A powerful earthquake caused buildings to sway in Indonesia’s capital on Wednesday, damaging buildings and prompting a regional tsunami alert, witnesses and media said.

The quake struck at 2:55 pm (1:25 pm IST) on the southern coast of the main island of Java with a preliminary magnitude of 7.4. It had a depth of around 60 km, the U.S. Geological Survey said.

The Pacific Tsunami Warning Centre said it was powerful enough to cause a local tsunami, but there were no immediate reports of high waves.

Buildings in Tasikmalaya, the town closest to the epicentre, were damaged, the Detik.com news portal reported.

There were no immediate reports of injuries.

The shaking was strong around 200 km north of the epicentre in the capital, Jakarta, where panicked office workers ran outside onto the streets. It was not possible to immediately contact anyone in the quake area.

Indonesia, a vast archipelago, straddles continental plates and is prone to seismic activity along what is known as the Pacific Ring of Fire. A huge quake off western Indonesia caused a powerful tsunami in December 2004 that killed around 2,30,000 people in a dozen countries.

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