書誌事項
- タイトル別名
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- Long-period Ground Motions Recorded in the Tokyo Metropolitan Area during the 16 July, 2007 M6.8 Off Niigata-ken Chuetsu, Japan Earthquake
- 2007ネン ニイガタケン チュウエツオキ ジシン M6 8 ニ ヨル シュトケン ノ チョウシュウキ ジシンドウ
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Large and prolonged shaking with long-period ground motions having periods of about 7 sec were observed in central Tokyo during the Off Niigata-ken Chuetsu, Japan, M6.8 earthquake on 16 July, 2007. The observed ground motions from a dense nationwide strong motion network (KNET and KiK-net) demonstrate clearly that the long-period ground motions consist of Rayleigh waves, which developed at the northern edge of the Kanto Basin and were induced by conversion from the S waves radiating from the earthquake source. The amplitude and the duration of the long-period surface waves were enhanced dramatically as they propagated in the Kanto Basin, which has a thick cover of sedimentary rocks overlaying rigid bedrock. Observed ground motions of long-period signals at the center of Tokyo from the 2007 Off Niigata-ken Chuetsu event correlated well with observations from the Chuetsu earthquake on 23 Oct. 2004 (M 6.8). By analyzing waveform data from the main shock and aftershocks of the 2007 Off Niigata-ken Chuetsu earthquake and the Chuetsu earthquake in 2004, it is found that the long-period surface wave having a dominant period of about 7 sec at the center of Tokyo is developed efficiently by a large earthquake with a magnitude greater than about M6.5-7, but it is not developed by small earthquakes of less than about M6.5.
収録刊行物
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- 地学雑誌
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地学雑誌 116 (3/4), 576-587, 2007
公益社団法人 東京地学協会
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詳細情報 詳細情報について
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- CRID
- 1390001204228894976
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- NII論文ID
- 10025677026
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- NII書誌ID
- AN00322536
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- ISSN
- 18840884
- 0022135X
- http://id.crossref.org/issn/0022135X
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- NDL書誌ID
- 8941918
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可