Abstract We use 220 hours of seismic data recorded by globally-distributed seismic station after the MW9.3 earthquake at Japan on 2011-03-11.This paper selects 448 sets of vertical components of seismic waves with higher-quality, based on a certain criterion, and adopts the frequency-domain AR method to estimate the frequency and quality factor for the normal mode 0S0. After determining the weighted averages with signal-to-noise ratio (SNR) as the weights, the estimated results are f=0.814 658 4±5.3×10-7 and Q=5 586±12. The two estimations have higher precision than previous results, which can improve the existing earth models to bring them closer to the real earth.
ZHOU Fengsen,WANG Dijin,DAN Zeng. Estimation on Eigenfrequencies and Quality Factors for the Normal Mode 0S0 Based on the Global Seismic Data[J]. jgg, 2019, 39(10): 1013-1016.
ZHOU Fengsen,WANG Dijin,DAN Zeng. Estimation on Eigenfrequencies and Quality Factors for the Normal Mode 0S0 Based on the Global Seismic Data[J]. jgg, 2019, 39(10): 1013-1016.