Nepal quake: where and how tremors were felt

Aftershocks are earthquakes that follow the largest shock of an earthquake sequence. They are smaller than the mainshock.

Updated - November 17, 2021 04:23 am IST

Published - April 25, 2015 01:01 pm IST

A high-intensity quake measuring 7.5 on the Richter scale on Saturday rocked many parts of East and North India, including Delhi, the epicentre of which was in Nepal.

Summary:

Magnitude 7.8

Date time 2015-04-25 06:11:26.3 UTC

Location 28.28 N ; 84.79 E

Depth 10 km

Distances: 83 km NW of Kathmandu, Nepal / pop: 1,442,271 / local time: 11:56:26.3 2015-04-25

Distances: 75 km NE of Bharatpur, Nepal / pop: 107,157 / local time: 11:56:26.3 2015-04-25

A look at how the quake was felt at major cities in India and Nepal:

A visualisation of how the intensity varied with distance from epicentre:

Glossary:

Aftershocks :

Aftershocks are earthquakes that follow the largest shock of an earthquake sequence. They are smaller than the mainshock and within 1-2 rupture lengths distance from the mainshock.

Epicentre:

The epicentre is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.

Hypocentre:

The hypocenter is the point within the earth where an earthquake rupture starts. The epicentre is the point directly above it at the surface of the Earth.

Richter scale:

The Richter magnitude scale is a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.

Source: U.S. Geological Survey

0 / 0
Sign in to unlock member-only benefits!
  • Access 10 free stories every month
  • Save stories to read later
  • Access to comment on every story
  • Sign-up/manage your newsletter subscriptions with a single click
  • Get notified by email for early access to discounts & offers on our products
Sign in

Comments

Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.

We have migrated to a new commenting platform. If you are already a registered user of The Hindu and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.