ANDENNE (BE)

Quarry blast4 January 2017

Magnitude
1.6ML
Depth
–
Belgian time
14:27:272017-01-04
UTC
13:27:272017-01-04

Main parameters

Date and time2017-01-04 13:27:27 UTC
2017-01-04 14:27:27 Belgian time
MagnitudeML 1.6
Epicentral coordinates50.505° N, 4.973° E
Uncertainty ± 5.5 km
Event IDROB 5610

Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-01-05 09:15:31 Belgian time

Location map

  • Epicentre
  • Station that recorded the event

Arrival times at the stations

Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.

Stations
7
Epicentral distance
15.6 – 74.4km
Mean velocity, P wave
5.9km/s
  • P wave
  • S wave
  • Curve fitted to the measurements
Notes and method

Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 7 measurements, root-mean-square deviation 0.26 s.

Table of measurements

Station measurements

P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.

km°UTCUTCs
Belgian seismic network (Royal Observatory of Belgium)7 stations
GESGesves15.614913:27:30.18+2.93 s––
CLAClavier25.211213:27:32.25+5.00 s13:27:35.74+8.49 s3.49
MRDMaredsous26.921313:27:32.83+5.58 s13:27:36.41+9.16 s3.58
STISart Tilman42.77813:27:35.18+7.93 s––
RCHRochefort43.015513:27:35.14+7.89 s––
SKQSteenkerque65.328513:27:38.57+11.32 s––
MEMHMembach74.48113:27:40.69+13.44 s––
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