Canie-looks like the 103-106 deg rings go through Dominican republic. Some other rings go near the Myranmar (sp?) quake, but maybe not quite through it (hard to tell at scale/resolution of map). I think the mid Atlantic ridge quake neat 1 deg S was outside the rings. So, I don't have a feel for whether this means anything, but you could plot the rings for those 3 quakes together....and see if several go through Hokkaido....Chris