Unifying analysis of continyous crustal deformation data in Japan searching for Slow and Silent Earthquakes

日本连续地壳形变数据的统一分析寻找缓慢而无声的地震

• 批准号: 07304034
• 负责人: KASAHARA Minoru
• 金额: $ 3.78万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07304034/
• 关键词: Ultra-Long period earthquake; The crustal deformation observations; BAYTAP-G; The crustal deformation data; Trend; The 1994 Off Sanriku Earthquake; Hyogoken-nanbu Earthquake; 広域地殻変動; 余効変動; スロー・ア-スクエイク; スローア-スクエイク; 地震前兆地殻変動; Baytap-G; 三陸沖地震

In fiscal year of 1995, at meeting in Shizuoka and Kyoto, we have held a consultation to unify the data format (the period 1991-1995) and analysis method. Following a consultation, we have unified the data format and calculated trend-terms of the crustal deformation data by using Tidal analysis program, BAYTAP-G.At meeting in Mizusawa, we havemade first reporte of studying.In fiscal year of 1996, following the previous fiscal, we have analyzed of the crustal deformation data. At meetingin Kochi, we have made a second report, and then at meeting in Sapporo, we have made final report that (1) The 1994 Off Sanriku Earthquake, after seismic shock, a remarkably postseismic strain change of about 10^<-8> order with the time constant of from about one to three days were recorded in the trend term of record at Erimo, Miyako and Esashi etc.atthe same time. That were similar change recorded at Esashi and Miyako's extensometer of The 1992 Off Sanriku Earthquake (2) The 1995 Hyogoken-nanbu Earthquake, from about harf a year before, the changes of trend-term were recorded at Yamasaki, Abuyama, Amagase and Osakayama at the same time.

在1995财政年度，在静冈和京都的会议上，我们举行了一次协商，以统一数据格式（1991-1995年期间）和分析方法。经过协商，我们统一了形变资料的数据格式，并利用潮汐分析程序BAYTAP-G计算了形变资料的趋势项，在水泽会议上作了第一次研究报告，1996年度，继上一年度之后，我们对形变资料进行了分析。在高知会议上，我们作了第二次报告，在札幌会议上，我们作了最后的报告：（1）1994年三陆近海地震，在地震后，在<-8>Erimo、宫古和江藏等地记录的趋势项中同时记录到了一个时间常数约为1 ~ 3天的约10阶的显著震后应变变化。（2）1995年兵库县南部大地震，山崎、阿夫山、尼濑、大坂4个地震点的趋势项与1年前的趋势项变化相同。

项目成果

Yoshimitsu Okada: "Simulated Empirical Law of Coseismic Crustal Deformation" Journal of Physics of the Earth. 43-6. 697-713 (1995)

Yoshimitsu Okada：“同震地壳变形的模拟经验定律”地球物理学杂志。

Ichiro Kawasaki: "Interplate Moment Release in Seismic and Seismo-Geodetic Bands and the Seismo-Geodetic Coupling in the Sanriku-Oki Region along the Japan Trench -A Basis for Mid-Term/Long-term Prediction-" Zisin, Ser2. 50-supp.293-307 (1998)

川崎一郎：“地震和地震大地测量带中的板间矩释放以及日本海沟三陆冲地区的地震大地耦合 - 中长期预测的基础 -” Zisin，Ser2。

川崎 一郎: "サイスモ・ジオデティック・バンドの地球ダイナミクス -序説" 月刊地球. 20. 3-7 (1998)

川崎一郎：“Cysmo 大地测量带的地球动力学 - 简介”月刊地球。 20. 3-7 (1998)

Shuzo Takemoto: "Recent Results Obtained From Continuous Monitoring of Crustal Deformations" Journal of Physics of the Earth. 43・4. 405-418 (1995)

Shuzo Takemoto：“地壳变形连续监测的最新结果”，《地球物理学杂志》43・4（1995）。

Kosuke Heki: "Short Term afterslip in 1994 Sanriku-Haruka-Oki-earthquake" Geophysical Research Letters. 24・24. 3285-3288 (1997)

Kosuke Heki：“1994 年三陆遥冲地震的短期余滑”地球物理研究快报 24・24（1997 年）。