A non-extensive statistical physics view to the spatiotemporal properties of the June 1995, Aigion earthquake (M6.2) aftershock sequence (West Corinth rift,Greece)     

Filippos Vallianatos  Giorgos Michas  Giorgos Papadakis  Peter Sammonds 《Acta Geophysica》2012,60(3):758-768

In the present study, the spatiotemporal properties of the Aigion earthquake (15 June 1995) aftershock sequence are being studied using the concept of non-extensive statistical physics (NESP). The cumulative distribution functions of the inter-event times and the inter-event distances are being estimated for the data set which is assumed to be complete and the analysis yielded the thermodynamic q parameter to be qT = 1.58 and q _r = 0.53 for the two distributions, respectively. The results fit rather well to the inter-event distances and times distributions, implying the complexity of the spatiotemporal properties of seismicity and the usefulness of NESP in investigating such phenomena. The temporal structure is also being discussed using the complementary to NESP approach of superstatistics, which is based on a superposition of ordinary local equilibrium statistical mechanics. The result indicates that very low degrees of freedom describe the temporal evolution of the Aigion earthquake aftershock seismicity.  相似文献   

Dynamic Multifractality in Earthquake Time Series: Insights from the Corinth Rift,Greece     

Georgios Michas  Peter Sammonds  Filippos Vallianatos 《Pure and Applied Geophysics》2015,172(7):1909-1921

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Hydrogen sulphide as a natural air contaminant in volcanic/geothermal areas: the case of Sousaki,Corinthia (Greece)     

W. D’Alessandro  L. Brusca  K. Kyriakopoulos  G. Michas  G. Papadakis 《Environmental Geology》2009,57(8):1723-1728

Volcanic and geothermal areas are one of the major natural sources of H₂S to the atmosphere. Its environmental impact is often the main cause of the opposition to the development of geothermal energy exploitation programs. In this paper, we analyze the air concentrations and dispersion pattern of naturally emitted H₂S at the geothermal area of Sousaki (Corinthia, Greece). Measurements, made with a network of passive samplers, evidence a rapid decrease of concentration values away from the emission points. The fact that the decrease is more pronounced in the summer with respect to the winter indicates that it is not only due to a dilution effect, but also to redox reactions favored by higher temperatures and intense sunlight typical of the summer period.  相似文献   

Aftershock patterns of the 2021 Mw 6.3 Northern Thessaly (Greece) earthquake     

Michas  Georgios  Pavlou  Kyriaki  Avgerinou  Sophia-Ekaterini  Anyfadi  Eleni-Apostolia  Vallianatos  Filippos 《Journal of Seismology》2022,26(2):201-225

Journal of Seismology - On March 3, 2021, a strong shallow earthquake of magnitude Mw 6.3 struck Northern Thessaly, an area that lies in one of the most active fault zones of mainland Greece. The...  相似文献   

Methana,the westernmost active volcanic system of the south Aegean arc (Greece): Insight from fluids geochemistry     

W. D'Alessandro  L. Brusca  K. Kyriakopoulos  G. Michas  G. Papadakis 《Journal of Volcanology and Geothermal Research》2008

An extensive geochemical survey of the fluids released by the volcanic/geothermal system of Methana was undertaken. Gases were characterized based on the chemical and isotopic [helium (He) and carbon (C)] analysis of 27 samples. Carbon dioxide soil gas concentration and fluxes were measured at 179 sampling sites throughout the peninsula. Forty samples of thermal and cold groundwaters were also sampled and analysed to characterize the geochemistry of the aquifers.  相似文献