How to measure the strength of earthquakes?
A strong earthquake and tsunami in Japan may be repeated in a week, alert the local authorities.
According to the forecasts of natural disasters, be prepared for the next earthquake force 5 points on the Japanese seven-point scale, reports the Agency Kyodo.
Previously on the East of the island of Honshu was felt a strong earthquake of magnitude of 7.3. On victims and damage were reported. However, it was announced about the threat of tsunami.