Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis

Details Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pepi..104...63y&link_type=abstract

Physics of the Earth and Planetary Interiors, v. 104, p. 63-73.

Physics

5

Scientific paper

The short-wavelength crustal heterogeneity is investigated in the Nikko area (Central Japan), using a three-component seismogram envelope analysis applied to small local earthquakes. We stochastically model fluctuations in crustal density and seismic wave velocities by using an exponential auto-correlation function. The model parameters are correlation length a and root mean square (rms) fractional fluctuation strength ɛ. Free surface and non-spherical source radiation effects are incorporated in the synthesis of three-component seismogram envelopes. We use 149 short-period seismograms recorded by array stations from 10 local earthquakes with magnitudes 1 ~ 2 and epicentral distances less than 15 km. A best fit minimum residual between observed and synthetic envelopes in the frequency band of 8 ~ 16 Hz gives ɛ2/a ~= 8 × 10-6 m-1. With the additional information on the strength of direct wave attenuation and the excitation of coda waves at low frequencies, we estimate that a = 300 ~ 800 m and ɛ = 5 ~ 8%. This strong heterogeneity and short correlation length probably reflect the geological condition of the Nikko area which is located in the vicinity of the volcanic front.

Affiliated with

Also associated with

No associations

Rating

Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis 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 Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short-wavelength crustal heterogeneities in the Nikko area, Central Japan, revealed from the three-component seismogram envelope analysis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1607321