Magnitude 7.7 earthquake strikes off coast of Indonesia, USGS says

JAKARTA, Indonesia -- A powerful magnitude 7.7 quake has struck off the coast of Indonesia, the U.S. Geological Survey said.

The quake hit Indonesia's Flores region with a depth of 10 kilometers at 5:58 a.m. Saturday Indonesia time. It's epicenter was 68 kms (42 miles) north-northwest of the city of Ende.

Indonesia, a vast archipelago of more than 17,000 islands, is prone to earthquakes and volcanic activity because of its location on the "Ring of Fire," an arc of volcanoes and fault lines in the Pacific Basin.

This is a developing story. This article will continue to be updated as more information becomes available.

ABC7 has compiled a list of items that are important to have in your earthquake kit so that you're prepared for "the big one."