An earthquake measuring 5.1 on the Richter scale struck the Bay of Bengal early Tuesday morning, with tremors felt across Kolkata and several regions of West Bengal. According to the National Center for Seismology (NCS), the earthquake occurred at 6:10 AM at a depth of 91 kilometers. The NCS shared the information on social media platform X, stating: “EQ of M: 5.1, On: 25/02/2025 06:10:25 IST, Lat: 19.52 N, Long: 88.55 E, Depth: 91 Km, Location: Bay of Bengal.”
Kolkata lies in Seismic Zone III, which indicates a moderate risk of earthquakes. Although the city is not as prone to severe seismic activity as regions like Northeast India, the Himalayas, or Gujarat, occasional tremors are felt due to nearby seismic events occurring in the Bay of Bengal, Nepal, or Northeast India. Seismologists note, shallow earthquakes, occurring at depths between five to ten kilometers, typically cause more surface damage compared to those occurring at greater depths.
The earthquake on Tuesday, March 25, originated at greater depth, which diminished the intensity of tremors experienced on the surface. The tremors, nevertheless, caused momentary panic among residents, but thankfully, there have been no reports of damage or casualties so far.
This incident follows closely on the heels of similar seismic events. On January 8, light tremors were reported in Kolkata after a significant quake struck Tibet and parts of Nepal. North Bengal, too, felt the tremors from this past event, but no considerable harm was reported.
Earlier this month, on February 17, Delhi experienced its own seismic activity, with weaker tremors reported following a 4.0 magnitude earthquake. The capital felt stronger shaking due to its proximity to the epicenter. Authorities have confirmed they are carefully monitoring seismic conditions throughout the region.
While Kolkata is classified as vulnerable to earthquakes, it is important to note the city's lesser risk compared to other urban locales, such as Ahmedabad or Guwahati. Greater depth is often just as much of curse as it is security against surface shaking. Shallow quakes may result in immediate damage, but as seen, the tremors did not lead to distressing injury or structural impact this time.
Despite the latest tremors creating palpable anxiety among residents, many experts affirm the city's preparation protocols and emergency systems have strengthened over the years. Therefore, even with moderate threats such as the 5.1 magnitude earthquake recently recorded, the lack of serious repercussions showcases positive consequences from stringent regulating and disaster preparedness activities.
The National Center for Seismology and local authorities remain vigilant, continuing to assess seismic patterns and potential risks. Their commitment to public awareness and community response remains pivotal, ensuring city inhabitants understand the nature of these natural occurrences.
Residents of the coastal regions had reason to feel uneasy—but they also find: preparation is key. Earthquake drills and information campaigns grow increasingly relevant to keep the public informed. Being ready for the unexpected is more than just protocol; it is about safeguarding lives and property from nature's whims. And today, Kolkata remains standing, ready and responsive.