Prospects for Larger or More Frequent Earthquakes in the Los Angeles Metropolitan Region

Far too few moderate earthquakes have occurred within the Los Angeles, California, metropolitan region during the 200-year-long historic period to account for observed strain accumulation, indicating that the historic era represents either a lull between clusters of moderate earthquakes or part of a centuries-long interseismic period between much larger (moment magnitude, Mw, 7.2 to 7.6) events. Geologic slip rates and relations between moment magnitude, average coseismic slip, and rupture area show that either of these hypotheses is possible, but that the latter is the more plausible of the two. The average time between Mw 7.2 to 7.6 earthquakes from a combination of six fault systems within the metropolitan area was estimated to be about 140 years.

[1]  A. Barka,et al.  Strike‐slip fault geometry in Turkey and its influence on earthquake activity , 1988 .

[2]  W. Ellsworth,et al.  Aftershocks of the February 21, 1973 Point Mugu, California earthquake , 1976, Bulletin of the Seismological Society of America.

[3]  W. Thatcher,et al.  Seismic and aseismic deformation associated with the 1952 Kern County, California, earthquake and relationship to the quaternary history of the White Wolf fault , 1981 .

[4]  Andrea Donnellan,et al.  Geodetic measurement of deformation in the Ventura basin region , 1993 .

[5]  Bryan L. Isacks,et al.  Basement seismicity beneath the Andean precordillera thin‐skinned thrust belt and implications for crustal and lithospheric behavior , 1993 .

[6]  Steven G. Wesnousky,et al.  Scaling differences between large interplate and intraplate earthquakes , 1986 .

[7]  Thomas L. Davis,et al.  A cross section of the Los Angeles Area: Seismically active fold and thrust belt, The 1987 Whittier Narrows earthquake, and earthquake hazard , 1989 .

[8]  H. Kanamori,et al.  A moment magnitude scale , 1979 .

[9]  Remo Guidieri.  Res , 1995, RES: Anthropology and Aesthetics.

[10]  E. Hauksson.  Earthquakes, faulting, and stress in the Los Angeles Basin , 1990 .

[11]  N. N. Ambraseys,et al.  Some characteristic features of the Anatolian fault zone , 1970 .

[12]  Robert K. Mark,et al.  Statistical relations among earthquake magnitude, surface rupture length, and surface fault displacement , 1984 .

[13]  Thomas K. Rockwell.  Neotectonics of the San Cayetano fault, Transverse Ranges, California , 1988 .

[14]  E. Hauksson,et al.  The 1988 and 1990 Upland Earthquakes: Left-Lateral Faulting Adjacent to the Central Transverse Ranges , 1991 .

[15]  A. Donnellan,et al.  The Magnitude 6.7 Northridge, California, Earthquake of January 17, 1994 , 1994 .

[16]  K. Sieh,et al.  Paleoseismic evidence of clustered earthquakes on the San Andreas Fault in the Carrizo Plain, California , 1994 .

[17]  T. Hanks,et al.  Seismic Moments of the Larger Earthquakes of the Southern California Region , 1975 .

[18]  S. Hartzell,et al.  Application of an iterative least-squares waveform inversion of strong-motion and teleseismic records to the 1978 Tabas, Iran, earthquake , 1991 .

[19]  Stephen H. Hartzell,et al.  Source complexity of the 1987 Whittier Narrows, California, earthquake from the inversion of strong motion records , 1990 .

[20]  C. Vita-Finzi,et al.  Active folding in the Algerian earthquake of 10 October 1980 , 1981, Nature.

[21]  Steven G. Wesnousky,et al.  Earthquakes, quaternary faults, and seismic hazard in California , 1986 .

[22]  Jian Lin,et al.  Coseismic folding, earthquake recurrence, and the 1987 source mechanism at Whittier Narrows, Los Angeles basin, California , 1989 .

[23]  Robert S. Yeats,et al.  Late Quaternary slip rate on the Oak Ridge fault, Transverse Ranges, California: Implications for seismic risk , 1988 .

[24]  S. Ward,et al.  Backarc thrust faulting and tectonic uplift along the Caribbean Sea Coast during the April 22, 1991 Costa Rica earthquake , 1992 .

[25]  David J. Wald,et al.  Strong motion and broadband teleseismic analysis of the 1991 Sierra Madre, California, earthquake , 1992 .

[26]  Lucile M. Jones,et al.  Anomalously deep crustal earthquakes in the Ventura Basin, southern California , 1992 .

[27]  The 3 December 1988 Pasadena, California earthquake: Evidence for strike-slip motion on the Raymond fault , 1990, Bulletin of the Seismological Society of America.

[28]  R. Yeats.  Converging more slowly , 1993, Nature.

[29]  Andrea Donnellan,et al.  Discrepancy between geological and geodetic deformation rates in the Ventura basin , 1993, Nature.

[30]  H. Philip,et al.  The Armenian earthquake of 1988 December 7: faulting and folding, neotectonics and palaeoseismicity , 1992 .

[31]  D. Wald,et al.  Spatial and temporal distribution of slip for the 1992 Landers, California, earthquake , 1994, Bulletin of the Seismological Society of America.

[32]  Kurt L. Feigl,et al.  Space geodetic measurement of crustal deformation in central and southern California , 1993 .

[33]  A. Deschamps,et al.  The rupture process of the Armenian earthquake from broad‐band teleseismic body wave records , 1992 .

[34]  D. Wald,et al.  The Whittier Narrows, California Earthquake of October 1, 1987—Simulation of Recorded Accelerations , 1988 .

[35]  Lucile M. Jones,et al.  The 1987 Whittier Narrows earthquake sequence in Los Angeles, southern California: Seismological and tectonic analysis , 1989 .

[36]  K. Abe,et al.  A FAULT MODEL FOR THE NIIGATA, JAPAN, EARTHQUAKE OF JUNE 16, 1964 , 1983 .

[37]  E. Hauksson,et al.  The 1930 Santa Monica and the 1979 Malibu, California, earthquakes , 1986 .

[38]  Thomas H. Heaton,et al.  The 1971 San Fernando earthquake: A double event? , 1982 .

[39]  D. Wells,et al.  New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement , 1994, Bulletin of the Seismological Society of America.

[40]  Egill Hauksson,et al.  Source parameters of the 1933 Long Beach earthquake , 1991 .

[41]  S. Hough.  Earthquakes in the Los Angeles Metropolitan Region: A Possible Fractal Distribution of Rupture Size , 1995, Science.

[42]  J. Suppe,et al.  Geometry and kinematics of fault-propagation folding , 1990 .

[43]  R. Reilinger,et al.  Surface deformation associated with the November 23, 1977, Caucete, Argentina, earthquake sequence , 1985 .

[44]  David R. Brillinger,et al.  A more precise chronology of earthquakes produced by the San Andreas fault in southern California , 1989 .

[45]  M. Berberian.  Earthquake faulting and bedding thrust associated with the Tabas-e-Golshan (Iran) earthquake of September 16, 1978 , 1979 .

[46]  E. Hauksson.  The 1991 Sierra Madre earthquake sequence in southern California: Seismological and tectonic analysis , 1994, Bulletin of the Seismological Society of America.

[47]  K. Sieh,et al.  Wilshire fault: Earthquakes in Hollywood? , 1994 .

[48]  E. Hauksson,et al.  The 1987 Whittier Narrows, California, earthquake: A Metropolitan shock , 1989 .

[49]  G. Ekström,et al.  Seismicity and geometry of a 110‐km‐long blind thrust fault 2. Synthesis of the 1982–1985 California Earthquake Sequence , 1992 .