|
Year |
Location |
Magnitude |
Comment |
|
1903 |
Andreanof Islands, Alaska
|
7.0 |
One of the Largest Earthquakes in the United States.
|
|
1994 |
Northridge, California
|
6.7 |
Sixty people were killed, more
than 7,000 injured, 20,000 homeless and more than 40,000
buildings damaged in Los Angeles, Ventura, Orange and San
Bernardino Counties. Severe damage occurred in the San Fernando
Valley: maximum intensities of (IX) were observed in and near
Northridge and in Sherman Oaks. Lesser, but still significant
damage occurred at Fillmore, Glendale, Santa Clarita, Santa
Monica, Simi Valley and in western and central Los Angeles.
Damage was also sustained to Anaheim Stadium. Collapsed
overpasses closed sections of the Santa Monica Freeway, the
Antelope Valley Freeway, the Simi Valley Freeway and the Golden
State Freeway.
|
Fires caused additional damage in the San
Fernando Valley and at Malibu and Venice. Preliminary estimates
of damage are between 13 and 20 billion U.S. dollars. Felt
throughout much of southern California and as far away as
Turlock, California; Las Vegas, Nevada; Richfield, Utah and
Ensenada, Mexico. The maximum recorded acceleration exceeded
1.0g at several sites in the area with the largest value of
1.8g recorded at Tarzana, about 7 km south of the epicenter. A
maximum uplift of about 15 cm occurred in the Santa Susana
Mountains and many rockslides occurred in mountain areas,
blocking some roads. Some ground cracks were observed at
Granada Hills and in Potrero Canyon. Some liquefaction occurred
at Simi Valley and in some other parts of the Los Angeles
Basin.
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|
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