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Serious topography effects. Shots 1950-2000 show effect of coming off northern ridge segment. Odd shift in first arriving phase likely due to topography? Interesting though. Could be small LVZ associated with NRZ? Same bright spot is seen on 09_1701-1950 high end. High amplitude arrivals throughout center of record (shots 2030-2140) are at ranges of ~35-45. Amplitude likely due to cross over. But no obvious PmP or Pn. 300 m seafloor bump which spans ~ 10 shots (2.5 km) is enough to interrupt first arrivals. Shots near 2140 are good example of this. Break in pickable first arrivals. |