Open AccessUnderground earth strain and seismic radiation measurements with a laser interferometer and a dense small-aperture seismic array
Author(s) -
Antonella Amoruso,
Luca Crescentini,
Giovanni De Luca,
Roberto Mario Scarpa,
María de las Mercedes Abril,
A. Cirella
Publication year - 1997
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-3841
Subject(s) - seismometer , interferometry , seismology , geology , aperture (computer memory) , passive seismic , broadband , laser , vertical seismic profile , geophone , optics , seismic interferometry , radiation , seismic array , sensitivity (control systems) , physics , acoustics , engineering , electronic engineering
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