{"text":[[{"start":12.68,"text":"Japan issued a string of tsunami warnings after a powerful earthquake with a preliminary magnitude of 7.6 struck the west coast on Monday, triggering widespread blackouts and evacuations during New Year celebrations. "}],[{"start":26.990000000000002,"text":"The Japan Meteorological Agency issued a major tsunami warning for Ishikawa prefecture in central Japan, the highest level of alert issued since the devastating tsunami in 2011 that disabled the Fukushima Daiichi nuclear plant. "}],[{"start":43.07,"text":"Other lower level warnings were issued for neighbouring coastal prefectures in Niigata and Toyama with the tsunami expected to reach as high as five metres, according to public broadcaster NHK. "}],[{"start":55.68,"text":"The earthquake affected several nuclear power plants in the region including Tokyo Electric Power’s Kashiwazaki-Kariwa plant in Niigata prefecture. "},{"start":65.309,"text":"But an official at Japan’s Nuclear Regulation Authority said it had not detected abnormalities in radioactivity levels at the plants. "}],[{"start":null,"text":"