of Groundwater Chemical Composition in Kamchatka
in Relation to the Strong (MW
6.6) Earthquakes
G. N. Kopylova and L. N. Taranova
Kamchatka Branch of the Geophysical Survey, Russian Academy of Sciences,
bulv. Piip 9, Petropavlovsk-Kamchatskii, 683006 Russia
Received July 25, 2012; in final form, November 22, 2012
Abstract—We consider the results of the statistical analysis using the methods of the principal components and
canonical coherences applied to the processing of long (1986–2005) time series of hydrogeochemical observa-
tions at the flowing wells and springs in Kamchatka. The time-frequency diagrams of the evolution of informa-
tive statistics characterizing the collective behavior of multidimensional hydrogeochemical time series are con-
structed, and the time intervals and frequency bands where the synchronization signals (Lyubushin, 2007)
appear are identified. The features of their occurrence are analyzed in comparison to the strong (Mw = 6.6–7.8)
local earthquakes. It is found that such signals in the measurements of some multidimensional time series can
arise both before and after earthquakes, i.e. these signals have a precursory (P2) and postseismic (P3) character.
DOI: 10.1134/S106935131304006X
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