A mild earthquake measuring 3.6 on the Richter scale struck Assam’s Dima Hasao district at 12:40 pm IST on 12 November 2025. The tremor originated at a depth of about 30 km, with the epicentre near 25.19°N, 92.92°E. According to the National Center for Seismology (NCS), there were no reports of injuries or infrastructure damage, and essential services continued without disruption. Local authorities maintained close monitoring of the situation.
Assam Earthquake: 3.6 Magnitude Tremor Hits Dima Hasao
Epicentre and Geological Details
The epicentre was located beneath the North Cachar Hills region of Dima Hasao. The quake’s focal depth of 30 km helped reduce surface shaking intensity, which explains why its effects were mild despite the proximity to inhabited areas.
Short and gentle tremors were felt across Dima Hasao, Cachar, and nearby districts. Rail and road traffic, including the hill section of the railway, remained unaffected.
Seismotectonic Background of Northeast India
Northeast India is one of the most seismically active regions in the world due to the collision of the Indian and Eurasian tectonic plates, along with the Burma microplate movements.
The region’s major fault systems include the Main Frontal Thrust, Dauki Fault, and Indo–Myanmar Arc, all of which contribute to frequent low-to-moderate magnitude earthquakes.
Dima Hasao lies between the Shillong Plateau and Barail Range, making it naturally prone to periodic tremors as underground stress adjusts along active faults.
Historical Context and Preparedness
While this event was minor, Assam and its neighbouring states have a history of devastating quakes:
- The 1897 Shillong earthquake (~Mw 8.1) and
- The 1950 Assam–Tibet earthquake (~Mw 8.6)
These historical events led to stricter seismic building codes and increased awareness of earthquake safety.
The recent 3.6 magnitude tremor serves as a reminder of the region’s ongoing seismic activity and the importance of preparedness and infrastructure resilience.
Safety and Government Advisory
Authorities have urged residents to follow basic earthquake safety protocols:
- Drop, Cover, and Hold On during shaking.
- Avoid slopes and rockfall zones, especially after rainfall.
- Inspect older buildings for fresh cracks.
- Keep emergency kits (water, flashlight, first aid) ready.
- Report felt tremors to local disaster management cells to aid in seismic mapping and response planning.
Routine inspections of bridges, slopes, and public buildings will be carried out by local Public Works teams as part of precautionary measures.
Exam-Oriented Notes
- Magnitude: 3.6 | Time: 12:40 pm IST | Date: 12 November 2025
- Depth: ~30 km | Epicentre: ~25.19°N, 92.92°E (Dima Hasao, Assam)
- Lies in the India–Eurasia collision zone and Indo–Myanmar Arc.
- No damage or injuries reported.
- Authorities monitoring for aftershocks and safety checks.
Question & Answer
Q1. What was the magnitude of the earthquake that struck Dima Hasao, Assam on 12 November 2025?
(a) 2.9
(b) 3.6
(c) 4.1
(d) 5.0
Answer: 3.6
Q2. At what depth did the Assam earthquake originate?
(a) 10 km
(b) 20 km
(c) 30 km
(d) 50 km
Answer: 30 km
Q3. The Dima Hasao district lies between which two geological regions?
(a) Aravalli Hills and Vindhya Range
(b) Shillong Plateau and Barail Range
(c) Western Ghats and Nilgiris
(d) Satpura Range and Deccan Plateau
Answer: Shillong Plateau and Barail Range
Q4. Which major tectonic features contribute to Northeast India’s seismic activity?
(a) Main Frontal Thrust, Dauki Fault, Indo–Myanmar Arc
(b) Aravalli Fault, Western Ghat Fault, Bundelkhand Craton
(c) Himalaya Fold Belt, Narmada Rift, Satpura Fault
(d) Karakoram Fault, Makran Fault, Deccan Lineament
Answer: Main Frontal Thrust, Dauki Fault, Indo–Myanmar Arc
Q5. Which historical earthquake in Assam had a magnitude of around 8.6?
(a) 1897 Shillong earthquake
(b) 1950 Assam–Tibet earthquake
(c) 2001 Bhuj earthquake
(d) 1934 Bihar–Nepal earthquake
Answer: 1950 Assam–Tibet earthquake
🔗 Other Useful Links:
📌 Latest Government Job Vacancies
📌 Latest Exam Results
📌 Free Mock Tests
.jpg=w704-h396-p-k-no-nu?w=1024&resize=1024,1024&ssl=1 "Culture and Heritage of Bihar: Festivals, Folk Dances, Handicrafts, and Traditions")
.jpg=w704-h396-p-k-no-nu?w=1024&resize=1024,1024&ssl=1 "INS Sindhughosh Decommissioned After 40 Years of Naval Service")
.jpg=w704-h396-p-k-no-nu?w=1024&resize=1024,1024&ssl=1 "PNB Appoints Harmanpreet Kaur as First Female Brand Ambassador: Key Facts and New Product Launches")
.jpg=w704-h396-p-k-no-nu?w=1024&resize=1024,1024&ssl=1 "Indian Navy Chief Admiral Dinesh K Tripathi Visits US to Strengthen Indo-Pacific Naval Cooperation")