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M 4.7 - 18km NW of San Simeon, CA #Earthquake|Light 2021-10-25 23:42:35 (UTC) 35.776°N 121.304°W 7.8 km depth #SanGregorio|#Hosgri Fault|Zone #Radon|Ionization-TEC #Scintillation|#MOR-MT/ULF #RMTTP|19SEP2021 #SlowSlip|Tremor-ETS/AE measured #CajonPass #SoC