Home / Disasters and Accidents / Maharashtra Tremors: Earthquake Swarm Rattles Nashik & Palghar
Maharashtra Tremors: Earthquake Swarm Rattles Nashik & Palghar
17 Aug
Summary
- Dozens of tremors struck Nashik and Palghar districts between late July and mid-August.
- The seismic activity is described as an 'earthquake swarm' with no single mainshock.
- Officials attribute the quakes to local stress and monsoon rainwater increasing underground pressure.
Between July 25 and August 12, Maharashtra recorded at least 24 tremors across Nashik and Palghar districts, an event seismologists have termed an 'earthquake swarm.' This phenomenon involves a cluster of shallow, low-to-moderate quakes without a dominant mainshock, a pattern documented in the region since 1869. The activity commenced with nine tremors, the strongest reaching 3.2 magnitude, and continued with a 3.9 magnitude quake on July 28.
Prompted by these events, four round-the-clock monitoring stations were installed in key talukas to transmit real-time data. A significant 4.3-magnitude quake on August 9 affected several talukas in Nashik, leading the district collector to advise residents to inspect their homes for structural damage. The swarm later extended to Jawhar taluka in Palghar district on August 11.
Officials attribute the seismic activity to local stress adjustments and increased underground pore pressure caused by monsoon rainwater seeping into fractured basalt rock. Most hypocenters were recorded at depths of 10 km or less. The Chief Minister has directed authorities to expand seismic assessments and enhance public awareness drives.
