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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 46
  4. 3
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 46
  5. 3

22. Earthquake Magnitude Determination in relation to Regional Variations of P wave Amplitudes Part 1

http://hdl.handle.net/2261/12394
746a9f1c-ad50-4954-8f9d-748d18640162
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名前 / ファイル ライセンス Actions
ji0463002.pdf ji0463002.pdf (1.6 MB)
item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2008-05-30
タイトル
タイトル 22. Earthquake Magnitude Determination in relation to Regional Variations of P wave Amplitudes Part 1
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
その他のタイトル
その他のタイトル 22.P波の振巾の地域性とマグニチュードの決定について(1)
著者 Mizoue, Megumi

× Mizoue, Megumi

WEKO 130543

Mizoue, Megumi

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著者別名
姓名
姓名 溝上, 恵
著者所属
Earthquake Research Institute
抄録
内容記述タイプ Abstract
内容記述 Body wave magnitude mpz in EDR (Earthquake Data Report) of USCGS for earthquakes with shallow forcal depth (H&lne;50km) determined at near and regional epicentral distances (5°&lne;⊿<30°) deviates significantly from the magnitude of the same events determined at teleseismic distances ⊿&gne;30°). Overestimation of magnitude by as much as 0.5 to 1.5 magnitude units in the epicentral distance ranging between 5° and 13° relative to the magnitude at teleseismic distances shows that the zone of low amplitude signals predicted by Gutenberg and Richter (1956) in that distance range does not exist as a worldwide phenomenon. Available distance range of the calibrating function Q(A) provided by Gutenberg and Richter as a worldwide standard should be limited to the distance range of more than 20°. Regional correction factor as a function of epicentral distance subtractive from the calibrating function Q(⊿) are calculated for the five reference stations, College/Alaska, Tonto Forest/Arizona, Caracas/Venezuela, Port Moresby/New Guinea and Rabaul/New Britain Island.|Gutenberg-Richter(1956)によってあたえられたQ -functionが震央距離⊿&gne30°でのP波の振巾と⊿との関係をあたえるよい近似関数であることは観測および理論からたしかめられている.しかしあさい震源(H&lne;50km)をもつ地震のマグニチュードmpzが⊿&gne;30°できめられたものと⊿<30°できめられたものとでは顕著な相違を示す場合がある.これはQ -functionが⊿<30°ではかならずしもP波の振巾と⊿との関係をあたえるよい近似関数ではないことをしめしている.特に地域によって5゜&lne;⊿<く13°できめられたmpzが⊿&gne;30°できめられたmpzと比較して,0.5ないし1.5程度おゝきくみつもられる傾向があるという事実は,Q -functionによってあたえられる⊿=10゜近傍のP波の振巾が極度にちいさくみつもられすぎていることに対応する.
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 46, 号 3, p. 457-484, 発行日 1968-07-25
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Scheme NDC
主題 453
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
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