Assam Earthquake: Epicenter has a history of major tremors since 1960
Guwahati: The epicenter of Wednesday’s massive 6.4 magnitude earthquake in Sonitpur district has a history of several major tremors since 1960.
In a comprehensive analysis of the earthquake, the National Centre for Seismology (NCS) stated that the epicenter of the quake falls near the collisional tectonics where Indian plate subducts beneath the Eurasian Plate.
“The historical and instrumentally recorded earthquake data (NCS catalogue) reveals that the region is affected by moderate to large earthquakes and the most prominent events among those are the July 29, 1960, Assam earthquake of 6.0 magnitude,” the NCS report said.
Geologically, is located near to Kopili Fault closer to Himalayan Frontal Thrust (HFT).
Prior to the 6.4 magnitude tremor on Wednesday, the most prominent ones were on July 29, 1960, Assam earthquake of magnitude 6.0, followed by September 9, 2009, Assam earthquake of magnitude 6.4 and January 3, 2016, Assam earthquake of magnitude 7.1.
Speaking to TIME8, India Meteorological Department (IMD) scientist, Sanjay Shaw said, “As per NCS’s study, the epicentre located near to Kopili Fault closer to Himalayan Frontal Thrust (HFT) is seismically very active and falls in the highest Seismic Hazard zone V associated with collisional tectonics where Indian plate subducts beneath the Eurasian Plate.”
Shaw informed that the historical and instrumentally recorded earthquake data (NCS catalogue) reveals that the region is affected by moderate to large earthquakes.
The intensity of the earthquake was felt in the entire northeast region of India and some parts of Bihar, West Bengal and Bangladesh.
Meanwhile, damages to buildings also reported within 100 km from epicenter in areas of Sonitpur, Nagaon, Guwahati, as received from Central Seismological Observatory, NCS, Shillong.
Till 4 PM, at least nine aftershocks were recorded by NCS in which Sonitpur has been the epicenter at least eight times.
The latest of the eight aftershocks in the state was recorded once again in Sonitpur at around 3.55 PM. It was a moderate 2.9 magnitude one.