The East Thuringian Seismic Network

• Published in: Studia geophysica et geodaetica Vol. 44; no. 4; pp. 594 - 601
• Main Authors: Kracke, D, Heinrich, R, Hemmann, A, Jentzsch, G, Ziegert, A
• Format: Journal Article
• Language: English
• Published: Prague Springer Nature B.V 01-01-2000
• Subjects: Analysis; Communication; Computers; Data acquisition; Data acquisition systems; Disk drives; Disks; Earthquakes; Geological hazards; Global positioning systems; GPS; Hard disks; Modems; Seismic activity; Seismic analysis; Seismic hazard; Seismicity; Seismometers; Signal processing; Stress distribution; Tectonics; Waveforms
• ISSN: 0039-3169; 1573-1626
• DOI: 10.1023/A:1021875920316

The East Thuringian Seismic Network (OTSN) was installed in 1997. It started its operation with five and now consists of six seismic stations, the GRSN (German Regional Seismic Network) station MOX and a control and analysis centre. All stations are equipped with 3-component GÜRALP and short-period seismometers, RefTek 24-bit data acquisition systems (dynamic range 23.5 bit), hard disks, GPS-receivers, modems and communication computers for dial-up purposes. The seismic signals are sampled at 100 Hz and stored on the hard disk. Simultaneously, the signals are processed by a STA/LTA detector which generates an extended event list. The central station calls these event lists once per day, analyses them, produces a list of ‘real’ seismic events and calls the waveform data for these events only from the single stations. All stations operate completely autonomously and the whole system works automatically, but all operations can also be carried out interactively. The event analysis is performed manually using common seismic analysis programs.The main purpose of installing the seismic network is to investigate the local seismicity, its relation to recent tectonics, the stress field and structure of the upper crust in order to render more precisely the seismic hazard of East Thuringia. A further aim of the network is to improve the seismic monitoring situation for the neighbouring regions, especially the Vogtland/Northern Bohemia and the Western Saxony area.