ログイン
言語:

WEKO3

  • トップ
  • ランキング
To
lat lon distance
To

Field does not validate



インデックスリンク

インデックスツリー

メールアドレスを入力してください。

WEKO

One fine body…

WEKO

One fine body…

アイテム

  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 45
  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. 45
  5. 3

Travel Time Curve of Near Earthquakes in Japan Area and Some Related Problems. : 1. Procedures and Preliminary Results

https://doi.org/10.15083/0000033481
https://doi.org/10.15083/0000033481
22bb4850-e678-46c6-9963-d3b81c2489f0
名前 / ファイル ライセンス アクション
ji0453005.pdf ji0453005.pdf (1.9 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 Travel Time Curve of Near Earthquakes in Japan Area and Some Related Problems. : 1. Procedures and Preliminary Results
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 10.15083/0000033481
ID登録タイプ JaLC
その他のタイトル
その他のタイトル 日本付近の走時曲線 : 1.方法といろいろな深さの地震に対する結果
著者 the Research Group for the Travel Time Curve

× the Research Group for the Travel Time Curve

WEKO 130758

the Research Group for the Travel Time Curve

Search repository
著者別名
識別子Scheme WEKO
識別子 130759
姓名 走時曲線研究グループ
抄録
内容記述タイプ Abstract
内容記述 Recent advancements in the observations of natural and artificial earthquakes and in the improvement in the speed and memory size of electronic computers are sufficient to give us aspiration for the attempt of revising the travel time tables of near earthquakes which have been used in routine works for nearly thirty years in Japan. The Research Group for the Travel Time Curve was thus organized in view of the practical and theoretical applications of the earthquake observations as well as the studies of the crustal structure in this part of our planet. The Group aimed at the determination of travel time curves of earthquakes with different depths best fitted to the observations by the method of least squares for earthquakes originating in and around Japan by simultaneous adjustment of origin times and hypocentral locations of all the earthquakes studied. The station corrections for the arrival times for all the observatories are also to be determined at the same time. In the present study, our effort was inevitably confined to the study of travel time curves of near earthquakes up to the epicentral distance of 1500km, owing to the areal limitation of our country and paucity of observing stations in other neighbouring countries and in the oceanic area. But high seismicity in the region concerned allowed us to obtain many data even in the limited interval of eleven years (1954-1964). Several preliminary attempts and tests were made to select a feasible procedure for the purpose. For the time being, the memory size of an available computer and other factors confined us to the determination, at one time, of a travel time for the earthquakes with a given constant depth of hypocenter. Similar analyses were carried out for each earthquake group of respective hypocentral depths. In view of the practical significance, some preliminary studies and tests are briefly described in Part I, while the results of our final analyses are described in Part II. Major items treated in Part I are as follows; Selection of the formula to express the travel time curve and rejection criterion of inappropriate data (Section 2), dependency of the resulting travel time curve on the assumed epicenter location (Section 3), effect of the starting assumption of the location of the epicenter on the final epicenter coordinates approximated successively by the iterative application of Geiger's method (Section 4), convergency of the epicenter location and the travel time curve in alternate successive determinations of the travel time curve and epicenter location (Section 5), calculation of the travel time curve for epicentral distances less than 170 km (Section 6), method of simultaneous determination of the travel time curve and station correction for the arrival of the P-wave, together with the origin time and epicenter locations of all the earthquakes by means of arrival times of the P-waves of many earthquakes at the stations throughout our country (Section 7). In Part II, the last procedure reached at in Section 7 is applied, first to a group of earthquakes with a hypocentral depth of 40km as determined by the Japan Meteorological Agency. Some detailed reviews of the method and the results are given in Section 8. Similar analyses were next made of other groups of earthquakes with hypocentral depths of 0, 20, 60, and 80 km respectively, and the results are shown in Section 9. In Section 10, a comparison of the travel time curve obtained here for earthquakes of zero km depth is made with the travel times obtained in explosion seismic experiments carried out in Japan by the Research Group for Explosion Seismology.
抄録
内容記述タイプ Abstract
内容記述 最近の地震観測網の整備・観測精度の向上・地殻構造に関する知識の増大,大型高速電子計算機の発達等を考えると,日本近付の近地々震に対する走時曲線を再検討する機運が熱しつつあると考えられる.そこで,観測資料に出きるだけ忠実にP波の走時曲線を見直してみた.和達・鷺坂・益田の走時曲線に見合うように震央距離1500kmまでの走時曲線を作ることを目標とした.
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 45, 号 3, p. 625-656, 発行日 1967-11-30
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
戻る
0
views
See details
Views

Versions

Ver.1 2021-03-01 20:56:05.476986
Show All versions

Share

Mendeley Twitter Facebook Print Addthis

Cite as

エクスポート

OAI-PMH
  • OAI-PMH JPCOAR 2.0
  • OAI-PMH JPCOAR 1.0
  • OAI-PMH DublinCore
  • OAI-PMH DDI
Other Formats
  • JSON
  • BIBTEX

Confirm


Powered by WEKO3


Powered by WEKO3