Evolution of crustal deformation in the northeast–central Japanese island arc: Insights from fault activity |
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| Authors: | Ayumu Miyakawa Makoto Otsubo |
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| Affiliation: | Geological Survey of Japan, Tsukuba, Japan |
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| Abstract: | We evaluated fault activity in northeast–central Japan based on fault orientation, regional stress field, and slip tendency analysis for active and non‐active faults (i.e. faults for which Quaternary activity has not been identified). Slip tendency is generally higher along active faults than non‐active faults, although a high slip tendency was observed along some non‐active faults, indicating their potential to become active. The potential for fault activity along non‐active faults can be modeled using the temporal evolution from non‐active to active during long‐term crustal deformation. The density of potentially active faults varies spatially across the study areas and reflects the temporal evolution of crustal deformation in northeast–central Japan. |
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| Keywords: | active fault eastern margin of the Japan Sea Niigata– Kobe Tectonic Zone non‐active fault slip tendency stress inversion |
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