Body-to-surface-wave scattered energy in teleseismic coda observed at the NORESS seismic array

摘要: Abstract Teleseismic data recorded at the NORESS seismic array are examined to determine degree and scale of lithospheric heterogeneities beneath locate local scattering sources. The using relative coda intensity envelopes, frequency-wavenumber spectra, particle motion polarizations. envelopes do not exhibit any clear ka trends; 0.5-Hz pass-band does, however, contain higher energy levels a high packet ∼ 15 sec after first arrival. Frequency-wavenumber analysis shows that most teleseismic is vertically propagating. window centered near sec, contains traveling northeast low apparent velocity. Particle motions in this follow retrograde elliptical pattern characteristic Rayleigh surface waves. source presumed be responsible for observed body-to-surface-wave scattered Lake Mjosa located approximately 30 km west-southwest array.