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Secular subsidence in northeastern Japan

Secular subsidence in northeastern Japan

Subduction erosion and secular subsidence in northeastern Japan

Heki, K., Earth Planet. Sci. Lett., 219, 13-20, 2004.

Both horizontal and vertical interseismic velocity fields are consistent with those of models for southwestern Japan (left panel). In northeastern Japan, however, significant negative deviation is observed in the vertical velocity field (right panel), indicating that some unknown mechanism is causing secular subsidence. This may be the ongoing basal subduction erosion that caused the Oyashio paleoland to subside millions of years ago and created the Sanriku region’s beautiful coastline (below).

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: The Earth: A Planet of Wonder (in Japanese); The Earth: A Planet of Wonder (in Japanese) mpg file (1 GB); The Sumatra earthquake and the earth (in Japanese); Why do earthquakes occur? (in Japanese); Another way to use GPS (in Japanese); Plate motion and crustal deformation observed using GPS (in Japanese); Changing earth as shown by gravity (in Japanese); Preseismic TEC enhancement (in Japanese); Coseismic traveling ionospheric disturbances; Lunar gravity anomaly; Secular subsidence in northeastern Japan; Melting of snow as a possible trigger for earthquakes; Small coupling in the Tokai area