MT & Seismic Data
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M
b
5.1 San Juan Bautista, CA,
8/12/98
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10 sec of MT & seismic data
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Seismic are 1 Hz & 80 Hz
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MT is sensitive to ground
motion; surface waves
displace electric dipole
cables and induction coils
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MT similarly effected by
wind, cultural noise, etc