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2011年東北地方太平洋沖地震前後のTerraSAR-X強度画像を用いた 地殻変動の検出
https://nied-repo.bosai.go.jp/records/5942
https://nied-repo.bosai.go.jp/records/5942cf09ba5f-783a-4554-9213-020058aaf757
Item type | researchmap(1) | |||||||||||||
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公開日 | 2023-03-30 | |||||||||||||
タイトル | ||||||||||||||
言語 | ja | |||||||||||||
タイトル | 2011年東北地方太平洋沖地震前後のTerraSAR-X強度画像を用いた 地殻変動の検出 | |||||||||||||
タイトル | ||||||||||||||
言語 | en | |||||||||||||
タイトル | Estimation of crustal movement due to the 2011 Tohoku, Japan Earthquake from TerraSAR-X intensity images | |||||||||||||
言語 | ||||||||||||||
言語 | jpn | |||||||||||||
著者 |
リュウ ウェン
× リュウ ウェン
× 山崎 文雄
|
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抄録 | ||||||||||||||
内容記述タイプ | Other | |||||||||||||
内容記述 | 2011年3月11日に発生した東北地方太平洋沖地震は、東日本の広域にわたって甚大な被害を引き起こした。またこの地震によって、陸上では最大約5 mの地殻変動が観測された。本研究では、地震前後に撮影された高解像度衛星TerraSAR-Xの強度画像を比較し、無被害の建物の2時期の位置ずれを検出し、これを地殻変動と見なす手法を提案した。最初に、地震前後の強度画像から後方散乱係数の高い建物を抽出し、地震前後の建物を比較することで、変化のない建物の検出を行った。無被害建物の地震前後における位置ずれを面積相関法で求め、それらの平均値をエリア内の地殻変動量と見なした。提案手法を東北地方と東京中心部の衛星画像に適用し、GPS電子基準点の記録との比較で結果の精度を検証した。 | |||||||||||||
言語 | ja | |||||||||||||
抄録 | ||||||||||||||
内容記述タイプ | Other | |||||||||||||
内容記述 | The 11 March 2011 Tohoku, Japan Earthquake caused widespread devastation in the eastern Japan. Crustal movements larger than 5 m were observed on the land after the earthquake. In this study, a method to grasp the surface movement from pre- and post-event TerraSAR-X intensity images was proposed. Since the shifts of non-changed buildings between the two SAR images can be seen as the crustal movements, firstly the buildings in the pre- and post-event images were extracted by a segmentation approach. Then non-changed buildings were detected by matching the buildings in the pre- and post-event images at similar locations. Finally, the shifts were calculated by area-based matching. The method was tested on the TerraSAR-X images of Tohoku region and central Tokyo, and the accuracy was verified by the observed data from GPS ground stations. | |||||||||||||
言語 | en | |||||||||||||
書誌情報 |
ja : 日本地震工学会論文集 en : Journal of Japan Association for Earthquake Engineering 号 12, p. 4_3-4_13, 発行日 2012 |
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出版者 | ||||||||||||||
言語 | ja | |||||||||||||
出版者 | 公益社団法人 日本地震工学会 | |||||||||||||
出版者 | ||||||||||||||
言語 | en | |||||||||||||
出版者 | JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING | |||||||||||||
DOI | ||||||||||||||
関連識別子 | 10.5610/jaee.12.4_3 |