Geol 210
1994 Northridge Earthquake GEOL 210
Ivonne Perez
Heydi
Kaylah Wright-Soler
Zhipeng
Northridge 1994
The 1994 Northridge Earthquake was a magnitude 6.7, blind thrust earthquake that occurred January 17
Blind thrust earthquake: occurs along a thrust fault that does not show signs on the Earth's surface, hence the designation "blind".
Epicenter: Reseda, a neighborhood in the San Fernando Valley
Northridge 1994
January 17, 1994 at 4:31a.m.
Plate boundary between the Pacific & North American Plate (San Andreas)
Blind Thrust Fault
57 people died and over 9.000 people were injured.
More than 20,000 people were displaced from their homes due to the earthquake.
Freeways, apartments, health clinics, gas lines and homes within Simi Valley and the San Fernando Valley, and East and West Los Angeles were affected.
Property damage cost : $20 Billion
CSU Northridge : $250 - 350 Million
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CSU Northridge Parking Structure
San Fernando Valley
Santa Monica Freeway
Effects of the Earthquake
What were some of the primary effects?
Secondary effects? (For example, did liquefaction occur, any earthquake induced landslides, Tsunami etc.)
Ground failure
Liquefaction
- Where there any notable offsets?
Surface ruptures? Fault Scarps? (Explain the geomorphology)
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Seismology = Can you find any seismograms recorded for your earthquake?
- Is there a paleoearthquake record on this strand/fault? (Not all fault will have one).
- Find any shaking/modified Mercalli maps for the earthquake? How much gravitational acceleration was observed? What number was the earthquake on the Modified Mercalli Scale?