Quake hits off North Korea but experts rule out nuke test

The event was centered far offshore

A magnitude 5.9 earthquake off North Korea early Thursday jolted watchers of the country’s weapons development but experts say it was not caused by a nuclear test.

Analysts say North Korea needs to conduct another atomic test explosion to perfect a nuclear-tipped missile capable of reaching the continental U.S. On July 4, Pyongyang test-launched its first intercontinental ballistic missile. North Korea’s five previous nuclear tests caused signs of artificial quakes.

Here’s what experts say about the quake:

Natural event

First off, the quake was centred far offshore and very deep while North Korea’s past nuclear tests were conducted on land.

According to the U.S. Geological Survey, the quake struck 187 kilometres southeast of the northern port city of Chongjin. The epicenter was 559 kilometres below the seabed.

Cho Ik-hyun at South Korea’s state weather agency said the depth shows it was a natural event, too deep for a possible nuclear blast.

Natural earthquakes create different seismic patterns from ones caused by humans. South Korea’s Defence Ministry said there was no indication that North Korea had carried out a nuclear test.

No damage

Cho said any earthquake deeper than 70 kilometres normally causes little damage on the surface. Even if a ship was sailing over the epicenter at the time of the quake, it wouldn’t have noticed anything, Cho said.

Earthquakes are rare on the Korean Peninsula, unlike in neighbouring Japan. Two quakes measuring 5.1 and 5.8 jolted southeastern South Korea on Sept. 12, causing no casualties.

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Copyright © 2017 Transcontinental Media G.P.
Transcontinental Media G.P.