REBECQ (BE)
Quarry blast14 December 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 11:44:422021-12-14
- UTC
- 10:44:422021-12-14
Main parameters
| Date and time | 2021-12-14 10:44:42 UTC 2021-12-14 11:44:42 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.677° N, 4.154° E Uncertainty ± 0.6 km |
| Event ID | ROB 15000 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-15 10:38:32 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
- 6.1 – 86.2km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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 0.16 s. S wave: 5 measurements, root-mean-square deviation 0.12 s.
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 | 6.1 | 240 | 10:44:43.42+1.28 s | 10:44:44.22+2.08 s | 0.80 |
| RQRRonquières | 9.3 | 148 | 10:44:43.77+1.63 s | – | – |
| UCCBUccle | 19.7 | 47 | 10:44:45.85+3.71 s | – | – |
| TGATangissart | 27.2 | 107 | 10:44:46.75+4.61 s | 10:44:50.41+8.27 s | 3.66 |
| DOUDourbes | 71.9 | 154 | 10:44:54.62+12.48 s | 10:45:03.82+21.68 s | 9.20 |
| GESGesves | 73.7 | 116 | 10:44:55.21+13.07 s | 10:45:04.00+21.86 s | 8.79 |
| CLAClavier | 86.2 | 109 | 10:44:56.98+14.84 s | 10:45:08.01+25.87 s | 11.03 |