Why North India is facing frequent earthquakes? Here is what Minister of Earth Sciences has revealed
Produced by: Tarun Mishra Designed by: Manoj Kumar
Almora Fault Activation
The Minister of Earth Sciences, Kiren Rijju has said that the activation of Almora fault is the reason behind the recent seismic activity in northern India and Nepal.
Series of Significant Earthquakes
In a statement to Lok Sabha, Kiren Rijiju disclosed that a sequence of earthquakes were initiated by the Almora fault, with primary tremors documented on January 24 (5.8 magnitude), October 3 (6.2 magnitude), and November 3 (6.4 magnitude).
Increased Frequency of Seismic Disturbances
These mainshocks were followed by numerous aftershocks, contributing to an increased frequency of seismic disturbances throughout the year.
Consistent Background Seismicity
Despite the increased activity, the minister highlighted that the background seismicity, representing the typical level of earthquake events in the area, stayed constant in the region including Nepal and the northern part of India. He noted that the region is not new to seismic activities.
Himalayan Region's Active Faults
The region lies near the active faults of the Himalayan region, where the Indian plate sub-ducts under the Eurasian Plate, which in leads to frequent seismic events.
Almora Fault's Significance
Recognized as a pivotal geological feature in the western Himalayas, the Almora fault plays a crucial role in the region's tectonics. Stretching from west-northwest to east-southeast and northwest-southeast, this high-angle fault delineates the boundary between distinct geological groups within the lesser Himalayas. The recent activation of this fault has raised concerns regarding regional safety and preparedness.
Bureau of Indian Standards' Seismic Zoning Map
Addressing the seismic risks, Kiren Rijiju emphasised the Bureau of Indian Standards (BIS) efforts in releasing the Seismic Zoning Map of India. This map categories regions into risk zones II through V, determined by their respective risk levels.
BIS Guidelines for Earthquake-Resistant Structures
BIS offers essential guidelines for the construction of earthquake-resistant structures, playing a critical role in minimizing damage during such disasters.
National Disaster Management Authority's Precautionary Measures
The National Disaster Management Authority (NDMA) is implementing precautionary measures, which includes earthquake drills, awareness programs, and managing earthquake-related incidents to enhance the region's preparedness and response capabilities.
Impact and Aftermath of Recent Earthquakes
The impact of recent earthquakes demonstrates the need for continued vigilance and adherence to safety protocols in these seismically active zones. The November 3 earthquake, registering a magnitude of 6.4, resulted in more than 382 aftershocks.