How many aftershocks shook Japan after that major queake? How long is it expected to happen?

Question:

Are aftershock dangerous? Is Tokyo or centre of the country seismic zone?

Answer:

So far there have been over 200 aftershocks in the past week. Some have been over a 7.

The seismic area runs along the coast in the ocean pretty much along the entire length.

Currently most of the seismic activity is running between Tokyo to the northern tip on the main island.

Tokyo is feeling these quakes and aftershocks, but has not really been damaged directly by them.