TY - SER AU - Hasegawa,Akira AU - Umino,Norihito AU - Takagi,Akio AU - Suzuki,Ziro ED - Symposium J2: Processes at subduction zones TI - Double-planed deep seismic zone and anomalous structure in the upper mantle beneath northeastern Honshu (Japan) SN - 00401951 N1 - ; bibliogr. p. 6 ER -