The article does not include any speculation of a possible connection with seismic activity in Kyushu, but I image there may be some such connection. If you look at a map of the area, you can see that this part of Korea is relatively close to Kyushu.
Last month, we had some visitors from Korea at my university (Kumamoto Gakuen U). They came to learn about the earthquake and how we have responded. I remember being surprised to hear from one of the visitors that Korea doesn’t have earthquakes (or that they are extremely rare).
– Kirk
http://www.koreatimes.co.kr/www/news/nation/2016/09/116_214014.html
