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Authors: Amoruso, A.* 
Crescentini, L.* 
De Luca, G.* 
Scarpa, R.* 
Abril, M.* 
Cirella, Al.* 
Title: Underground earth strain and seismic radiation measurements with a laser interferometer and a dense small-aperture seismic array
Issue Date: Oct-1997
Series/Report no.: 5/40 (1997)
Keywords: strain
seismic array
Subject Classification04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques 
Abstract: This paper describes two geophysical instruments, installed in the underground physics laboratories of Gran Sasso (LNGS-INFN), located in the seismic zone of the Central Apennines, Italy. These instruments monitor strain and seismic radiation with very high sensitivity: one is a 90 m-long laser interferometer, sensitivity 3 x 10-12, frequency response 10-7-10-2 Hz, and has been operating since 1994. The other is a small-aperture seismic array composed of 21 three-component short period (Mark L4C-3D) and 3 broadband (Guralp CMG-3ESP) seismometers. This dense array will be in operation at the beginning of 1998.
Appears in Collections:Annals of Geophysics

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