Saxonian Seismological Online Network SXNET - overview

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Saxonian Seismological Online Network SXNET -
overview

• S. Funke, S. Wendt, M. Korn
• Institute of Geophysics and Geology, University
  of Leipzig, Germany Collm Observatory

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Topics

• Motivation
• Cooperation
• Technical details
• Part II
• SeisComP software in SXNET experiences and
  wishes

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Seismicity in Saxony

• Earthquakes in Germany and vicinity 800 2000
• (Leydecker, 2002)

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Networks in Saxony
SXNET online
SXNET offline
Neighbours
GRSN
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Cooperations networks of the neighbours

• TU BA Freiberg Offline SXNET
• Univ. Jena OTSN
• SZGRF Erlangen GRSN
• Univ. München Bavarian network
• GI-ASCR Praha WEBNET
• Univ. Brno KRASNET

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Technical data (SXNET online)

• 8 stations
• Seismometer 6 x Le3D-5s, 2 x STS-2
• 1 x Geophon 4.5 Hz
• Digitizer 24 Bit, 100 Hz, 1 x 200 Hz (Quanterra,
  EarthData)
• Continuous data acquisition
• Data transmission via SeedLink (ISDN)
• Calling interval 10 min

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Example station GUNZ
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WUET
Wüstenhain
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WERN
Wernitzgrün
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Part II SeisComP software in SXNET experiences
and wishes
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Data flow (I)

• Basics
• Hardware standard PCs
• OS SuSE Linux
• Data acquisition SeisComP
• Data transmission SeedLink

• Station site
• miniSEED files
• ring buffer 100 days, mirroring
• seedlink buffer 7 days
• one CD per two weeks

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Data flow (II)

• Data center (Leipzig)
• data calls via ISDN (dial up every 10 min)
• seedlink buffer 3 days
• further stations via internet
• NKC 20 Hz
• FBE 100 Hz
• ROTZ 200 Hz
• ca. one DVD per week

• Collm observatory via internet
• Data analysis
• SZGRF Erlangen via internet
• ...

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SeisComP SXNET (I)

• Continuous data, sampling rate 100 Hz, dial-up
  network (ISDN)
• Mirroring two versions
• SZGRF processdayfiles
• RAID1
• Automatic backup at the station site on CD/DVD
  (processdayfiles)
• Data delay of the data center max. 10 min

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SeisComP SXNET (II)

• Fifo after broken line
• Special case WERN
• reverse dial-up, analoguous phone line
• 6-channel EarthData, sampling rate 200 Hz
• handshaking between digitizer and data aquisition

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WERN
Wernitzgrün
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SeisComP small wishes

• (Version 2.5 not yet tested in Leipzig)
• Show active file like versions 1.x
• Easier configuration
• Private templates or
• private defaults
• Localization of menues (german)

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Thanks ...

• ... for the powerful software,
• ... for founding
• Sächsisches Landesamt für Umwelt und Geologie,
• ... to all neighboured networks for exchanging
  data,
• ... to you!