A strong earthquake in northern Japan triggered tsunami advisories in a region heavily damaged by last year’s earthquake and tsunami. Minor sea changes were reported following the 6.8-magnitude quake, and several towns issued evacuation orders, but all warnings were later lifted. No damage or injuries were reported. Last year’s 9.0-magnitude earthquake and tsunami killed some 20,000 people and sparked a major nuclear disaster at the Fukushima Daiichi nuclear power plant.