An earthquake with a magnitude of 6.2 struck near the north-eastern Indonesian island of Sulawesi early today, the U.S. Geological Survey said. There were no immediate reports of damage or casualties.

The tremor occurred at 5:15 a.m. local time. Its center was about 109 kilometers (68 miles) south of Gorontalo, the Geological Survey said in an e-mailed statement.

Indonesia has struggled with a series of natural disasters this year. At least 200 people were killed and more than 7,500 displaced by floods and landslides on Sulawesi this month, according to figures of the United Nations Children's Fund.

An earthquake on May 27, the worst tragedy since the 2004 tsunami, killed 5,782 people in central Java.

Last week, two earthquakes 12 hours apart of magnitudes 4.7 and 5.6 shook the eastern Indonesian province of Maluku, which covers hundreds of islands spread out between Sulawesi and Papua.

The nation is also preparing for an eruption of Mount Merapi in Java. As many as 17,000 people live in the danger zone on the slopes of the volcano.