Vol. 53, n.1, March 2012
Statistical and spectral properties of the LAquila EQL in 2009
(Received: October 8, 2010; accepted: January 24, 2011)
A great number of earthquake lights (EQL) were observed in association with the
LAquila earthquake of April 6, 2009. A previous comparison of EQL locations and
the geology of the epicentres showed some possible association of EQL types with
ground characteristics, while the association between sighting and shock times divided
the co-seismic EQL types into pre-seismic and post-seismic ones. In this report, EQL
colours are considered with respect to EQL types, positions and times. A digital
method, taking into account witness distribution, to correct the statistical properties of
EQL distribution was proposed. A Radial Distribution Function and time distribution
were calculated. Accelerating EQL time distribution and correlation length
fluctuations with earthquake were observed when approaching the principal shocks.
The power law model produced good fits for the distributions.
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