3D bathymetric image of the northern margin of the Philippine Sea plate based on 3 second grid DEM
The northern margin of the Philippine Sea plate is marked by the Nankai Trough. The trough is known as one of the most active seismogenic zone in the world. However, the basic observations for prediction of giagntic earthquakes such as the detailed distribution of active faults have been lacking mainly due to insufficiency of data of the detailed submarine topography. To make a more precise submarine active fault map along the trough, we have made detailed submarine topographic images based on 3 second (approximately 90 m) DEM processed from the original data obtained by Japan Coast Guard since 1984 using multi−narrow beam echo sounder. Then we have made stereo−pair copies of topographic images for interpretation of active faults, in a similar manner we use in aerial photograph stereo sets for onland active faults. We have also prepared anaglyph images from the stereo−pairs for discussion.
| Main Authors: | , , , , , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
2011
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| Online Access: | http://hdl.handle.net/1834/15671 |
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| Summary: | The northern margin of the Philippine Sea plate is marked by the Nankai Trough. The trough is known as
one of the most active seismogenic zone in the world. However, the basic observations for prediction of
giagntic earthquakes such as the detailed distribution of active faults have been lacking mainly due to insufficiency of data of the detailed submarine topography. To make a more precise submarine active fault map along the trough, we have made detailed submarine topographic images based on 3 second (approximately 90 m) DEM processed from the original data obtained by Japan Coast Guard since 1984 using multi−narrow beam echo sounder. Then we have made stereo−pair copies of topographic images for interpretation of active faults, in a similar manner we use in aerial photograph stereo sets for onland active faults. We have also prepared anaglyph images from the stereo−pairs for discussion. |
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