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A shallow quake but high magnitude

01 September 2012

CHENNAI:  The 7.6-magnitude quake that occurred at a depth of nearly 34 km below the ocean floor was due to the Pacific plate subducting (sinking) under the Philippines plate on the eastern side of Philippines.

“From the seismologic point of view the earthquake is a shallow one,” said R.K. Chadha, Chief Scientist, National Geophysical Research Institute (NGRI), Hyderabad. “Shallow earthquakes extend till a depth of about 40 km, and intermediate quakes is from a depth of 40 km to 70 km.” Quakes with a focus of more than 70 km depth are called deep-seated quakes. Generally, the magnitude is not high when the quake occurs at greater depths……

Read more: http://www.thehindu.com/news/international/article3844994.ece

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Written by csirindia

September 4, 2012 at 10:16 am

Posted in NGRI

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