32. BURNED OUT MOBILE HOME: AUGUST
24 NAPA VALLEY EARTHQUAKE

33. The quake's timing was also bad
for Napa Valley's famed
vineyards, where winemakers
are about one month away from
harvesting the 2014 crop.

34. DAMAGE TO WINE BARRELS: AUGUST
24 NAPA VALLEY EARTHQUAKE

35. Thousands of bottles of wine
were broken and hundreds of
barrels of wine in storage were
toppled.

36. AFTERSHOCKS:
Buildings that were damaged or
overstressed by the M6.0 quake
may be more susceptible to
collapse from its aftershocks.

37. EVERY TIME AN EARTHQUAKE DISASTER OCCURS,
WE HAVE NEW KNOWLEDGE TO ADD TO OUR
“BOOKS OF KNOWLEDGE”