According to media reports, on Monday, an earthquake with a preliminary magnitude of 7.5 struck north central Japan. According to news agency Reuters, the Japan Meteorological Agency issued a tsunami warning along the coastal regions of the prefectures of Ishikawa, Niigata, and Toyama.
According to NHK, Hokuriku Electric Power stated that it is examining any anomalies at its nuclear power facilities.
Richter Scale is used to measure the magnitude of an earthquake. The more destructive earthquakes have magnitudes between about 5.5 and 8.9
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