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6 Acta Geophysica Polonica

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Additional evidence on some relationship between seismic electric signals and earthquake source parameters

Varotsos P., Sarlis N., Skordas E., Tanaka H., Lazaridou M.

Acta Geophysica Polonica

2005

Vol. 53, nr 3

293-298

We provide recent experimental evidence which further supports the inter-relation between the earthquake source parameters and the selectivity properties of Seismic Electric Signals. The cases of two major earthquakes with magnitudes larger than 6.0, that occurred in Greece during 2004-2005, are presented.

SES activity recorded at Keratea station on April, 2003

Varotsos P., Sarlis N., Skordas E., Lazaridou M.

Acta Geophysica Polonica

2004

Vol. 52, nr 1

45-48

Two notes on the seismic electric signals recorded at the Keratea station, Greece, are presented. Both these signals as well as the subsequent seismic activ-ity have been analysed in the natural time domain. They have been finally fol-lowed by a 4.7 earthquake on June 13, 2003 with an epicenter at 38.6N, 23.7E (i.e., around 65 km north of Athens).

Four notes on SES activity at the Ioannina Observatory, Greece

Varotsos P., Sarlis N., Skordas E., Lazaridou M.

Acta Geophysica Polonica

2003

Vol. 51, nr 2

147-153

Four notes are presented on the seismic electric signals recorded at the Ioannina Observatory, Greece and their relation to the seismicity of the area. The motes were issued between November 2, 2002 and January 12, 2003.

Seismic electric signals and seismicity: on a tentative interrelation between their spectral

Varotsos P., Sarlis N., Skordas E.

Acta Geophysica Polonica

2002

Vol. 50, nr 3

337-354

We show that the spectral content of the seismic activity, in the area candidate to suffer an earthquake and which evolves consecutively in time with every new event, falls on the spectral content of the Seismic Electric Signals (SES) activity, just before the occurrence of the main shock. The key point is that both spectra have to be defined and calculated in a new time domain, termed as "natura1" time. Thus, since the spectrum of the SES is known well in advance, the continuous inspection of the spectrum of the evolving seismic activity may lead to an estimation of the time window of the impending main shock with an accuracy of around a few days. Both spectra exhibit a feature compatible with that obtained from the theory of dynamic phase transitions (critical phenomena).

Note on an important SES activity at Ioannina station (IOA)

Varotsos P., Sarlis N., Skordas E., Lazaridou M.

Acta Geophysica Polonica

2002

Vol. 50, nr 3

355-359

A note on the extent of the SES sensitive area around Lamia (LAM), Greece

Varotsos P., Eftaxias K., Hadjicontis V., Bogris N., Skordas E., Kapiris P., Lazaridou M.

Acta Geophysica Polonica

1999

Vol. 47, nr 4

435-444