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Magnitude-distance relations for liquefaction in soil from earthquakes

DEPARTMENT OF SEISOMOTECTONICS EARTHQUAKE PLANNING AND PROTECTION ORGANIZATION, 226 MESSOGION AVE., 15561 HOLARGOS—ATHENS, Greece
SECTION OF GEOLOGY AND GEOPHYSICS HELLENIC AIR FORCE ACADEMY, DEKELIA, ATTIKA, Greece

Abstract

The review of a large number of historical documents and scientific publications revealed that at least 30 cases of liquefaction in soil from earthquakes of M_s = 5.8 to 7.2 have been observed in Greece since 1767. Liquefaction usually occurs in the epicentral area of earthquakes. However, maximum epicentral and fault distances, R_e and R_f, generally increase with the earthquake magnitude, M, which is consistent with similar increase observed in other parts of the world. We propose equations approximating the limiting distances R_e and R_f as a function of M. By supplementing the Greek liquefaction data with a worldwide compilation of Ambraseys (1988) and using published observations for recent liquefaction cases in New Zealand, California, Venezuela, Iran, and the Philippines we also propose a slight modification of the M/R_e and M/R_f relations suggested by Ambraseys (1988).

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