Extremal Bounds on Earthquake Movement from Geodetic Data - Application to the Landers Earthquake

Citation:
Johnson, HO, Agnew DC, Hudnut K.  1994.  Extremal Bounds on Earthquake Movement from Geodetic Data - Application to the Landers Earthquake. Bulletin of the Seismological Society of America. 84:660-667.

Date Published:

Jun

Keywords:

borah peak, california, crustal deformation, displacements, inversion, parkfield, san-andreas fault, sequence, slip

Abstract:

We present a technique to place quantifiable bounds on the moment of an earthquake from geodetic data, assuming known fault geometry. Application of this technique to the 1992 Landers earthquake shows that the moment must have been between 0.84 and 1.15 x 10(20) Nm with 90% confidence (M 7.25 to 7.34). We also find that to satisfy the data to this same level of confidence, the slip on the fault must have exceeded 7 m in at least one location, in good agreement with field mapping of the surface rupture.

Notes:

n/a

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