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Free oscillation modes. Spheroidal mode (analogous to the P, SV and Rayleigh waves). Motions are parallel to the radial direction. Sensitive to gravity, or density. n S l Toroidal mode (analogous to SH or Love waves). n T l. Spheroidal mode (example). Spheroidal mode (example).
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Free oscillation modes • Spheroidal mode (analogous to the P, SV and Rayleigh waves). Motions are parallel to the radial direction. Sensitive to gravity, or density. nSl • Toroidal mode (analogous to SH or Love waves). nTl