Main results of the VAN telemetric network

The real time operation of the network enables the real time identification of the precursory variations of the electric (and the magnetic) field of the earth at measuring stations installed at various sites in Greece. The low frequency precursory electric signals, introduced by the VAN group are termed Seismic Electric Signals (SES). A series of SES recorded within short time is termed SES acivity. The SES in combination with their natural time analysis (explained below), enables the predictions of the impending earthquakes which (if the estimated magnitude is 6.0 or larger) are publicized in advance in the scientific web site of Cornell University Library www.arXiv.org and submitted for publication to international scientific journals. As a particular example, we refer to the major earthquakes that occurred in Greece during 2008 including the MW6.9 earthquake on 14 February 2008 in southwestern Peloponnese which was the strongest earthquake in Greece during the last 35 years. The precursory electric signals of this earthquake are depicted below and have been publicized two weeks in advance on 1 February 2008 (Varotsos et al., arXiv:0711.3766v3 [cond-mat.stat-mech] (1 February 2008)). The approach of the system to the critical point was identified by means of natural time analysis (see below) on 10 February 2008 which has been publicly announced (ETHNOS newspaper article). This major earthquake occurred four days later and arouse a considerable international interest, e.g., see the article by Japanese scientists in EOS Transactions of the American Geophysical Union [S. Uyeda and M. Kamogawa, EOS 89, No. 39, 23 September 2008]