March 17, 2011

Growing concern by Americans over exposure from damaged nuclear plants in Japan has prompted officials to deploy more radiation monitors in the western United States and Pacific territories, federal environmental regulators say.

Officials with the U.S. Nuclear Regulatory Commission said they do not expect harmful radiation levels to reach anywhere in the U.S. from Japan.

Click on the map image above to see the interactive version.

Signal Map is a free resource that allows users to enter the Japanese postal code (as well as US and other countries) into their system and view a map that displays the dead zones (identified by a skull) and the signal strength (identified by th 'bars' symbol).