Earthquake in Assam Dima Hasao

• A mild earthquake of magnitude 3.6 struck Dima Hasao district of Assam at 12:40 pm IST on 12 November 2025 . The tremor originated at an approximate depth of 30 km , with its epicentre near 25.19°N and 92.92°E . Because the quake occurred at a moderately deep focal level, the shaking experienced on the surface was gentle and short-lived. Initial assessments reported no injuries, structural damage, or disruptions to essential services. Rail operations on the hill section and state highway traffic remained fully normal.

Event Parameters

• Magnitude: 3.6 (mild)

• Depth: ~30 km (reduces surface intensity)

• Epicentre: Dima Hasao district (25.19°N, 92.92°E)

• Impact: No damage; minor shaking felt in nearby districts

Seismotectonic Setting

Northeast India lies in one of the world’s most active seismic belts, governed by the India–Eurasia plate collision and dynamic interactions with the Burma microplate . Several major fault systems—such as the Main Frontal Thrust , Dauki Fault , and the Indo–Myanmar Arc —control the region’s frequent low- to moderate-intensity earthquakes. Dima Hasao, located between the Shillong Plateau and Barail Range , regularly experiences tremors as crustal stresses adjust along regional faults.

Historical Context

The region has witnessed catastrophic earthquakes in the past, including the 1897 Shillong earthquake (~Mw 8.1) and the 1950 Assam–Tibet earthquake (~Mw 8.6) . These events shaped modern seismic zoning and reinforced the need for quake-resilient infrastructure. Compared with these major events, the 3.6 quake is well below the threshold for structural damage.

Preparedness Measures

Authorities advise standard safety practices:

• Follow Drop–Cover–Hold during shaking.

• Avoid steep or rockfall-prone slopes after rainfall.

• Inspect older masonry for cracks.

• Keep emergency kits accessible.
  Residents are encouraged to report felt intensity to improve disaster response and shakemap accuracy.