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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
第73号 >
2006年大分県中部の地震の震源特性
| Title: | 2006年大分県中部の地震の震源特性 |
| Other Titles: | Source Characteristics of the 2006 Oita-Chubu Earthquake（MJ 6.2） Occurred in the Philippine Sea Slab |
| Authors: | 南雲, 秀樹1 Browse this author |
| Authors(alt): | Nagumo, Hideki1 |
| Issue Date: | 19-Mar-2010 |
| Publisher: | 北海道大学大学院理学研究院自然史科学部門（地球物理学） |
| Journal Title: | 北海道大学地球物理学研究報告 |
| Journal Title(alt): | Geophysical bulletin of Hokkaido University |
| Volume: | 73 |
| Start Page: | 23 |
| End Page: | 35 |
| Abstract: | A moderate size intraslab earthquake occurred on 12 June, 2006 at the depth of about 145 km in the Philippine Sea Plate beneath central Oita. Focal mechanism solution determined by F-net shows that this event has a down-dip extension focal mechanism and aftershock activity of this event is very low. Observed displacement waveforms indicate rupture propagates on the east-dipping nodal plane. To investigate source process of this event, inversion of strong motion waveforms is carried out. Result shows complex rupture propagation during this earthquake. Largest slip area is located near the hypocenter. Snapshots show rupture propagates to the right upper direction on the fault plane at first and change to the left upper direction after few seconds. Based on inversion result, the characterized source models of 2006 event are constructed. In this study source models with one and two asperities are proposed. Simulations using the empirical Green's function method suggest that the source model with two asperities is preferable but detail rupture process of this event is much more complex. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/44454 |
| Appears in Collections: | 北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第73号
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