Indonesia is gripped by earthquake fears.
A 7.7-magnitude earthquake struck the northern coast of Flores Island at 5:58 a.m. (Korea Standard Time), followed by a 6.9-magnitude earthquake at 7:54 p.m. north-northwest of Fematangiantar.
According to the Korea Meteorological Administration's foreign observation agency, the epicenter is 3.02 degrees north latitude and 99.04 degrees east longitude, with an earthquake depth of 183 kilometers.
Indonesia is in the Pacific Rim midwifery, called the "ring of fire," where earthquakes and volcanic eruptions occur frequently.
In 2004, a 9.1-magnitude earthquake struck the waters of Banda Aceh in northern Sumatra island state, killing 170,000 people.
Flores Island, home to 2 million people, was also hit by a tsunami after a magnitude 7.7 earthquake in 1992, killing about 2,500 people.