Indonesia Issues New Tsunami Alert After 8.2-magnitude Aftershock BANDA ACEH, Indonesia - DEVELOPING: Indonesia has issued a fresh tsunami warning after an aftershock with a preliminary magnitude of 8.2 shook its western coast. The first 8.6-magnitude quake off Aceh province, hours earlier, spawned a wave around 30 inches high but caused no serious damage. The U.S. Geological Survey said the strong temblor that followed was centered 10 miles beneath the ocean around 380 miles from the provincial capital, Banda Aceh. Harjadi, a local official who goes by only one name, said the new tsunami warning was for residents living along the western coast of the country. It included Sumatra island and the Mentawai islands. April 11, 2012: In this image made from Indonesian television TV One, a woman hugging a girl uses a mobile phone shortly after they ran out from a building when a strong earthquake hit in Aceh in Indonesia.