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Vol. 55, n.2, June 2014
pp. 561-587

A real-time seismic and tsunami network in the Kyparissiakos Gulf, Greece

J. MAKRIS, J. PAPOULIA and A. TSAMBAS

Received: March 1, 2011; accepted: July 18, 2013

Abstract

A real-time on/offshore seismic and tsunami network was installed in the Kyparissiakos Gulf, south-western Greece, transmitting data by satellite and GPRS (mobile telephony) connection, and exploiting the Internet possibilities. The network consisted of one marine station for seismic and tsunami observations located offshore Zakynthos Island, three land stations at Killini, Pirgos and Keri-Zakynthos, transmitting data through mobile telephony, and one seismic station placed on the Island of Strophades that used a satellite link. The buoy and satellite stations were equipped with broadband 3C CME4011 seismic sensors of 30 s to 50 Hz, while all other locations used 3C refraction geophones of 4.5 Hz natural frequency. A high sensitivity pressure sensor for tsunami and tidal observations was attached to the marine seismic station at the seafloor. The marine real-time seismic and tsunami station originally developed for a microseismicity study in central Greece was further improved during the SEAHELLARC project. Transmitting data in a miniSEED format permits to integrate the stations to the National Seismograph Network of Greece. Data collection over several months has proved the efficiency of the system and the technology used proved to be economic in establishing and maintaining the stations, and of low operational costs.

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