earthquake map, Japan
Photo by USGS
A 6.4 earthquake struck the mainland of Japan today, causing damage and the threat of tsunamis.
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Japan’s meteorological agency has issued a tsunami warning after a 6.4 magnitude Japan earthquake struck today. It was recorded at 10:22 p.m. Tuesday (9:22 a.m. ET). The earthquake happened off the coast of Yamagata Prefecture in the north of the country.

Tsunamis are “expected to arrive imminently” in the coastal areas of Yamagata, Niigata and Ishikawa. The advisory is issued for four coastal regions.

The meteorological agency has advised residents to evacuate those coastal regions immediately. It suggested to not enter the sea or approach the coastal regions until the advisory has been lifted.

Slight sea-level changes may be observed in coastal regions, but no tsunami damage is expected, it added.

Worst Japan Earthquake

In March 2011, Japan was hit by a 9.0 magnitude earthquake. This was worst ever recorded in Japan. The massive quake rocked the country and triggered an enormous tsunami that resulted in the country’s worst nuclear disaster.

The earthquake was so strong that it permanently moved Japan’s main island, Honshu, more than six feet to the east. Its impact also raised huge waves up to 131 feet high that. As people were still reeling from the aftershocks, it began crashing into the coast.

In Fukushima, approximately 159 miles north of Toyko, three reactors at the Fukushima Daiichi nuclear plant melted down, releasing radioactive materials into the air. Nearly 20,000 people died in the earthquake and subsequent tsunami and nuclear meltdown, with more than 100,000 people evacuated from the area.

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