S51C-2699
Quantifying Atmosphere-Ground Coupling in the Central and Eastern United States with the Transportable Array
Quantifying Atmosphere-Ground Coupling in the Central and Eastern United States with the Transportable Array
Friday, 18 December 2015
Poster Hall (Moscone South)
Abstract:
Through differential pressure loading, atmospheric disturbances can propagate into the ground. For shallow seismometer installations these atmogenic signals serve to increase noise and potentially obscure seismic information. As such, it is prudent to understand atmosphere-ground coupling efficacy and mechanisms in order to improve seismometer deployment plans and maximize seismic signal retrieval.In mid 2010 the USArray's Transportable Array network began deploying with additional meteorologic sensors. Since then, over 600 sites in central and eastern United States have had collocated seismic and meteorologic sensors continuously measuring seismic and atmospheric signals. We studied atmosphere-ground coupling by mapping the coherence between the varied signals. We see geographic regions of high coherence between the infrasound signal and both the N-S and E-W seismic channels, while little to no coherence is ever observed between the analyzed atmospheric signals and the vertical seismic component.