3 documents found in 70ms
# 1
Haberland, C. • Rietbrock, A. • Asch, G. • Chong, G.
Abstract: Local seismic network in Northern Chile, Southern Bolivia. (Grant-number: GIPP199604) Waveform data is available from the GEOFON data centre. License: “Creative Commons Attribution-ShareAlike 4.0 International License” (CC BY-SA).
# 2
San Fernando Royal Naval Observatory (ROA) • Universidad Complutense de Madrid (UCM) • Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum (GFZ) • Universidade de Evora (UEVORA, Portugal) • Institute Scientifique of RABAT (ISRABAT, Morocco)
Abstract: The Western Mediterranean Network (WM) is a regional seismological broad-band network deployed around the Ibero-Maghrebian area as a collaboration between two Spanish institutions, the San Fernando Royal Naval Observatory (ROA) and the Universidad Complutense de Madrid (UCM), being daily operated by ROA. The first WM station (SFUC) was installed by ROA and UCM in 1996 with the collaboration of the Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum (GFZ). WM code was assigned in 2005 by FDSN. The WM seismic network was created to provide high quality broad-band data for scientific use and contribute to national and international data centres for seismic monitoring. Since 1996 other partners came to WM net: GFZ, the Universidade de Evora (UEVORA, Portugal) and the Institute Scientifique of RABAT (ISRABAT, Morocco). The network has evolved towards real-time data acquisition and distribution between partners and other institutions while keeping the high quality broad-band data in focus, playing a leading role in the Ibero-Maghrebian seismic studies, providing valuable data for almost all fundamental and applied regional seismological research joint projects at ROA, UCM, the other WM partners, and other institutes. The standard stations are equipped with broad-band sensors (generally STS-2 or STS-2.5, although two of them have installed Guralp sensors) that allow resolution of the complete seismic spectrum from small high-frequency local earthquakes to the largest global earthquakes, high resolution digitizers (Quanterra or Earthdata), and SeisComP with seedlink software for real-time communications. Also, some stations are equipped with accelerometers (Episensor) and also a permanent geodetic GPS are co-installed at the same places.
# 3
Harjes, H.-P.
Abstract: Data acquisition from 1996-2002 was divided into five separate field deployments: one in 1996 and 1997 in western Crete, one in 1999 on the small island Gavdos, south of Crete, one in 2000/2001 in the Messara plain in central Crete and finally one in 2002 in the gap between the western and central Crete networks south of Rethimnon. For all deployments, short period seismometers (Mark-L4-3D, S13, GS13 or CM-3) and PDAS100 dataloggers were used. In 1996 a network of six mini-arrays was installed on westen Crete. Each mini-array consist of a central three-component seismometer (A01-A06) surrounded by three vertical component seismometers (A110,A120,A130,A210,..) within a radius of about 300 m. The average distance between the cental stations was about 10 km. These central stations were re-used in 1997 and the network was extended to 47 stations (A001-A047) equipped with tree-component seismometers deployed all over western Crete except the Levka Ori. Although the network aperture was significantly increased from about 20 km to 60 km the station spacing was reduced to 5 km. 12 stations (GA01-GC03) were installed on Gavdos in 1999 with a network aperture of only 5 km limited to the size of the island. The dense spacing allows array methods for the detection and localisation of seismicity. In 2000/2001 an 8 station network (M001-M008) was located around the Messara plain in central Crete. The maximum aperture of this network was 50 km in EW and 20 km in NS direction. To close the gap in the seismicity observation between western and central Crete 7 stations (R01-R07) were installed south of Rethimnon in 2002. The seismic networks were originally planned as part of pre-site surveys for specific drilling proposals within the International Continental Drilling Program (ICDP). The networks provide the opportunity to image shallow seismically active zones of the Hellenic subduction zone. Waveform data is available from the GEOFON data centre, under network code YU, and is fully open.
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