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Combination of onshore broadband seismograms and high‐frequency (~20–200 s) seafloor pressure records provided the resolution of the horizontal locations of the centroids, consistent with the results of tsunami inversion using the long‐period (≳10 min) seafloor pressure records although the depth was not constrained well, whereas the source locations were poorly constrained by the onshore seismic data alone. Also, the waveforms synthesized from the estimated CMT solution demonstrated the validity of the theoretical relationship between pressure change and vertical acceleration at the seafloor. The results of this study suggest that offshore pressure records can be utilized as offshore seismograms, which would be greatly useful for revealing the source process of offshore earthquakes.", "subitem_description_language": "ja", "subitem_description_type": "Other"}, {"subitem_description": "We examined the dynamic pressure change at the seafloor to estimate the centroid moment tensor solutions of the largest and second largest foreshocks (Mw 7.2 and 6.5) of the 2011 Tohoku‐Oki earthquake. Combination of onshore broadband seismograms and high‐frequency (~20–200 s) seafloor pressure records provided the resolution of the horizontal locations of the centroids, consistent with the results of tsunami inversion using the long‐period (≳10 min) seafloor pressure records although the depth was not constrained well, whereas the source locations were poorly constrained by the onshore seismic data alone. Also, the waveforms synthesized from the estimated CMT solution demonstrated the validity of the theoretical relationship between pressure change and vertical acceleration at the seafloor. The results of this study suggest that offshore pressure records can be utilized as offshore seismograms, which would be greatly useful for revealing the source process of offshore earthquakes.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "American Geophysical Union", "subitem_publisher_language": "ja"}, {"subitem_publisher": "American Geophysical Union", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1002/2017GL075386"}}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Tatsuya Kubota", "creatorNameLang": "ja"}, {"creatorName": "Tatsuya Kubota", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Tatsuhiko Saito", "creatorNameLang": "ja"}, {"creatorName": "Tatsuhiko Saito", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Wataru Suzuki", "creatorNameLang": "ja"}, {"creatorName": "Wataru Suzuki", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Ryota Hino", "creatorNameLang": "ja"}, {"creatorName": "Ryota Hino", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers", "subitem_title_language": "ja"}, {"subitem_title": "Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4047", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4047", "relation": {}, "relation_version_is_last": true, "title": ["Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers"], "weko_shared_id": -1}
Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers
https://nied-repo.bosai.go.jp/records/4047
https://nied-repo.bosai.go.jp/records/40473f1b4ad8-8a7f-4f9f-9e89-10fd4c6b6923
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 | Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers | |||||||||||||||||||||
タイトル | ||||||||||||||||||||||
言語 | en | |||||||||||||||||||||
タイトル | Estimation of seismic centroid moment tensor using ocean bottom pressure gauges as seismometers | |||||||||||||||||||||
言語 | ||||||||||||||||||||||
言語 | eng | |||||||||||||||||||||
著者 |
Tatsuya Kubota
× Tatsuya Kubota
× Tatsuhiko Saito
× Wataru Suzuki
× Ryota Hino
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抄録 | ||||||||||||||||||||||
内容記述タイプ | Other | |||||||||||||||||||||
内容記述 | We examined the dynamic pressure change at the seafloor to estimate the centroid moment tensor solutions of the largest and second largest foreshocks (Mw 7.2 and 6.5) of the 2011 Tohoku‐Oki earthquake. Combination of onshore broadband seismograms and high‐frequency (~20–200 s) seafloor pressure records provided the resolution of the horizontal locations of the centroids, consistent with the results of tsunami inversion using the long‐period (≳10 min) seafloor pressure records although the depth was not constrained well, whereas the source locations were poorly constrained by the onshore seismic data alone. Also, the waveforms synthesized from the estimated CMT solution demonstrated the validity of the theoretical relationship between pressure change and vertical acceleration at the seafloor. The results of this study suggest that offshore pressure records can be utilized as offshore seismograms, which would be greatly useful for revealing the source process of offshore earthquakes. | |||||||||||||||||||||
言語 | ja | |||||||||||||||||||||
抄録 | ||||||||||||||||||||||
内容記述タイプ | Other | |||||||||||||||||||||
内容記述 | We examined the dynamic pressure change at the seafloor to estimate the centroid moment tensor solutions of the largest and second largest foreshocks (Mw 7.2 and 6.5) of the 2011 Tohoku‐Oki earthquake. Combination of onshore broadband seismograms and high‐frequency (~20–200 s) seafloor pressure records provided the resolution of the horizontal locations of the centroids, consistent with the results of tsunami inversion using the long‐period (≳10 min) seafloor pressure records although the depth was not constrained well, whereas the source locations were poorly constrained by the onshore seismic data alone. Also, the waveforms synthesized from the estimated CMT solution demonstrated the validity of the theoretical relationship between pressure change and vertical acceleration at the seafloor. The results of this study suggest that offshore pressure records can be utilized as offshore seismograms, which would be greatly useful for revealing the source process of offshore earthquakes. | |||||||||||||||||||||
言語 | en | |||||||||||||||||||||
書誌情報 |
ja : Geophysical Research Letters en : Geophysical Research Letters 巻 44, 号 21, p. 10907-10915 |
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出版者 | ||||||||||||||||||||||
言語 | ja | |||||||||||||||||||||
出版者 | American Geophysical Union | |||||||||||||||||||||
出版者 | ||||||||||||||||||||||
言語 | en | |||||||||||||||||||||
出版者 | American Geophysical Union | |||||||||||||||||||||
DOI | ||||||||||||||||||||||
関連識別子 | 10.1002/2017GL075386 |