Northridge Earthquake

Paper Summary:

Analysis of January 1994 Southern California earthquake. Focal depth of 6.7 magnitude quake. Blind thrust type quake. The fault involved (Oak Ridge system, Pico thrust). Types of damage from the quake (liquefacation, lateral spreading, landslides, differential compaction). Greter damage to Santa Monica. Comparison to 1971 Sylmar earthquake. Retrofitting & engineering codes.

From the Paper:

"1994 Northridge Earthquake
The 1994 Northridge Earthquake occurred at 4:30:55 AM PST on January 17, 1994. It was measured as a magnitude 6.7 on the Richter scale. This quake occurred along the Northridge Thrust, a fault that is also known as the Pico Thrust. It was centered about 20 miles northwest of Los Angeles and approximately 1 mile south southwest of Northridge. This quake was a blind thrust type quake.


This particular fault dips to the south at an almost 45 degree angle. As a result, quakes along this fault and similar thrust faults falsely appear far removed from the surface trace. This particular fault forms the ridge slightly to the south of its trace, paralleled by the Santa Clara River and California Sate Highway 126. It begins near the town of Piru in the east and ends just..."

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