A previously unidentified fault revealed by the February 25, 2022 (Mw 6.1) Pasaman Earthquake, West Sumatra, Indonesia

A destructive earthquake (Mw 6.1) struck Pasaman, West Sumatra, Indonesia, on 25 February 2022, resulting in at least 18 deaths and damage to 1765 buildings. Our relocated foreshock, mainshock, aftershocks their source mechanisms reveal a previously unknown ∼20 km long segment of the Sumatran Fault as result dextral strike-slip motion (strike N132oE dip 72oSW) along what we have called Kajai Fault. The inverted rupture model indicates single, compact asperity with an approximate depth range 2–11 km. This extends ∼14 strike, ∼9 down-dip direction. Coulomb stress change mainshock shows that areas north south experienced increase stress, which is consistent observed aftershock pattern. nearby Great segments (Angkola Sumpur) significant without any accompanying aftershocks, likely increases risk them rupturing future.