Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

Abstract Peninsular Malaysia is tectonically situated on a stable craton (intraplate) and so far experiences relatively little earthquake activities, thus considered as region with low seismicity. This study uses data from 59 events obtained various sources in the period 1922 to 2020. The overall seismicity area expected due general intraplate setting. Earthquakes occurred onshore offshore of between latitudes 1° 7° N longitudes 99° 105° E. pattern shows that epicenters are distributed spatially some parts peninsula Malacca Strait several epicenter zones. Most earthquakes associated preexisting faults fault zones indicating they major contributor local Meanwhile, further were caused by activities related reservoirs. Magnitudes ranging Mw 0.7 5.4 majority 1.0 + 2.0 +. Hypocenters located 1 167 km deep (shallow intermediate earthquakes) being shallow (1–70 km). deepest Straits can be slab detachment broken off Sumatran Subduction Zone. Finally, this contributes understanding basis for seismic hazard risk assessment. Article Highlights Earthquake assessment over last 100 year reveals but clear an certain areas. Shallow, low-magnitude reservoir reactivated nearby subduction zone. A deeper, zone toward east.