| Figure 5. Catalog locations, relocations, and 90% confidence ellipses for possible secondary rupture events. All occurred during the appropriate time window (08NOV1997-02DEC1997). Relocations were determined using propagation path corrections (PPCs) when available and only those stations common to both events (i.e., ASAR, CMAR, FINES, GERES, HYB, LSA, MAKZ, SHL, WRA). IASP91 (red), SSB (green) (Jih, 1998), and TIBET (blue) (Jih, 1998) velocity models were used for the relocations. A third candidate event (lower left) was discarded due to low signal-to-noise ratio and relocation instability. The relocated epicenters display the approximate separation suggested in Figure 4. This suggests that neither event is related to the secondary rupture. | |