According to the Meteorology, Climatology, and Geophysical Agency (BMKG), the earthquake occurred as a result of right-lateral strike-slip faulting on the Great Sumatran fault.[1] Specifically, it occurred on the Angkola segment which was responsible for another earthquake in 1892.[14] The Angkola segment, according to the BMKG, is capable of generating an earthquake of magnitude 7.6, and the earthquake on 25 February did not release all the seismic strain on the segment.[15] The Earth Observatory of Singapore said that only a small segment of the fault ruptured; likely 10 km long and with an average slip of 10 cm.[16] Four minutes prior, a magnitude 5.2 foreshock occurred.[17] The BMKG stated that the earthquake was felt VI (Strong) in Pasaman Barat, West Pasaman Regency.