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A Possible Correlation between the 1980 East off Izu Peninsula Earthquake and Mantle Earthquakes beneath the Sagai Bay
https://doi.org/10.15083/0000033046
https://doi.org/10.15083/00000330468905de1c-1aa5-483c-b004-2d2bbcbee406
名前 / ファイル | ライセンス | アクション |
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ji0554002.pdf (473.3 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | A Possible Correlation between the 1980 East off Izu Peninsula Earthquake and Mantle Earthquakes beneath the Sagai Bay | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000033046 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 1989年伊豆半島東方沖地震と相模湾のマントル地震の相関について | |||||
著者 |
Yamashina, Ken'ichiro
× Yamashina, Ken'ichiro |
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著者別名 | ||||||
識別子 | 128866 | |||||
識別子Scheme | WEKO | |||||
姓名 | 山科, 健一郎 | |||||
著者所属 | ||||||
著者所属 | 地震研究所 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The present paper proposes a possible correlation between recent shallow and mantle earthquakes in the Izu region, Central Japan, as follows. (1) The 1980 East off Izu Peninsula earthquake and recent major shallow earthquakes (MS ≧ 5.0) in the Izu region were all preceded by mantle earthquakes (about 110-160 km in depth) within two months (especially the period 15-60 days prior to the former) in the Sagami Bay, Izu-Oshima and Izu Peninsula areas. Such a phenomenon will occur accidentally with about 1% probability, or about 0.3% for those beneath the northern Sagami Bay. (2) When a mantle earthquake (especially about 110-160 km in depth) occurs in the Sagami Bay, Izu-Oshima and Izu Peninsula areas, or especially under the northern Sagami Bay, with magnitude larger than about 3.0-3.5, it may be a precursor to a subsequent shallow earthquake (M ≧ 5.0) in the Izu region within two months with probability of about 30% or 40%. (3) A similar correlation may also exist between the major shallow ear- thquakes and mantle earthquakes (about 110-160 km in depth) which occurred under the northern Sagami Bay 110-150 days prior to the former. The probability that such a phenomenon will occur accidentally is about 1%. The present results, however, are not conclusive because of the lack of sufficient data, and further studies on future earthquakes will be needed. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 伊豆地域の最近の浅い大きな地心とマントル地震との相関を調べた結果,次のようなことがわかった.(1)1980年伊豆半島東方沖地震や最近の浅い大きな地震(M≧5.0)は,いずれも2ヵ月前以内(特に15-60日前)に,相模湾,伊豆大島,伊豆半島地域のマントル地震(深さ110-160km)を伴っていた.このような現象が偶然起こる確率は約1%,相模湾北部付近だけに注目すると約0.3%である.(2)相模湾,伊豆大島,伊豆半島地域,特に相模湾北部付近で,マグニチュード約3.0-3.5以上のマントル地震(特に深さ110-160km)が起きた時は,2ヵ月以内に伊豆地域で浅い地震(M≧5.0)が起こる可能性がある.その確率はそれぞれ約30%,40%である.(3)同様な相関が,浅い大きな地震と110-150日前の相模湾北部付近のマントル地震(深さ約110-160km)の間にもあるかもしれない.偶然そうなる確率は約1%である.しかしこれらの結果は,データ不足のためはっきり結論づけることはできない.今後の同地域の地震活動を見守る必要がある. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 55, 号 4, p. 885-893, 発行日 1981-03-31 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |