ANDENNE (BE)

Quarry blast9 January 2019

Magnitude: 1.7M_L
Depth: –
Belgian time: 14:20:152019-01-09
UTC: 13:20:152019-01-09

Main parameters

Date and time	2019-01-09 13:20:15 UTC 2019-01-09 14:20:15 Belgian time
Magnitude	M_L 1.7
Epicentral coordinates	50.499° N, 4.985° E Uncertainty ± 2.6 km
Event ID	ROB 7600

Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-09 15:38:09 Belgian time

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: 6
Epicentral distance: 24.2 – 73.1km
Mean velocity, P wave: 6.0km/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: 6 measurements, root-mean-square deviation 0.55 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	°	UTC	UTC	s
Belgian seismic network (Royal Observatory of Belgium)5 stations
CLAClavier	24.2	112	13:20:19.91+4.26 s	13:20:23.20+7.55 s	3.29
MRDMaredsous	26.8	215	13:20:20.19+4.54 s	13:20:24.21+8.56 s	4.02
RCHRochefort	42.0	156	13:20:23.70+8.05 s	13:20:28.79+13.14 s	5.09
UCCBUccle	55.3	307	13:20:26.03+10.38 s	–	–
SKQSteenkerque	66.3	285	13:20:26.27+10.62 s	–	–
Dutch seismic network (KNMI)1 station
HGNHeimansgroeve	73.1	66	13:20:28.28+12.63 s	–	–

Did you feel an earthquake?The inquiry takes just a few minutes. Every report helps seismologists assess the effects of the earthquake.

Take the inquiry

ANDENNE (BE)

Main parameters

Location map

Arrival times at the stations

Station measurements