Similarity of Waveforms at Stations Moxa and Plauen for the 1985/86 Swarm

A peculiarity of the Vogtland/West Bohemia earthquake region is the appearance of earthquake swarms. The strongest swarms in this century occurred in 1908 and 1985/86. The swarm in 1985/86 is the first one, for which digital data (about 220 events, 400 waveforms, sampling rate 100 Hz) are available for stations Moxa (MOX) and Plauen (PLN). The waveforms of the swarms in the Vogtland show a high similarity. The similarity is quantified by cross-correlation applied to approximately 400 waveforms. The results are shown in the form of similarity matrices. Four types of events have been detected using the results of the cross-correlation between the S-waveforms recorded at station PLN. Type IV occurs predominantly at the end of the swarm. The waveforms of type IV are clearly different from the waveforms of the other types. The differences between the waveforms of the first three types are less pronounced. Especially the first three types occur alternately.     

Untersuchungen über das Vorkommen von Salmonellen in einer Oxydationsteichanlage

The examined oxydation pond treatment plant shows a good degradation (>95 %) of bacteriological pollution (colony count 20°, coliforms, enterococcae). In 55,6 % of raw waste water samples salmonella were detected but the effluent was free of salmonella. In total 10 sero-types were isolated and 91,1 % of all isolates were sensitive to all tested antibiotics.     

The East Thuringian Seismic Network

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.     

Untersuchungen zum Vorkommen von R+-Bakterien im Flußwasser

With colony numbers of 2 · 10⁴… 3 · 10⁵ and coliform contents of 2 · 10³… 1 · 1 · 10⁴ per ml, in the investigated river section 2.1% of colonies were resistant to tetracycline, 0.3% to chloramphenicol, 7.5% to kanamycin, 5.4% to trimethoprim, 12.7% to ampicillin and 0.14% to gentamycin. For the coliforms the resistances were 5.1% to tetracycline, 2.1% to chloramphenicol, 2.7% to kanamycin and 0.15% to gentamycin. There were isolated 63 different resistance types. Of the resistant Klebsiella strains 75% were resistant to three or more antibiotics. Of the coliform bacteria (Escherichia coli, Klebsiella, Enterobacter, Citrobacter) 31.6… 51.9% of the strains transferred their antibiotics-resistance to Escherichia coli K-12, for the antibiotics-resistant strains of Pseudomonas and Aeromonas a transfer of resistance was not observed at all.