Spatiotemporal features of the Earth's background oscillations observed in central Europe

Details Spatiotemporal features of the Earth's background oscillations observed in central Europe Spatiotemporal features of the Earth's background oscillations observed in central Europe

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3324304k&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 24, CiteID L24304

Physics

5

Geodesy And Gravity: Ocean/Earth/Atmosphere/Hydrosphere/Cryosphere Interactions (0762, 1218, 3319, 4550), Seismology: Surface Waves And Free Oscillations, Seismology: Seismic Instruments And Networks (0935, 3025)

Scientific paper

We present a continuous analysis of the background oscillations of the Earth. We processed five years of vertical recordings from the German Regional Seismic Network (GRSN) and estimated the directions of arrival (DOA) of the background Rayleigh waves in the frequency range between 5 and 8 mHz. We find clear seasonal variations in the direction of propagation and a striking rate of recurrence in these seasonal patterns. This seasonality provides evidence of an excitation of the background oscillations by large-scale atmospheric and/or oceanic processes which confirms previous studies.

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