Structural damage, consisting mainly of cracks
in chimneys and walls, broken windows and
plaster, and loosened light fixtures, occurred
at several schools, hospitals, and houses in the
Oroville-Thermalito area. Many chimneys toppled
or had to be taken down in Oroville and Palermo.
Property damage was estimated at $2.5 million.
This earthquake was associated with the first
recorded surface faulting in the western
foothills of the Sierra Nevada. New fractures
in the ground were observed in a 3.8-km-long
north- to north-northwest-trending zone. The
block east of the fault moved upward relative to
that on the west, as shown by about 55 mm of
slip across the surface ruptures and 180 mm of
vertical movement of benchmarks near the rupture
zone. Felt over a large area of northern
California and western Nevada.
Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological
Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.
Damage Photos from the USGS Photographic Library
M7.3 - Philippines, 1968
An estimated 207 residents were killed,
many were injured, and widespread property
damage occurred. The greatest loss of life
was sustained in Manila when a six-story
apartment building collapsed into a pile
of rubble. A river was blocked at Maddela in
the province of Nueva Vizcaya. Ground fissures
were noted between Casiguran and Baler; some were
reported to be 7 or more kilometers long.
Damage to private buildings in Manila was extensive,
with six structures of six to eight floors
severely damaged. Fire ignited by the shock caused
an estimated $7.5 million damage in the harbor area.
From United States Earthquakes, 1968.
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