Tectono-geological research on the seismogenic belt along the Japan margin of Amurian Plate

现今地震构造区与活动断裂区相对应，形成于本州岛弧的孕育期。如果地壳应变场发生变化，则每个省的行为不同。2011年东北近海地震就是一个典型的例子，因为诱发地震发生在阿穆尔板块东缘的沿着。作为这次大地震的震后表现，由于向东位移引起的伸展应变区被显著观察到，并从日本海东缘延伸到日本中北部的北陆地区。但区域构造应力场的主轴排列没有发生反转，上地壳的伸展应变场与孕震应力场的压缩状态存在着有趣的重叠。

The Present seismotectonic province corresponds with the active fault province, and was formed during the birth term of Honshu Arc. If the crustal strain field was changed, behaviors differ for every province. For a typical example, the 2011 off-Tohoku earthquake showed this vividly, since the induced earthquake occurred along the eastern margin of Amurian Plate. As a postseismic behavior of this mega-earthquake, extensional strain province due to eastward displacement were remarkably observed and is extending from the eastern margin of Japan Sea into the Hokuriku region, north-central Japan. However, no reversal change has been observed in principal-axis arrangement of regional tectonic stress field, and an interesting overlapping of the extensional strain field with the compression state of seismogenic stress field was noticed in the upper crust.