Triggered slip on the Calaveras fault during the magnitude 7. 1 Loma Prieta, California, earthquake

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL017i008p01227· OSTI ID:6148022

McClellan, P H; Hay, E A

After the magnitude (M) 7.1 Loma Prieta earthquake on the San Andreas fault the authors inspected selected sites along the Calaveras fault for evidence of recent surface displacement. In two areas along the Calaveras fault they documented recent right-lateral offsets of cultural features by at least 5 mm within zones of recognized historical creep. The areas are in the city of Hollister and at Highway 152 near San Felipe Lake, located approximately 25 km southeast and 18 km northeast, respectively, of the nearest part of the San Andreas rupture zone. On the basis of geologic evidence the times of the displacement events are constrained to within days or hours of the Loma Prieta mainshock. They conclude that this earthquake on the San Andreas fault triggered surface rupture along at least a 17-km-long segment of the Calaveras fault. These geologic observations extend evidence of triggered slip from instrument stations within this zone of Calaveras fault rupture.

• OSTI ID: 6148022
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 17:8; ISSN GPRLA; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
CALIFORNIA
CREEP
DEFORMATION
DIMENSIONS
EARTHQUAKES
FEDERAL REGION IX
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
LENGTH
MECHANICAL PROPERTIES
NORTH AMERICA
SEISMIC EFFECTS
SEISMIC EVENTS
SLIP
TIME DEPENDENCE
USA