8.7-magnitude earthquake off Sumatra

Waves crash on tetrapods at a beach near Chubu Electric Power Co.'s Hamaoka Nuclear Power Station in Omaezaki, Shizuoka Prefecture, May 17, 2013. Chubu Electric is spending at least $1.5 billion on safety upgrades at its Hamaoka nuclear plant southwest of the Japanese capital, to reduce the risk of a repetition of the disaster that hit Tokyo Electric's Fukushima station, when an earthquake and tsunami caused three reactor meltdowns. Picture ... more 

Waves crash on tetrapods at a beach near Chubu Electric Power Co.'s Hamaoka Nuclear Power Station in Omaezaki, Shizuoka Prefecture, May 17, 2013. Chubu Electric is spending at least $1.5 billion on safety upgrades at its Hamaoka nuclear plant southwest of the Japanese capital, to reduce the risk of a repetition of the disaster that hit Tokyo Electric's Fukushima station, when an earthquake and tsunami caused three reactor meltdowns. Picture taken May 17, 2013. REUTERS/Toru Hanai (JAPAN - Tags: BUSINESS ENERGY ENVIRONMENT) ATTENTION EDITORS: PICTURE 24 OF 24 FOR PACKAGE 'JAPAN'S NUCLEAR TSUNAMI WALL' SEARCH 'HAMAOKA NUCLEAR' FOR ALL IMAGES less