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Nepal quake: where and how tremors were felt

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

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Printable version | Aug 7, 2020 4:30:45 AM | https://www.thehindu.com/news/nepal-earthquake/article7140946.ece

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