2015 Fiscal Year Final Research Report
Estimation of earthquake information necessary for tsunami early warning
Project/Area Number |
24540460
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Solid earth and planetary physics
|
Research Institution | Building Research Institute |
Principal Investigator |
Hara Tatsuhiko 国立研究開発法人建築研究所, 国際地震工学センター, 上席研究員 (40360466)
|
Project Period (FY) |
2012-04-01 – 2016-03-31
|
Keywords | マグニチュード / 津波警報 |
Outline of Final Research Achievements |
We derived a set of the coefficients of the magnitude formula using high frequency seismic signal durations and maximum displacement amplitudes measured from regional data by a grid search approach. We showed that tsunami earthquakes were characterized by small displacement amplitudes and long high frequency seismic signal durations measured from regional data. We revised a set of the magnitude formula coefficients for tele-seismic data. We measured strong motion durations and maximum displacement amplitudes. Their products with epicentral distances show a good correlation with moment magnitudes. We developed a method to determine the end point of rupture using high frequency seismic signal durations from tele-seismic data.
|
Free Research Field |
固体地球惑星物理
|