Broad band seismic sensors and their application: case study-Livingston Island, Antarctica

The aim of the paper is to present sensors for measuring the ground motion and a specific application related to recording seismic events on Livingston Island. The theory of operation of seismic sensors (seismometers) is described briefly. The basic parameters, classification and dynamic behavior of a seismograph system are discussed. It is considered the force-balance principle for constructing now a days seismometers. Some of the requirements for site selection and installation of seismometer are also commented on. Bulgarian broadband seismological station (with international abbreviation LIVV) is established on 19.12.2015near the Bulgarian Antarctic Base “St. Kliment Ohridski” on Livingston Island as a seasonal station. The deployment period of the station comprises three Antarctic campaigns in the period 2015-2018. More than 12000 tectonic an ice generated events were recorded. The seismological equipment operates in harsh weather conditions with low temperatures, strong wind gusts and high humidity. In order to ensure optimal operation of the seismic station, special precautions are taken during the installation of the apparatus. The paper presents the assessment of the performance of the seismological equipment, power supply, data transfer solutions and technical problems met during the operational