Thank you, I did not know that... I am bookmarking the link to study up up it.
Bikk
P.S. hope all of us Freepers (in Japan) can get some sleep tonight, I am sure the big one for now is over.
It all depends upon when the size and numbers of quakes return to pre-shock levels. With an area as historically active as Japan, this may prove to be a challenge for seismologists.
Relax and find tranquility. Save panic for peaceful days in the summer when a bee tries to sting. Be strong, for all good people are with you in spirit, and many in deeds.