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    Guides to Seismometer Installation, Adjustment, Calibration and Interpretation

*

  • Seismometer Calibration
  • Period Lengthening

Abramowitz and Stegun: Handbook of Mathematical Functions

Books in Fortran

 

shadow_zone

The shadow zone is the area of the earth from angular distances of 104 to 140 degrees that, for a given earthquake, does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.

 

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