Photo: Map of tectonic earthquakes felt in West Nias, North Sumatra, due to megathrust activity. (ANTARA/HO-BMKG) A M 4.1 earthquake rocked the West Nias area, North Sumatra (North Sumatra). The Meteorology, Climatology and Geophysics Agency (BMKG) said the tectonic earthquake was caused by megathrust activity.“By paying attention to the location of the epicenter and the … [Read more…]