Splay Fault Branching Along the Nankai Subduction Zone
2002; American Association for the Advancement of Science; Volume: 297; Issue: 5584 Linguagem: Inglês
10.1126/science.1074111
ISSN1095-9203
AutoresJin‐Oh Park, Takeshi Go Tsuru, Shuichi Kodaira, Phil R. Cummins, Yoshiyuki Kaneda,
Tópico(s)High-pressure geophysics and materials
ResumoSeismic reflection profiles reveal steeply landward-dipping splay faults in the rupture area of the magnitude (M) 8.1 Tonankai earthquake in the Nankai subduction zone. These splay faults branch upward from the plate-boundary interface (that is, the subduction zone) at a depth of approximately 10 kilometers, approximately 50 to 55 kilometers landward of the trough axis, breaking through the upper crustal plate. Slip on the active splay fault may be an important mechanism that accommodates the elastic strain caused by relative plate motion.
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