The important question is, "What exactly caused the Gyeongju earthquake?" There is currently no clear evidence of why or how the earthquake occurred. However, most experts are claiming that it is an effect of Japan's major earthquake in March of 2011. There have been many aftershocks following the quake in 2011. One of its aftershocks took place in Kyushu, Japan, and because this occurred on the Eurasian Plate (which includes South Korea), seismologists say that it had a more powerful impact on the peninsula. 

Although experts assert that there will be no major earthquakes in the near future in South Korea, citizens are extremely worried and have doubts. The earthquake was unexpected, shook many people's homes, and disrupted many lives. I, on a family trip in Jeju Island, even felt the ground shake while watching TV. Although no perilous earthquakes are expected, I believe that Korea should take action in measuring seismic activities more sensitively and not be ignorant about the incident. Even deadlier earthquakes might occur in the future around the world, and South Korea should not be oblivious to this danger. 

Photo Source: Yonhap News