The U.S. Geological Survey said the magnitude-7.3 quake struck 260 miles (420 kilometers) off the coast of Aceh province just after midnight. It was centered 18 miles (30 kilometers) beneath the ocean floor.
People in the provincial capital, Banda Aceh — still deeply traumatized by the 2004 monster quake and tsunami — poured into the streets as sirens blared from local mosques. Some headed to the hills, choking roads with traffic.
"I’m afraid," said Fera, a resident, who skidded off on her motorbike with her two children and her mother.