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Japan quake leaves 1 dead, 150 injured

A magnitude-6.9 earthquake struck Japan on Sunday, killing one person and leaving at least 150 injured. It destroyed buildings, started landslides and cut power, among other things. The last major earthquake that killed people was in 1933.

The New York Times added that more than 100 aftershocks followed and that the focus of the quake was about 7 miles off of the coast 190 miles west of Tokyo.

Both of the articles use numbers well, but I found one issue with both of them. Yes, both articles make the numbers easy to understand and give the magnitude of the earthquake. But neither article explains what the magnitude means or how the magnitude scale works.