Earthquake extraction and correlation energy at Long Beach, California seismic survey

Results

All figures show correlation results with the same virtual source location and at the same acausal and causal time lags ($-4$  seconds and $4$  seconds, respectively). Figure 6 and Figure 7 show the acausal and causal Green's functions from the $12.5$  hours of correlations from January $21$ to January $22$ . Figure 8 and Figure 9 show the acausal and causal Green's functions from the $12$  hours of correlations from February $20$ to February $21$ . Figure 10 and Figure 11 show the acausal and acausal Green's functions from the $14$  hours of correlations from February $27$ to February $28$ . Gaps in the array overlap with parts of the CSU Long Beach campus.

corr-Jan22-acausal-snap Figure 6. Snapshot of the Green's function at $-4$  second (acausal) time lag from the $12.5$  hours of correlations from January $21$ to January $22$ .

corr-Jan22-causal-snap Figure 7. Snapshot of the Green's function at $4$  second (causal) time lag from the $12.5$  hours of correlations from January $21$ to January $22$ .

corr-Feb21-acausal-snap Figure 8. Snapshot of the Green's function at $-4$  second (acausal) time lag from the $12$  hours of correlations from February $20$ to February $21$ .

corr-Feb21-causal-snap Figure 9. Snapshot of the Green's function at $4$  second (causal) time lag from the $12$  hours of correlations from February $20$ to February $21$ .

corr-Feb28-acausal-snap Figure 10. Snapshot of the Green's function at $-4$  second (acausal) time lag from the $14$  hours of correlations from February $27$ to February $28$ .

corr-Feb28-causal-snap Figure 11. Snapshot of the Green's function at $4$  second (causal) time lag from the $14$  hours of correlations from February $27$ to February $28$ .

Earthquake extraction and correlation energy at Long Beach, California seismic survey