3D bathymetric image along the Sagami Trough and the Boso Triple Junction area deduced from150 meter grid DEM.
We have made detailed anaglyph images based on 150m DEM processed from the original data obtained by Japan Coast Guard and JAMSTEC, in order to analyze submarine topography for more precise interpretation of submarine active faults than that mapped by previous workers along the Sagami Trough and the Boso Triple Junction area. Younger fault escarpments on the both sides of northern part of the Sagami Trough in the Sagami Bay suggest their historical activities. In the vicinity of the Boso Triple Junction, trench−parallel west−dipping thrusts form extensive fault scarps in the aseismic gaps during historical period. One of the scarps is longer than 200km associated with evidence of repeated activity, and is probably a candidate of M 8 earthquake in not far future.
| Main Authors: | , , , , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/1834/15618 |
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| Summary: | We have made detailed anaglyph images based on 150m DEM processed from the original data obtained by Japan Coast Guard and JAMSTEC, in order to analyze submarine topography for more precise interpretation of submarine active faults than that mapped by previous workers along the Sagami Trough and the Boso Triple Junction area. Younger fault escarpments on the both sides of northern part of the Sagami Trough in the Sagami Bay suggest their historical activities. In the vicinity of the Boso Triple Junction, trench−parallel west−dipping thrusts form extensive fault scarps in the aseismic gaps during historical period. One of the scarps is longer than 200km associated with evidence of repeated activity, and is probably a candidate of M 8 earthquake in not far future. |
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