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Latest Data

Network status

Currently we are recording in triggered mode with a 1 kHz sampling rate on 24 channels. The data are transferred in form of 16 second data files in near-real time to NORSAR, and forwarded to a basic automatically processing. In order to get a rough overview on the status of the network we compute the signal amplitudes averaged over a 16-second time window. This allows us to see immediately the noise conditions within the network. Signals large enough to be seen on all geophones show up as vertical lines and may be indicative for a seismic event or man-made noise within the network. Once we have received the data for a full day we run a more sophisticated event detection procedure. Currently, we assign an event, if we observe a seismic signal with a signal-to-noise ratio better than 2.5 on at least 4 geophones within a common time window of 0.5 seconds.

Overview on current seismicity

The figure shows the latest plot of the seismic signal level in the network. Signal amplitudes averaged over a 16-second time window. The figure shows the amplitude level of the 24 channels of the 8 geophones as a function of time (GMT). The local time is GMT + 1 hour, or GMT + 2 hours during the daylight saving period in summer. High amplitudes are in red, low amplitudes are in blue. Vertical lines represent signals that are observed at all instruments and may be indicative for a larger seismic event or man-made noise.

For older plots, click here.
 

The figure shows daily seismic activity. The height of the columns indicate the number of seismic events within a certain hour of the day. The times are given in Greenwich Mean Time. The colors indicate on how many channels a particular event was recorded. Black, blue, green, magenta and red means the events was observed on more than 9, 12, 15, 18 and 21 channels, respectively.

For older plots, click here .
The table shows basic parameters of the latest automatically detected events:
  • Date and time in GMT
  • nGeo: Number of geophones with a detection Geoph: geophones with (1) and without (0) detection, e.q 10110011 means geophone 1,3,4,7,8 detected
  • Amplitude: Average signal amplitude
  • Data file: Link to waveform plot.
 

This figure shows all seismic events within the last 30 days as a function of the hour of the day. The color-coding is as described for the daily seismic activity plot above.

For a monthly overview, click here.

The last figure shows seismic activity during the last 30 days. The color-coding is as described for the daily seismic activity plot above.

For a monthly overview, click here .
 

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