THE FIRST AUTOMATIC DIGITAL SLOVENIAN NATIONAL SEISMIC NETWORK

Abstract

The structure of the first seismic network in Slovenia was based on the experience and technical possibilities of that time period. The framework of the network, that is the equipment for the seismic stations and the Data Processing Centre (DPC), was provided by the Canadian company Nanometrics in 1995. Individual locations were equipped in 1995, 1996 and 1997. The year 1996 is the starting point of the operation of the digital seismic network, when four seismic stations were connected to the network. By the end of 1997, one seismic station was connected to the same local area network (LAN) as the DPC, four communicated with the DPC via conventional telephone lines (dial-up access) and one has access to the DPC via “leased line”. All the stations sent event-triggered data to the DPC when the earthquake activity was over. The connections over conventional telephone lines and the small dynamic range of the RD-3 digitisers were main drawbacks of the network, which was established in the Posočje earthquake in 1998 and thus indicated guidelines for future improvements.