QUENAST (BE)

Known mine explosion14 March 2012

Magnitude: 1.6M_L
Depth: –
Belgian time: 15:11:002012-03-14
UTC: 14:11:002012-03-14

Main parameters

Date and time	2012-03-14 14:11:00 UTC 2012-03-14 15:11:00 Belgian time
Magnitude	M_L 1.6
Epicentral coordinates	50.697° N, 4.170° E Uncertainty ± 4.2 km
Event ID	ROB 4683

Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-03-14 15:58:17 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: 7
Epicentral distance: 8.3 – 96.3km
Mean velocity, P wave: 5.7km/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 0.21 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)7 stations
SKQSteenkerque	8.3	230	14:11:02.03+1.26 s	14:11:02.72+1.95 s	0.69
RQRRonquières	10.8	159	14:11:02.36+1.59 s	–	–
BOUBougnies	37.8	205	14:11:07.61+6.84 s	14:11:11.43+10.66 s	3.82
MRDMaredsous	61.0	136	14:11:11.41+10.64 s	–	–
DOUDourbes	73.4	156	14:11:13.69+12.92 s	–	–
GESGesves	73.6	118	14:11:13.67+12.90 s	–	–
RCHRochefort	96.3	128	14:11:17.17+16.40 s	–	–

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QUENAST (BE)

Main parameters

Location map

Arrival times at the stations

Station measurements