Last Friday, 11 March, there was a massive earthquake in the north-east of Japan, followed by an extensive tsunami that swept away many cities, towns, and villages. Since then, there has been many quakes in Japan, some of which are considered as aftershocks that normally follow after a large earthquake, but others are considered as separate earthquakes.
Two large earthquakes have occurred since last Friday. The first one occurred on Saturday 12 March, in northern Nagano and Niigata, on the Japan Sea side of central Japan. Several houses were clushed and many people had to evacuate. The second one occurred yesterday, Tuesday 15 March, in Shizuoka, south-west of Tokyo, again forcing the residents to stay at the evacuation centres.
Experts view that these earthquakes are likely to be triggered by the earthquake in the nor-th east of Japan on Friday. Aftershocks of Friday's earthquake are considered to be at smaller scales, whereas earthquakes originating from other epicentres can be at any scales. Thus, increasing incidents of earthquakes in Japan pose serious concerns among people living in Japan, including myself.
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