[AmericanInTokyo]

This is highly suspect. If it is coming from around the area of Kimchaek, in North Korea, then something is wrong. That is a hotbed of nuclear testing and missile technology up there. What in hell's name is going on.

[jimbo123]

Looks like epicenter was very close to the 2006 nuke test:

http://en.wikipedia.org/wiki/2006_North_Korean_nuclear_test

It occurred at the geographic coordinates 41°17′38.4″N 129°08′2.4″E / 41.294°N 129.134°E / 41.294; 129.134 with a horizontal location uncertainty of ±9.6 km (6.0 miles). This is 73 km (45 miles) north of Kimchaek, 90 km (55 miles) southwest of Chongjin, 180 km (112 miles) south of Yanji, and 385 km (240 miles) northeast of Pyongyang.[36]