TY - JOUR
T1 - Normal fault type events in the upper plane of the double-planed deep seismic zone beneath the northeastern japan arc
AU - Matsuzawa, Toru
AU - Umino, Norihito
AU - Hasegawa, Akira
AU - Takagi, Akio
PY - 1986
Y1 - 1986
N2 - The spatial change in the focal mechanism of the intermediate-depth earthquakes in the Tohoku District, the northeastern part of Honshu, Japan, is investigated in detail. In addition to general features of the distribution of focal mechanisms revealed *y the previous studies, it is found that normal fault type events are dominant in the upper seismic plane of the double-planed deep seismic zone beneath the volcanic front, where the upper seismic plane is bending downward. The bending of the descending oceanic plate is probably the cause of these normal fault type events.
AB - The spatial change in the focal mechanism of the intermediate-depth earthquakes in the Tohoku District, the northeastern part of Honshu, Japan, is investigated in detail. In addition to general features of the distribution of focal mechanisms revealed *y the previous studies, it is found that normal fault type events are dominant in the upper seismic plane of the double-planed deep seismic zone beneath the volcanic front, where the upper seismic plane is bending downward. The bending of the descending oceanic plate is probably the cause of these normal fault type events.
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U2 - 10.4294/jpe1952.34.85
DO - 10.4294/jpe1952.34.85
M3 - Article
AN - SCOPUS:0022903978
VL - 34
SP - 85
EP - 94
JO - Journal of Physics of the Earth
JF - Journal of Physics of the Earth
SN - 0022-3743
IS - 1
ER -