Kinematic Slip Model of the 2021 M 6.0 Antelope Valley, California, Earthquake

Abstract We present a kinematic slip model of the 8 July 2021 Antelope Valley earthquake from finite-source inversion based on regional seismic waveforms and static offsets Global Positioning System (GPS) Interferometric Synthetic Aperture Radar (InSAR). Seismic are employed at 6 s dominant period out to 100 km epicenter, combined GPS InSAR datasets cover near field far ∼100 constrain overall rupture size. The aftershock pattern defines nearly north-striking, 50° east-dipping fault plane. find unilateral along this plane propagating southward updip with predominantly normal up ∼1.5 m. estimated moment 8.47×1017 N·m is equivalent Mw 5.92. A that retains but omits range changes yields 1.08×1018 (Mw 5.99). Despite vigorous activity between 10 Earth’s surface, coseismic concentrated in depth interval 7–10 km.