| Autor: |
TSUTSUI, Tomoki, TAMEGURI, Takeshi, IGUCHI, Masato |
| Jazyk: |
japonština |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
京都大学防災研究所年報. B. 63:118-135 |
| ISSN: |
0386-412X |
| Popis: |
Seismic reflectors at the depth of Aira Caldera are presented through seismic array analysis of the later arrivals in the controlled-source seismograms across northern Kagoshima Bay on November 2008. Though the first arrivals with a characteristic pattern have been analyzed, later arrivals have never been analyzed vigorously. Seismic array analysis of the seismograms resolves numerous PP and PS reflections from depth of Aira Caldera in the basis of arrival time, back azimuth and apparent velocity. It is revealed that reflector structure in the eastern part is more complicated than that in the western part down to 20 km depth and prominent PS conversion comes from 14 km depth in the west part of Aira Caldera. The result provides fundamental knowledge to consider activity of the caldera. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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