Abstract
— The time variation of two parameters related to accelerating seismic deformation before strong earthquakes in the Aegean area is examined. The first is the b parameter of the Gutenberg-Richter relation and the second is the curvature parameter C, which is a measure of deviation of the accelerating preshock deformation from a linear time variation of this deformation. Following two different procedures, it was found that the b value exhibits a decreasing trend prior to the oncoming earthquake, in agreement with the results of laboratory experiments and other independent observations. C values also show a decreasing trend before main shocks. These results indicate that such time variations of these parameters can be considered as precursory phenomena of ensuing strong earthquakes.
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(Received August 8, 2000, accepted November 27, 2001)
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Karakaisis, G., Savvaidis, A. & Papazachos, C. Time Variation of Parameters Related to the Accelerating Preshock Crustal Deformation in the Aegean Area. Pure appl. geophys. 160, 1479–1491 (2003). https://doi.org/10.1007/s00024-003-2356-6
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DOI: https://doi.org/10.1007/s00024-003-2356-6