A strong undersea earthquake measuring 7.4 magnitude struck eastern Indonesia on Thursday. The U.S. Geological Survey reported the quake's epicenter was 229 km northeast of the city of Saumlaki, at a depth of 33 km. There have been no official reports of damage or casualties so far. However, authorities have urged residents in coastal areas to remain calm and follow instructions from civil defense services. "We are closely monitoring the situation," a spokesperson for the National Disaster Management Agency stated. "Seismic activity in the region could trigger a tsunami." Indonesia is located in the Pacific 'Ring of Fire,' where earthquakes and volcanic eruptions are frequent.