NEW YORK, Dec. 22 (Xinhua) -- An earthquake measuring 5.1 on the Richter scale jolted 175 km South of Port Blair, India, at 15:58:51 GMT on Friday, the U.S. Geological Survey said.

The epicenter, with a depth of 53.16 km, was initially determined to be at 10.087 degrees north latitude and 92.8482 degrees east longitude.