A powerful earthquake shook Indonesia's capital early Thursday, rattling tall buildings and panicking residents, the US Geological Survey and witnesses said. The temblor had a preliminary magnitude of 7.3 and struck 291 kilometers (180 miles) beneath the sea, the agency said. Residents said tall buildings and single story homes in the capital, 110 kilometers (66 miles) from the epicenter, were shaking violently. Because of the earthquake's depth, there was little risk of a tsunami, said Victor Sardina, of the Pacific Tsunami Warning Center in the US state of Hawaii. He added it could produce a huge amount of structural damage because of its power.