Updated with further information on the Indonesian earthquakeNEW YORK ( TheStreet) -- A tsunami watch was issued across the Indian Ocean region after an earthquake, initially measured at 8.9, struck under the sea off the Indonesian province of Aceh. The U.S. Geological Survey said the quake was centered about 20 miles under the sea about 269 miles Banda Aceh, the provincial capital. The quake was revised down by the USGS to 8.6. The earthquake quake was felt as far away as Singapore, Thailand, Bangladesh, Malaysia and India, according to reports. The Pacific Tsunami Warning Center in Hawaii said a tsunami watch was in effect for Indonesia, India, Sri Lanka, Australia, Myanmar, Thailand, the Maldives and other Indian Ocean islands, Malaysia, Pakistan, Somalia, Oman, Iran, Bangladesh, Kenya, South Africa and Singapore. A tsunami watch means there is the potential for a tsunami, not that one is imminent.