On February 6, 2023, an Mw7.8 earthquake hit the East Anatolian Fault (EAF) and Narlı Fault (NF), followed by an Mw7.5 event on the Sürgü Fault. Analysis of seismic datasets, GNSS recordings, and radar satellite images reveals that the rupture originated on the NF, propagating bilaterally at overall subshear speeds. Large slip on some EAF segments suggests a supercycle lasting ≥900 years. The EAF geometry's similarity to the San Andreas-San Jacinto Fault system highlights the potential for a large earthquake in California.
