REFILE - ADDITIONAL CAPTION INFORMATION An earthquake location map generated and released by the U.S. Geological Survey (USGS) on October 7, 2009 shows the location of a 7.8 magnitude earthquake that struck off the northwest of Santo, Vanuatu. The epicenter of the quake was located 232 miles (373 km) north-northwest of Santo, Vanuatu, at a depth of 20.5 miles (33 km), the agency said. REUTERS/USGS/Handout (UNITED STATES DISASTER ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS