Editing Attenuation (section)

== Seismic ==
The energy with which an [[earthquake]] affects a location depends on the running [[distance]]. The attenuation in the signal of [[ground motion]] intensity plays an important role in the assessment of possible strong groundshaking. A [[seismic wave]] loses [[energy]] as it propagates through the [[earth]] ('''seismic attenuation'''). This [[phenomenon]] is tied into the [[Dispersive mass transfer|dispersion]] of the seismic energy with the distance. There are two types of [[dissipated]] energy:

* geometric dispersion caused by distribution of the seismic energy to greater volumes
* dispersion as heat, also called intrinsic attenuation or anelastic attenuation.

In [[Porosity#Porosity of rocks|porous]] fluid—saturated [[sedimentary rocks]] such as [[sandstones]], intrinsic attenuation of seismic waves is primarily caused by the wave-induced flow of the pore fluid relative to the solid frame.
<ref>{{cite journal |last1=Müller |first1=Tobias M. |last2=Gurevich |first2=Boris |last3=Lebedev |first3=Maxim |title=Seismic wave attenuation and dispersion resulting from wave-induced flow in porous rocks — A review |journal=Geophysics |date=September 2010 |volume=75 |issue=5 |pages=75A147–75A164 |doi=10.1190/1.3463417|bibcode=2010Geop...75A.147M |hdl=20.500.11937/35921 |hdl-access=free }}</ref><ref>{{cite book |last1=Gurevich |first1=Boris |last2=Carcione |first2=José M. |title=Attenuation and Dispersion of Elastic Waves in Porous Rocks: Mechanisms and models |url=https://library.seg.org/doi/10.1190/1.9781560803911 |publisher=Society of Exploration Geophysicists |access-date=26 February 2023 |language=en |doi=10.1190/1.9781560803911 |date=2022|isbn=978-1-56080-390-4 }}</ref>