EARTHQUAKE : South Napa, California Flashcards
1
Q
Date?
A
August 2014
2
Q
Details?
A
- epicentre south of Napa
- 11km deep
- 12 aftershocks
3
Q
Magnitude?
A
6.0 MMS
4
Q
Intensity?
A
VIII on the Mercalli scale
5
Q
Hazard cause?
A
- West Napa fault
- conservative margin
6
Q
Primary hazards?
A
- shear waves
- ground shaking
- ground rupture
7
Q
Secondary hazards?
A
- six major fires
- building collapse
8
Q
Primary impacts?
A
- older commercial buildings damaged despite retrofitting
- broken water main
- wineries damaged
9
Q
Secondary impacts?
A
- 1 dead
- 200 injured
- fallen debris caused injury
10
Q
Economic impacts?
A
- 613 buildings damaged
- cost of $362 million - $1 billion
- wine industry lost $80-100 million
- infrastructure cost $57.9 million
11
Q
Social impacts?
A
- damaged churches
- historic buildings damaged
12
Q
Environmental impacts?
A
temporary increase of water flow in local streams
13
Q
Political impacts?
A
- Governor Jerry Brown declared state of emergency
- Obama declared major disaster
14
Q
Risk?
A
- conservative margin
- West Napa Fault
- common
15
Q
Vulnerability?
A
- wealthy
- poor hazard perception (fatalism)
- retrofitting and aseismic buildings
