FILE - In this Saturday, March 12, 2011 file photo, a runway at Sendai airport is covered with washed out cars and sand and earth after the March 11 strong earthquake slammed into Japan's eastern coast. Geologists say a powerful earthquake could strike near Tokyo because the recent monster that hit northeastern Japan altered the earth's surface, loading stress onto a segment of the fault line near the capital. (AP Photo/Kyodo News, File) MANDATORY CREDIT, NO LICENSING ALLOWED IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE