Seismic method

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Seismic method

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??? 1-1 ???????????????????? (K.Watana)
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??? 2-1 ?????????????????????????? ???????????
particle ???????????????????????????????? scale
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??? 2-2 Idealized normal stress model
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??? 2-3 Idealized strain model
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??? 2-4 Dilatation and Rotation
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??? 2-5 ????????????? 2 ????
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Body wave ?????????????????????
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Surface wave ????????????? ???????
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2-6 Primary (P) wave particle motion is in the
direction of propagation.
Primary wave
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Secondary (shear) wave
2-7 Secondary (S) wave particle motion is
perpendicular to the direction of propagation.
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2-8
Surface wave Rayleigh wave (ground roll )
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Distinguish between P S wave
P-wave S-wave
Compressional Shear
Longitudinal Transverse
Irrotational Rotational
Primary arrival Secondary arrival
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Waves detected at earthquake station
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Vp - Vs and poisons ratio
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2-11 Other important elastic property
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2-12 Vp ??? Vs ??????????????????????????????????
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