Broadband Seismometer Motion
Broadband Seismometer Motion : Completely irregular (stochastic) motion of smallest particles suspended in a liquid or gas, first described by the British botanist Robert Brown in 1827. The diffusion intensity of B.m.m. increases with temperature and is explained in a physically and mathematically tractable form by the theories of Einstein (1905) and Smoluchowski (1906). It plays a role in the temperature-dependent diffusive internal friction and thus anelasticity of Earth materials, the related attenuation of seismic waves and may also be one of the causes of instrumental noise of seismic sensors (See: Section 5.5.5 in Chapter 5 of this Manual)
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