Two earthquakes rocked Japan's subsequent return Tuesday morning, but reported no significant damage. Earthquake scales smaller than the aftershock that hit Japan since a devastating earthquake on 11 March.
Japan Meteorological Agency said the first quake hit at 08:06 local Fukushima (GMT/06.06 2306 GMT) with the power of 4.0 on the Richter scale. Location of earthquake similar to the 9.0 scale earthquake rickter on March 11 that caused the crisis in Fukushima Daiichi power plant. The second earthquake shook northeast of Tokyo at 08:08 (GMT/06.08 2308 GMT) with the power of 6.3 on the Richter scale, shook the center of Tokyo.
Earthquakes on Monday night at 7.1 on the Richter scale caused power outages in the district of Fukushima Daiichi, disrupt NPP cooling operation for about 50 minutes. Tokyo Electric Power Co. said there was no problem in the operation of the cooling of the suspension of pumping. But the fire had occurred in reactor No. 4. Tokyo - 7.1 earthquake on the Richter scale, shook the Japanese who returned this afternoon, Monday (04/11/2011) result in the expansion of nuclear evacuation zone around nuclear Fukushima Daiichi nuclear power plant due to high radiation.
A 7.1 magnitude earthquake shook buildings in Tokyo and eastern Japan, triggering a small tsunami warning. NHK state television said it caused the power plant to shut down two reactors leak damaged.
U.S. Geological Survey said the aftershock struck 38 km (24 miles) west of the city of Iwaki, at a depth of 13 km (8 miles).
Tokyo Electric Power Co. (TEPCO), which operates the plant, said workers had stopped pouring water reactor coolant at No. 1, No. 2 and No. 3 in Fukushima.
Cabinet Secretary said Yukio Edano villages and towns outside the 20 km (12 miles) further expanded the evacuation zone as is known to have had more radiation.