Hmmmmm, sorting the information out now.
Yes, two quakes within 41 seconds of each other.
Deep one (first) 26 miles, shallow (second) 16 miles. Both are too deep to create any substantial tsunami. The shallow one does not have a tsunami warning either.
Both have been reviewed by a seismonlogist - so they are valid events.
Nope. Just one. Updated now : http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/region/Asia_eqs.php
There is a Tsunami Warning for Miyagi : http://www.jma.go.jp/en/tsunami/index.html