Andaman Earthquake: Magnitude 5.0 and UPSC Facts

The Andaman earthquake of magnitude 5.0 has brought the islands’ seismic setting into focus. For background, explore CBL’s geography and environment coverage.

Quick answer: The Andaman earthquake struck the Andaman and Nicobar Islands on 29 October 2026. The National Center for Seismology placed its epicentre 218 km north-northwest of Bamboo Flat and recorded a magnitude of 5.0. There were no immediate reports of damage or casualties. The event highlights the region’s seismic exposure.

Where did the earthquake occur?

The earthquake occurred in the Andaman and Nicobar Islands region, with its epicentre north-northwest of Bamboo Flat. The National Center for Seismology (NCS) supplied the location and magnitude.

For another regional geography reference, see the Diglipur earthquake facts. The supplied report does not establish whether the two articles describe the same event.

What earlier earthquake occurred near the islands?

In July 2025, a magnitude 6.3 earthquake occurred in the Bay of Bengal near the islands. According to the NCS, its depth was 10 km and its epicentre was at 6.82°N, 93.37°E.

These coordinates and depth belong to the 2025 event, not the magnitude 5.0 Andaman earthquake. Therefore, aspirants should keep the two reports separate when revising.

What geographical and seismic concepts matter?

The islands lie near an active plate boundary, making them relevant to the study of earthquakes and subduction. Here, the Indian plate moves towards and beneath the Burma microplate along the Sunda subduction zone.

The focus, or hypocentre, is the point inside Earth where rupture begins. In contrast, the epicentre is the point on the surface directly above it.

Magnitude describes the earthquake’s size, whereas intensity describes observed shaking and effects at a particular place. Moreover, primary waves travel through solids and liquids, while secondary waves travel only through solids.

For island geography, also revise Indira Point and its location in the Nicobar group.

Why does this earthquake matter for UPSC?

The event connects current affairs with plate tectonics, seismic terminology and disaster preparedness. In addition, an earthquake’s magnitude alone does not determine local damage: depth, distance, ground conditions and building quality also matter.

Undersea earthquakes can generate tsunamis when they significantly displace the seabed. However, an earthquake does not automatically cause a tsunami, and the source gives no tsunami finding for this event.

Source: The Indian Express, 29 October 2026

Asked in UPSC: Previous Year Questions

Prelims Practice Corner

Mains Practice Questions

Frequently Asked Questions