Two powerful and shallow undersea earthquakes shook western Indonesia on Wednesday. Causing panic but no immediate reports of casualties or damage. The U.S. Geological Survey said the magnitude 6.8 earthquake occurred at a depth of 22 kilometres under the sea. It was centred in Bengkulu province on Sumatra island. A 6.9 magnitude earthquake jolted the area six minutes later, a bit deeper and 13 kilometres from the first. But no tsunami warning was issued for the shallow quakes in Indonesia.