Thank you for the information, Kingu. I looked up Misawa Air Base and the base is located in the same Prefecture, the Aomori Prefecture, as this earthquake.
Hopefully earthquake hazard precautions were taken when Misawa Air Base was first built.
Two days ago, they were closing roads around Misawa Air Base due to some road construction they were doing on the base:
Base construction
7/21/2008 - A Japanese construction worker updates road closure information July 17, 2008. Base residents should be prepared to use alternative routes during base road construction.
21 July 2008 Road construction
Misawa Air Base
The 35th Fighter Wing is the host unit at Misawa Air Base, Japan -- the northernmost U.S. air base in Japan. The only combined, joint service installation in the Western Pacific, Misawa Air Base is located on the shores of Lake Ogawara in Misawa City in the Aomori Prefecture.
Misawa Air Base
Here are some maps showing Japan, and the area of the earthquake:
Interesting.
And thanks particularly for the maps.