HR: 17:30h
AN: NG12C-07    [PDF]
TI: Multiscale Trend Analysis of Temporal (Un)Correlations Between Coda Q and Seismicity in California
AU: * Zaliapin, I
EM: zal@ess.ucla.edu
AF: Institute of Geophysics and Planetary Physics, UCLA, 3845 Slichter Hall, Los Angeles, CA 90095-1567 United States
AU: * Zaliapin, I
EM: zal@ess.ucla.edu
AF: International Institute for Earthquake Prediction Theory and Mathematical Geophysics, Russian Ac. Sci., Warshavskoe sh., 79, korp. 2, Moscow, 113556 Russian Federation
AU: Jin, A
EM: ajin@bosai.go.jp
AF: Association for the Development of Earthquake Prediction, Japan, Tokyo, 101-0064 Japan
AU: Jin, A
EM: ajin@bosai.go.jp
AF: National Research Institute for Earth Sciences and Disaster Prevention, Tsukuba, Ibaraki, 300-0006 Japan
AU: Liu, Z
EM: zliu@ess.ucla.edu
AF: Department of Earth and Space Sciences, UCLA, 3845 Slichter Hall, Los Angeles, CA 90095-1567 United States
AU: Aki, K
EM: aki@ipgp.jussieu.fr
AF: Association for the Development of Earthquake Prediction, Japan, Tokyo, 101-0064 Japan
AU: Keilis-Borok, V
EM: vkb@ess.ucla.edu
AF: Institute of Geophysics and Planetary Physics, UCLA, 3845 Slichter Hall, Los Angeles, CA 90095-1567 United States
AU: Keilis-Borok, V
EM: vkb@ess.ucla.edu
AF: International Institute for Earthquake Prediction Theory and Mathematical Geophysics, Russian Ac. Sci., Warshavskoe sh., 79, korp. 2, Moscow, 113556 Russian Federation
AU: Keilis-Borok, V
EM: vkb@ess.ucla.edu
AF: Department of Earth and Space Sciences, UCLA, 3845 Slichter Hall, Los Angeles, CA 90095-1567 United States
AB: We introduce a statistical technique, based on the recently developed Multiscale Trend Analysis (MTA), for quantifying correlations between non-stationary processes observed at irregular non-coincident time grids. This technique is applied to studying the temporal correlation between the dynamics of the ductile and brittle layers in the Earth lithosphere. Our results confirm the previously reported strong positive correlation between the coda Q inverse and seismicity and its drop before major earthquakes observed in California. The proposed technique has significant advantages over the conventional correlation analysis: (1) MTA allows one to work directly with non-coincident time series without preliminary resampling the data; (2) The correlation is defined via the stable objects --- trends --- rather than noisy individual observations, hence it is highly robust; (3) The correlations are quantified at different time scales. The suggested technique seems promising for the wide range of applied problems dealing with coupled time series.
DE: 3220 Nonlinear dynamics
DE: 3250 Fractals and multifractals
DE: 3299 General or miscellaneous
SC: Nonlinear Geophysics [NG]
MN: 2003 Fall Meeting