Title:
ESTIMATION METHOD FOR EPICENTRAL DISTANCE AND MAGNITUDE AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3695579
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an estimation method for an epicentral distance and a magnitude and a device therefor capable of estimating the epicentral distance and the magnitude from parameters obtained by quantifying the shape of a wave form by fitting it by a simple function having several parameters.
SOLUTION: This estimation device for the epicentral distance and the magnitude is provided with: a seismometer 1; a memory 14 for storing digital wave form data of first ground movement from the seismometer 15 and a parameter calculation part 15 for removing an offset, taking the absolute value of the data, smoothing the wave form, fitting it with an equation of y=Bt.e-At to obtain the parameters A and B, finding the epicentral distance from the found parameter B, and finding the maximum amplitude value within a reference period based on the epicentral distance or the magnitude from the found parameter A.
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Inventors:
Ashiya Kominori
Shunichi Odaka
Shinya Tabata
Shinji Sato
Kazuo Otake
Daisuke Nosaka
Shunichi Odaka
Shinya Tabata
Shinji Sato
Kazuo Otake
Daisuke Nosaka
Application Number:
JP2001079739A
Publication Date:
September 14, 2005
Filing Date:
March 21, 2001
Export Citation:
Assignee:
Railway Technical Research Institute
Japan Meteorological Agency
Japan Meteorological Agency
International Classes:
G01V1/28; (IPC1-7): G01V1/28
Domestic Patent References:
| JP4047498A | ||||
| JP11064533A |
Other References:
中村 豊,中村 豊,第二回土木学会リアルタイム地震防災システムシンポジウムで講演,日本,2000年 5月
Attorney, Agent or Firm:
Mamoru Shimizu
Makoto Kawai
Makoto Kawai