Loam pretties Flashcards
date of eathquake
17th october 1989
time of earthquake
5.04 pm
magnitude of earthquake
7.1M
where was the epicentre
60 miles south of San Francisco
How was the earthquake caused
movement along the San Andreas fault along a conservative margin where Pacific and N. american plate slide past at strike-slip margin
what was the major seismic hazard
liquefaction as homes in the marina district built on loose, sandy soil which became permeated with water as a result liquefaction occurred causing damage contributing to the 10,000 homeless
Another secondary seismic hazard
landslides, 1000 landslides occurs resulting in rocks falling onto the freeway in particular the state highway disrupting traffic for a month
How many were killed due to collapsing roads
42 as a result of the 2 mile stretch of the Cryprus freeway collapsing
Burst pipe lines lead to what secondary hazard
30 fires
how many killed in total
63- this was lowe than the expected death toll as many people had gone home early to watch the world series baseball match missing commuting time when the earthquake struck
How many injuries
3,5000
Impact to buidlings
extensive streetcar damage being they had to be demolished despite EQ resistant building, on the other hand didn’t collapse and kill
How many bridges collapsed
80/1500 bridges sustained minor damages with 10 requiring temporary supports and 10 forced to close due to major structural damage
Search and rescue immediately along with advice from who
USGS
Which program was generally successful in mitigating the effects
Californian workplace and school earthquake preparedness program
