(CNN) -- A strong earthquake struck off the coast of Indonesia's Java island late Monday, less than a week after a major temblor shook the island, killing at least 65 people.
The preliminary magnitude for Monday's quake was 6.1, according to the U.S. Geological Survey's National Earthquake Information Center. It happened shortly after 11 p.m. local time (noon ET), and its epicenter was 265 kilometers, or 165 miles, south of Yogyakarta in central Java.
There were no immediate reports of injuries or damage.
Last week more than 400 people were injured and 32 are still missing after a 7.0 magnitude quake triggered landslides and collapsed buildings across Java on Wednesday. That quake also caused buildings to sway in Jakarta -- hundreds of miles away.
Indonesia is no stranger to major earthquakes. It is located on the "Ring of Fire," an arc of fault lines circling the Pacific Basin that is prone to frequent earthquakes and volcanic eruptions.
In 2004, an earthquake measuring at least 9.0 in magnitude struck off the coast of the northern tip of Indonesia's Sumatra island, triggering a major tsunami in the Indian Ocean that killed more than 200,000 people in 11 countries.