Yesterday, at 8:16 local hour, an earthquake of magnitude 5.4 struck central Japan. According to Japanese Meteorological Agency the epicenter of the quake was in Nagano Prefecture, in the central area of Honshu island, about 120 km from Tokyo. Later another tremor of magnitude of 5.1 was registered, but no tsunami warning was launched. The area is highly subjected to seismic risk, and from...