Extremal Bounds on Earthquake Movement from Geodetic Data: Application to the Landers Earthquake
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 × 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.
© 1994, by the Seismological Society of America. Manuscript received 29 July 1993. The authors would like to thank P. Stark and R. Parker for sharing their computer code to simulate linear programming with one-norm misfits using BVLS. This work was supported by the Southern California Earthquake Center and the National Science Foundation.
Published - 660.full.pdf