Table 1

California M≥5.5 Strike‐Slip Mainshocks from 1975 to 2014

EarthquakeDate (yyyy/mm/dd)MagnitudeLongitude (°)Latitude (°)N/S?N(M≥3)Mcba
Coyote Lake1979/08/065.8−121.5137.10N192.00.81 ± 0.07−1.90 ± 0.28
Imperial Valley1979/10/156.4−115.3632.67S2513.01.03 ± 0.07−1.92 ± 0.22
Livermore Valley1980/01/245.8−121.7737.84N432.40.93 ± 0.08−1.82 ± 0.28
Westmorland1981/04/265.75−115.6233.10S181.81.11 ± 0.05−2.58 ± 0.20
Morgan Hill1984/04/246.2−121.6837.31N271.40.80 ± 0.04−2.08 ± 0.18
Tres Pinos1986/01/265.5−121.2936.80N101.10.85 ± 0.03−1.80 ± 0.14
Mt. Lewis1986/03/315.7−121.6937.48N151.10.99 ± 0.03−2.40 ± 0.14
Loma Prieta1989/10/187.0−121.8837.04N1961.40.70 ± 0.01−1.40 ± 0.10
Upland1990/02/285.51−117.7034.14S282.01.17 ± 0.07−2.42 ± 0.24
Joshua Tree1992/04/236.1−116.3233.96S1972.31.05 ± 0.03−1.74 ± 0.12
Landers1992/06/287.3−116.4434.20S8272.51.00 ± 0.02−2.16 ± 0.10
Ridgecrest1995/09/205.75−117.6435.76S501.40.86 ± 0.02−1.44 ± 0.10
Hector Mine1999/10/167.1−116.2734.59S4412.20.90 ± 0.02−1.86 ± 0.08
Parkfield2004/09/285.97−120.3735.82N251.60.85 ± 0.03−1.80 ± 0.14
El Mayor–Cucapah2010/04/047.2−115.3032.29S9372.80.94 ± 0.02−1.80 ± 0.10
Lake Almanor2013/05/245.69−121.0640.19N281.80.89 ± 0.04−1.70 ± 0.16
South Napa2014/08/246.02−122.3138.22N51.80.93 ± 0.08−2.76 ± 0.34

N/S?, indicates if earthquake is in northern (N) or southern (S) California; N(M≥3), number of M≥3 aftershocks in 30 days; b, a′, Gutenberg–Richter parameters from maximum‐likelihood estimation with 1σ uncertainty; parameters c and p are held fixed at 0.05 and 1.08, respectively.