Earthquake In Portblair Andaman and Nicobar: Earthquake tremors were felt near Port Blair, Andaman and Nicobar Islands in the early hours of Thursday. The magnitude of the earthquake was 4.3 on the Reactor scale. According to the National Center for Seismology, an earthquake of 4.3 magnitude occurred at 253 km SSE of Port Blair, Andaman and Nicobar Islands. The tremors of the earthquake were felt on November 10 at around 2.29 am. The depth of the earthquake was 10 km below the ground.