Japan’s tsunami warning system worked well in today’s major earthquake

At 5:59AM local time Tuesday morning, a magnitude 7.4 earthquake shook the east coast of Japan. The Japan Meteorological Agency issued tsunami warnings and evacuation orders soon after the quake hit, warning of possible 10-foot waves. The quake may have been responsible for an issue at a local nuclear power plant where a pump responsible for cooling fuel rods shut down.
Japanese authorities lifted the tsunami warnings at 9:45AM local time, around four hours after the shaking started. Prefectures