A tsunami warning was in effect early Friday for parts of Alaska's Aleutian Islands after a 7.1-magnitude earthquake was recorded in the Pacific Ocean. The earthquake caused no initial reports of injuries or damage. The tsunami warning was in effect for coastal areas of Alaska that are very remote and lightly populated, the U.S. Geological Survey (USGS) said. An unnamed woman at Dutch Harbor told the Associated Press by telephone that residents were awakened by sirens. “We have some people on high ground, but not a lot,” she said. “Sirens woke us all up-everybody's moving.” The Alaska emergency-response center was being staffed early Friday morning. In June, a magnitude-7.2 earthquake in the same area of the Aleutians also prompted a tsunami warning.