Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data

Details Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ep%26s...61.1287m&link_type=abstract

Earth, Planets and Space, Volume 61, p. 1287-1295.

Computer Science

1

Scientific paper

Local earthquakes observed at Sendai, Japan, were analyzed to confirm the validity of a method of polarization analysis using the spectral matrix of seismic wave and its application to seismic reflection studies of the crust using local earthquake data. Reflectors (Bright spots) are known below the Nagamachi-Rifu fault, which caused an M 5.0 class event in 1998. Polarization analysis was applied to earthquake data in and around the fault. Use of the Z-parameter, which is defined using the eigenvalues of the spectral matrix and a statistical value representing the confidence level for the detection of the arrival of polarized waves, allowed detection of linearly and elliptically polarized waves in coda waves. The Z-parameter was also used to image the reflectors by using a migration technique that assumes the P × P and S × S reflection waves travel through a multi-layered velocity structure. Distinct reflectors were detected at depths of around 10 km, 14 km, 17 km, 21-26 km, 35 km and 40 km, that is, from deeper than the fault and the Moho. This study demonstrated the feasibility of using the spectral matrix of three-component seismic signal to detect polarized waves and to image reflectors in the earth's crust and upper mantle.

Affiliated with

Also associated with

No associations

Rating

Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral matrix analysis for detection of polarized wave arrivals and its application to seismic reflection studies using local earthquake data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1887068