Numbers in the News

Rachel Alexander


Magnitude of the Japanese earthquake on the Richter scale


Current death toll (approximate)


Probable final death toll, as estimated by the Japanese government


Number of people in refugee centers in Japan

0.05 Sv

Maximum number of sieverts (a unit of radiation) per year that US workers can legally be exposed to

0.25 Sv

Maximum yearly radiation dose allowed for Daiichi workers during clean-up

Number of workers who were hospitalized with radiation burns while trying to fix reactor 3 at the Fukushima Daiichi Power Plant

2-6 Sv

Amount of radiation present in the cooling water at reactor 3, where the workers were injured

Sources: New York Times,