Like the great crevasses that have been opening up in this region, the 7 of 10 stretch will not be accompanied by great quakes. The stretch zone is silent, in the main. Jiggling and shuddering might occur, with minor quakes jolting now and then, but basically a silent process. Of course there will be lava, hardening into a new surface, as the plates are being pulled apart and beneath the plates is magma. And where the surface is thin, magma may bubble up. But the Red Sea will not be an explosive or erupting volcanic region, as Hawaii is, because it will not be under pressure from colliding or compressing plates.
ZetaTalk January 29, 2011