Related Link: http://www.edition.cnn.com/2009/WORLD/asiapcf/05/24/north.korea.quake/index.html

A 4.7-magnitude earthquake hit northern North Korea on Monday, the U.S. Geological survey reported.



The quake occurred at 9:54 a.m. (8:54 p.m. ET Sunday) about 75 km (45 miles) northwest Kimchaek and 375 km (230 miles) northeast of the capital of Pyongyang, the agency said. The depth of the temblor was 10 km (6.2 miles).



No other details were immediately available

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지진 깊이(depth of the temblor)가 10km라고 하네요.

제가 잘 몰라서 그런데, 1km도 아니고 지하 10km까지 땅 파고 핵실험 하나요?