Observations of strain accumulation across the san andreas fault near palmdale, california, with a two-color geodimeter.
Two-color laser ranging measurements during a 15-month period over a geodetic network spanning the San Andreas fault near Palmdale, California, indicate that the crust expands and contracts aseismically in episodes as short as 2 weeks. Shear strain parallel to the fault has accumulated monotonically since November 1980, but at a variable rate. Improvements in measurement precision and temporal resolution over those of previous geodetic studies near Palmdale have resulted in the definition of a time history of crustal deformation that is much more complex than formerly realized.
Langbein
J O
JO
Linker
M F
MF
McGarr
A
A
Slater
L E
LE