Detection of electromagnetic earthquake precursory signals in Greece

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概要

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• Electromagnetic (EM) anomalies were detected in a wide frequency band prior to the two strongest earthquakes that occurred in Greece during 1995, i.e., at Kozani-Grevena and Egio-Eratini areas. The analysis of these EM anomalies indicates that these EM anomalies should be pre-seismic ones. Two basic characteristics emerged: (i) The lead time of each disturbance was systematically smaller in the case of Kozani-Grevena earthquake than that of the Egio-Eratini earthquake. (ii) An almost simultaneous cessation of the EM anomalies, although they had different onset times and were detected in a wide frequency range. As for the seismic activity that occurred in Greece during the last year, pre-seismic EM anomalies were detected before (i) the September 7, 1999, Athens earthquake and (ii) other smaller EQs. The possibility to predict the parameters of an impending EQ from the EM anomalies is also investigated.

• 日本学士院の論文

著者

• BOGRIS Nikos

  Solid Earth Physics Institute, University of Athens

• EFTAXIAS Kostas

  Solid Earth Physics Institute, University of Athens

• KOPANAS John

  Solid Earth Physics Institute, University of Athens

• KAPIRIS Panayiotis

  Solid Earth Physics Institute, University of Athens

• ANTONOPOULOS George

  Solid Earth Physics Institute, University of Athens

• VAROTSOS Panayiotis

  Solid Earth Physics Institute, University of Athens

• Varotsos Panayiotis

  Solid Earth Physics Institute University Of Athens

• Eftaxias Kostas

  Department Of Physics University Of Athens

• Bogris Nikos

  Solid Earth Physics Institute University Of Athens

関連論文

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• A new approach in the determination of charasteristic directions of the geoelectric structure using Mohr circles
• Detection of electromagnetic earthquake precursory signals in Greece
• What happened before the last five strong earthquakes in Greece: Facts and open questions
• VHF-electromagnetic evidence of the underlying pre-seismic critical stage
• Magnetovariational and Magnetotelluric study of Ioannina region sensitive to Seismic Electric Signals (SES). I
• Magnetic field variations associated with the SES before the 6.6 Grevena-Kozani earthquake
• Magnetic field variations associated with SES : The instrumentation used for investigating their detectability
• A plausible universal behaviour of earthquakes in the natural time-domain
• On the difference in the rise times of the two SES electric field components
• Field experimentation on the detectability of co-seismic electric signals

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