scholarly journals Relocation of Intermediate-depth Earthquakes beneath the NE Japan Arc by Double-Difference Location Method

2006 ◽  
Vol 59 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Junichi SUGANOMATA ◽  
Tomomi OKADA ◽  
Akira HASEGAWA ◽  
Koji SAKODA ◽  
Stephen H. KIRBY
Keyword(s):  
Double Difference ◽  
Intermediate Depth ◽  
Location Method ◽  
Ne Japan

scholarly journals Earthquake relocation for North-Western Greece using 3D crustal model; method comparison and seismotectonic interpretation.

2016 ◽  
Vol 47 (3) ◽  
pp. 1269 ◽  
Author(s):  
O. Stavroulopoulou ◽  
E. Sokos ◽  
N. Martakis ◽  
G. A. Tselentis
Keyword(s):  
Standard Procedure ◽  
Method Comparison ◽  
Velocity Model ◽  
Focal Mechanisms ◽  
Double Difference ◽  
Location Method ◽  
Hypocenter Distribution ◽  
3D Velocity Model ◽  
1D Model ◽  
Northwestern Greece

A dense microseismic network was installed in Northwestern Greece for a period of eleven months. A total of 1368 events were recorded and located using a 1D model. These events were also used to derive a 3D velocity model for the area. This work presents results from further processing of the data using (a) simple location method of events in a 1D medium through Hypo71 standard procedure; (b) location via the probabilistic, non-linear earthquake location method in 3D medium; (c) relocation of the events using the Double - Difference method in 1D medium; and (d) the same relocation  procedure  invoking  3D  medium.  The  application  of  different  location methodologies results in slightly different locations, which are evaluated using as criterion the compactness of hypocenter distribution. The three point method was used in order to derive linear characteristics from the hypocenter distribution and the final results were compared against the focal mechanisms of the events as computed using the polarity method and the 3D velocity model. The combination of accurately computed hypocenters and focal mechanisms provides important information for the seismotectonics of Epirus

Imaging the heterogeneous source area of the 2003 M6.4 northern Miyagi earthquake, NE Japan, by double-difference tomography

2007 ◽  
Vol 430 (1-4) ◽  
pp. 67-81 ◽  
Author(s):  
Tomomi Okada ◽  
Akira Hasegawa ◽  
Jun'ichi Suganomata ◽  
Norihito Umino ◽  
Haijiang Zhang ◽  
...  
Keyword(s):  
Source Area ◽  
Double Difference ◽  
Heterogeneous Source ◽  
Ne Japan
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