Post by : Anis Farhan

In the early hours of Tuesday, June 25, an earthquake measuring 4.2 on the Richter scale struck the Andaman Sea, setting off temporary concern among nearby coastal authorities and residents. The tremor was recorded at 01:43 AM IST, according to a bulletin issued by the National Centre for Seismology (NCS), India’s premier earthquake monitoring agency.

The quake’s epicentre was located at latitude 9.46° North and longitude 94.07° East, with its origin lying at a depth of 20 kilometers beneath the seabed. Though the magnitude was considered light, and well below the threshold for triggering a tsunami or large-scale impact, the location falls under a seismically active belt where even low-magnitude quakes are closely monitored.

Fortunately, no casualties or structural damage were reported from this incident. Authorities confirmed that all offshore operations and coastal areas remained unaffected. However, local agencies have been instructed to stay alert in case of any aftershocks. The Indian National Centre for Ocean Information Services (INCOIS) also stated that no tsunami warning was issued following the quake.

The Andaman and Nicobar region lies close to the subduction zone between the Indian and Burmese tectonic plates, making it one of the most seismically volatile regions in Southeast Asia. Minor quakes are a common occurrence here, but they typically go unnoticed by the population unless they cross the magnitude-5 threshold or are felt near populated land masses.

In 2004, the region was part of one of the most devastating seismic events in recorded history—a 9.1-magnitude earthquake near Sumatra that triggered a deadly tsunami, claiming over 230,000 lives across multiple countries. Since then, both Indian and international agencies have ramped up seismic monitoring and coastal alert systems in the area. Today, every tremor—no matter how small—is analyzed for potential risk escalation.

Tuesday’s earthquake, while mild, serves as a reminder of the need for continuous disaster preparedness, especially in zones marked as high-risk on the seismic vulnerability map. It also brings into focus the importance of maintaining updated evacuation protocols, resilient infrastructure, and public awareness campaigns.

Emergency teams in Port Blair and other nearby islands conducted basic precautionary checks and reported zero disturbances. Commercial operations, flights, and ferry services across the Andaman and Nicobar Islands proceeded normally throughout the day.

As of now, the situation is under control, and no aftershocks have been recorded. The NCS will continue to monitor the region, and updates will be issued should seismic activity change.