The Location of Meteorite Impacts by Seismic Methods

Nicholls, David C.; Stewart, Ian

doi:10.1111/j.1945-5100.1974.tb00078.x

Cited by 1 publication

(1 citation statement)

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“…Only very large (and extremely rare) meteorite impacts retain a sufficient fraction of their original velocity to reach the Earth with enough energy to produce explosive-type craters [Bland and Artemieva, 2006]. Excluding the improbable scenario of impact occurring very close to a seismograph station, direct seismic detection of meteorite impact is effectively limited to objects greater than $50 kg [Nicholls and Stewart, 1974]. Travel via surface speeds allows these waves to arrive prior to (e) direct coupling of the atmospheric pressure wave with the surface at the site of the seismic station (gray triangle).…”

Section: Seismic Detection Of Meteorite Impactmentioning

confidence: 99%

Seismic observations of meteors: Coupling theory and observations

Edwards

Eaton

Brown

2008

Reviews of Geophysics

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[1] Over the last century, seismic instruments have recorded, with increasing frequency, the ground motion produced by meteorically generated shock waves striking the Earth's surface. In this review, the history of meteorrelated seismic signals is discussed, along with documented waveform characteristics, source mechanisms, air-ground coupling phenomena, and kinematic methods of determining meteor trajectories and event locations. Uncertainties in the mechanics of air-ground coupling, however, have left methods of measuring meteor source energy underdeveloped.To date, coupling of acoustic waves directly with the Earth's surface represents the bulk of the observed meteor-related seismic signals, while precursory and impact-related seismic waves remain an observational rarity. With proliferation of infrasound and seismic monitoring systems, new opportunities exist to explore the relationship between Earth's atmosphere and surface. Continued study of meteor seismology will lead to new methods to constrain energies, sizes, and fluxes for moderately (cm to m) sized meteoroids on Earth and potentially on Mars.

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Section: Seismic Detection Of Meteorite Impactmentioning

confidence: 99%