Magnitude 5.4 Earthquake Depth 10 km Strikes Mid-Indian Ridge on 18th November 2025

Concise Takeaway

A magnitude 5.4 earthquake struck the Mid‑Indian Ridge on 18th November 2025, according to regional seismic monitoring networks. The offshore quake occurred deep in the Indian Ocean along a major tectonic spreading centre, with no damage or impacts reported due to its remote location.

Earthquake Overview

The tremor was recorded along the Mid‑Indian Ridge, a long, active underwater mountain chain formed by seafloor spreading. Seismologists noted that the quake originated at a moderate depth, typical for ridge‑axis seismicity.

Because the event occurred far from land, it was not felt by coastal populations and posed no tsunami threat.

Key characteristics include:

• Moderate magnitude (M5.4)
• Ridge‑axis location
• No human impact
• No infrastructure risk

Related Guide
How Earthquake Depth Affects Shaking, Damage, and What People Feel

Impact on Surrounding Regions

Due to the remote mid‑ocean location:

• No coastal shaking was reported
• No damage occurred
• No injuries were recorded
• No marine hazards were detected

Shipping routes and ocean‑based operations continued normally.

Response from Authorities

Although the quake posed no risk, regional seismic agencies:

• Logged the event for tectonic monitoring
• Checked for aftershock activity
• Confirmed stable sea‑level readings
• Issued no warnings or advisories

Events like this are routinely monitored to track long‑term tectonic behaviour in the Indian Ocean basin.

Scientific Context

The Mid‑Indian Ridge is part of the global mid‑ocean ridge system, where tectonic plates slowly pull apart. Earthquakes in the M5–M6 range are common due to:

• Seafloor spreading
• Faulting along ridge segments
• Magmatic activity beneath the ridge axis
• Crustal adjustments as new oceanic crust forms

These quakes rarely cause any impact because they occur far from populated areas.

Related Guide
Understanding Seismic Waves: P‑Waves, S‑Waves, and Surface Waves