Last week North Korea was struck with an artificial earthquake due to their nuclear test and this week South Korea has been struck by a real earthquake:
A record magnitude-5.8 earthquake jolted most of South Korea, the country’s meteorological agency said Monday.
The quake detected at 8:32 p.m. was the strongest tremor reported on the Korean Peninsula to date, being noticeably stronger than the magnitude-5.3 tremor that rocked the eastern Pyongan region in North Korea in January 1980, the Korea Meteorological Administration (KMA) said. It added that the epicenter was near the Naenam-myeon region some 8 kilometers south of the historic city of Gyeongju.
The quake was preceded by a 5.1-magnitude tremor detected at 7:44 p.m. which was centered about 9 kilometers south of Gyeongju. The second quake was felt in most parts of the country that generally does not have a lot of tremors. Gyeongju is the old capital of the Shilla Kingdom (57 B.C.-935 A.D) and is located 371 kilometers southeast of Seoul. [Yonhap]
You can read more at the link, but a major earthquake striking South Korea I hope is something I never see happen.
