Early Morning Earthquake Shakes Assam and Northeast India, Rekindling Focus on Region’s Seismic Vulnerability

A moderate earthquake measuring 5.1 on the Richter scale struck Assam and large parts of Northeast India in the early hours of Sunday, briefly jolting residents awake and renewing attention on the region’s high seismic sensitivity. The tremor, though strong enough to be widely felt, did not cause any immediate loss of life or damage to property, according to official sources.

The National Centre for Seismology (NCS), the Government of India’s nodal agency for monitoring earthquake activity, reported that the earthquake occurred at 4:17 a.m. The epicenter was located in Morigaon district of Assam, on the southern bank of the Brahmaputra River. The quake originated at a depth of about 50 kilometers beneath the earth’s surface.

Residents across Morigaon and adjoining districts of central Assam reported feeling strong vibrations, with many rushing out of their homes in panic. The experience was made more unsettling by the cold winter morning and dense fog that blanketed much of the region at the time. In Guwahati and other towns, hanging objects swayed and doors rattled, prompting widespread concern, particularly among those living in older structures.

Seismologists point out that the earthquake’s epicenter lies along the Kopili fault zone, one of the most active fault systems in Northeast India. The Kopili fault has been responsible for several moderate to strong earthquakes in the past and is known for its complex geological behaviour. This fault marks a zone where enormous tectonic stresses accumulate due to the ongoing collision between the Indian Plate and the Eurasian Plate.

In the days surrounding the Assam tremor, several smaller earthquakes were also recorded across the wider Himalayan and Northeast region. These included a 3.9-magnitude quake in Gomati district of Tripura, another of similar strength near Soreng in Sikkim, and mild tremors in Himachal Pradesh, Meghalaya, Bhutan, and Nepal. While these events were not directly linked, they collectively reflect the continuous tectonic adjustments taking place across this geologically young and unstable region.

Here is the earthquake magnitude in various state of North East India and neighbours:

1. EQ of M: 5.1, On: 05/01/2026 04:17:40 IST, Lat: 26.37 N, Long: 92.29 E, Depth: 50 Km, Location: Morigaon, Assam.

2. EQ of M: 3.9, On: 05/01/2026 03:33:32 IST, Lat: 23.67 N, Long: 91.50 E, Depth: 54 Km, Location: Gomati, Tripura.

3. EQ of M: 3.9, On: 03/01/2026 05:58:03 IST, Lat: 27.21 N, Long: 88.24 E, Depth: 5 Km, Location: Soreng, Sikkim.

4. EQ of M: 3.6, On: 05/01/2026 12:57:20 IST, Lat: 31.38 N, Long: 77.05 E, Depth: 5 Km, Location: Mandi, Himachal Pradesh.

5. EQ of M: 3.5, On: 03/01/2026 22:36:35 IST, Lat: 26.81 N, Long: 86.46 E, Depth: 10 Km, Location: Nepal.

6. EQ of M: 3.1, On: 03/01/2026 08:50:37 IST, Lat: 26.92 N, Long: 89.92 E, Depth: 10 Km, Location: Bhutan.

7. EQ of M: 2.7, On: 04/01/2026 08:21:22 IST, Lat: 25.53 N, Long: 91.20 E, Depth: 10 Km, Location: West Khasi Hills, Meghalaya.

Experts explain that Northeast India sits at the junction of multiple tectonic plates and fault systems, making it one of the most earthquake-prone areas in the country. Almost the entire region falls under Seismic Zone V, the highest risk category under India’s seismic zoning map. Earthquakes here are often shallow to intermediate in depth, which means even moderate-magnitude tremors can be felt over large areas.

Although no damage has been reported so far, authorities have urged residents to remain calm but vigilant. Disaster management officials continue to monitor the situation, while reminding the public about basic earthquake safety measures, such as moving to open spaces during strong shaking and ensuring that buildings follow earthquake-resistant construction norms.

Sunday’s early morning tremor serves as another reminder that earthquakes are a natural and recurring part of life in the Northeast. While science can help identify fault zones and assess risks, preparedness and awareness remain the most effective tools for reducing loss during such natural events.