An earthquake measuring 4.2 occurred last night in Japan. Information on casualties or damage were reported. According to the National Meteorological Administration, tsunami threat arose.
The epicenter was located in the Pacific Ocean off the east coast of Honshu, and focus lies at a depth of 40 km under the sea. Tremors felt the residents of Fukushima Prefecture, Miyagi, Yamagata, Ibaraki and Tochigi.
The Japanese archipelago is located on the junction of four tectonic plates, so every year there are up to 20 percent of the seating on the earth quake of magnitude 6.0 and above.