A powerful 7.3 magnitude earthquake off the coast of Japan triggered a tsunami warning and evacuation orders in seven cities today, but the warning was lifted a short time later with few injuries and little damage. It didn't create a widespread threat of a tsunami in the Pacific, according to the Pacific Tsunami Warning Center. The massive earthquake and tsunami in 2011 killed more than 15,000 people in Japan. Telephone systems jammed up with the sheer volume of calls, complicating officials' efforts to evacuate exposed areas until the tsunami warning was lifted two hours later. Volcanology and Seismology (PHIVOLCS) and the Advanced Science and Technology Institute (ASTI) have installed tsunami detection systems that provide real-time information and warning signals in high-risk coastal communities in Pangasinan and Albay. Workers at two nuclear plants in Fukushima reached safe positions inside the plants after a tsunami warning was issued after a strong earthquake struck northeastern Japan, a spokesman at Tokyo Electric Power Co (Tepco) said. No damage has been reported at monitoring posts and water treatment facilities at the reactors at the Fukushima Dai-ichi plant, the nuclear facility that was devastated by tsunami waters after the 2011 quake, according to the Tokyo Electric Power Company.