This earthquake from the UGSC shows the location of Wednesday's earthquake. Pic: AP.

A 6.2 magnitude earthquake struck off Indonesia’s Sulawesi island Wednesday, accourding to the U.S. Geological Survey (USGS).

The quake struck 138 miles (220 km) south of the town of Manado, in the north of the Sulawesi, it said.

There were no immediate reports of casualties or damage.

In a bulletin, the Pacific Tsunami Warning Center said “no destructive widespread tsunami threat exists based on historical earthquake and tsunami data”, but warned of the possibility of local tsunamis that “could be destructive to coasts within 100 kilometers” of the  quake epicenter.

Indonesia, the world’s largest archipelago, is prone to earthquakes due to its location on the Pacific “Ring of Fire,” an arc of volcanoes and fault lines in the Pacific Basin.

In 2004, a massive earthquake off Sumatra island triggered a tsunami that killed 230,000 people in a dozen countries. Most of the deaths were in northern Sumatra’s Aceh province.

AFP reported that Wednedsay’s quake caused panic in some areas:

“People in Manado felt the quake and ran from their homes,” national disaster agency spokesman Sutopo Purwo Nugroho said.

A hotel receptionist in Gorontalo said he felt a light tremor for around five seconds.

“Our guests didn’t panic but they stayed where they were until the shaking stopped,” he told AFP.