The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 1992
Filed:
Jan. 04, 1991
Applicant:
Inventors:
Kozo Takahashi, Higashi-Kurume-shi, Tokyo, JP;
Yukio Fujinawa, Tsuchiura-shi, Ibaraki-ken, JP;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; G01S / ; G01S / ;
U.S. Cl.
CPC ...
367125 ; 367129 ; 364420 ; 364421 ;
Abstract
The source region of a volcanic tremor is determined by simultaneously detecting the tremor using seismometers installed at at least four separate points, obtaining correlation functions among pairs of the detected values, calculating at least three observation time lags corresponding to the maximal values of the correlation functions, and using the at least three observation time lags for determining the source region of the volcanic tremor.