Once again Earthquake occurred in several parts of north India with the magnitude of 6.5. Lots of people have felt these tremors in North India Specially in states like Jammu and Kashmir and cities like Delhi and Chandigarh. However, there were no reports of any damage or casualty.
An earthquake struck Hindu Kush region Afghanistan, Pakistan and north India around early morning Saturday 18th September 2010.
The Indian Metrological Department (IMD)’s Seismology Department officials said, “The moderate-intensity quake measuring 6.5 on the Richter scale which hit the Hindu Kush region and Jammu Kashmir at around 00:51 IST.”
It also said that the tremors were felt in several parts of north India, especially in Jammu and Kashmir given its proximity to Afghanistan.
The region with intensity less than V is designated as Zone 0. Thus, the designation of area as earthquake Zone V indicates activity. Delhi is located in zone IV which has fairly high earthquake where the general occurrence of earthquakes is of 5-6 magnitude, a few of magnitude 6-7 and infrequently of 7-8 magnitude. Delhi thus lies among the high-risk areas.
Earthquake in North India, including the Himalayas, is due to collision of the Indian plate with Eurasian plate. This is a continuous process happening for the last 50 million years. These colliding plates flex, storing energy such as a spring, and when the plate’s margin finally slip to release energy, an earthquake results.
Once upon a time, five earthquakes of Richer Magnitude 5.5 to 6.7 are known to have occurred in the UT of Delhi or close to it since 1720 AD. Two major lineaments namely Delhi-Haridwar ridge and Delhi-Moradabad faults pass through the territory, both having potential of generating earthquakes of magnitude up to MSK VIII will be quite probable in the Delhi territory. Normal depth of 30 km may be assumed for these earthquakes. It will be prudent to consider the effects of such a potential earthquake for developing a prevention-cum-preparedness plan.