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Inversion analysis of the 2004 off the Kii peninsula earthquakes using seismic intensity data

机译：利用地震烈度资料反演2004年基伊半岛地震。

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An inversion analysis has been developed to evaluate short-period radiation zones on an earthquake fault plane using seismic intensity data. It is robust and widely applicable even for historical earthquakes without ground motion, tsunami and geodetic data observed by instruments. It was applied to the 2004 off the Kii peninsula earthquakes that occurred in the Philippine Sea plate along the Nankai Trough. The short-period seismic wave radiation zone of each event during the 2004 off the Kii peninsula earthquakes from the inversion analysis was included in epicenter area of the corresponding aftershocks and slipped fault zone derived from the waveform inversion analysis as well. It may be also found that there were slip areas where little short period energy radiated. It also applied to the 1899/3/7 earthquake whose felt area was similar to that of the 2004 off the Kii peninsula earthquakes. However, it was indicated that the short-period radiation zones of the 1899 earthquake was located near the coast of the Kii peninsula and departed from that of the 2004 earthquake. The 1899 event might be an intermediate-depth earthquake in the Philippine Sea plate or a relative small interplate event at the west margin of the Tonankai earthquake source region.
机译：已经开发出反演分析，以使用地震烈度数据评估地震断层平面上的短周期辐射带。它即使在没有仪器观测到的地面运动，海啸和大地测量数据的历史地震中也很强大，并且广泛适用。它被用于2004年在南海海槽沿菲律宾海板发生的基伊半岛地震中。从反演分析得出的2004年基伊半岛地震后各事件的短周期地震波辐射区也包括在相应余震的震中区和从波形反演推导出的滑动断层带中。也可能发现有一些滑动区域，几乎没有短期能量辐射。它也适用于1899/3/7地震，其毡区与2004年基伊半岛地震的毡区相似。但是，据指出，1899年地震的短周期辐射区位于基伊半岛海岸附近，而与2004年地震的区域不同。 1899年的事件可能是菲律宾海板块的中深度地震，也可能是Tonankai地震源区西缘的较小的板块间事件。

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