REBECQ (BE)
Quarry blast17 January 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:08:522022-01-17
- UTC
- 12:08:522022-01-17
Main parameters
| Date and time | 2022-01-17 12:08:52 UTC 2022-01-17 13:08:52 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.697° N, 4.111° E Uncertainty ± 2.9 km |
| Event ID | ROB 15190 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-18 11:37:26 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
- 6
- Epicentral distance
- 5.8 – 77.4km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.3km/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 0.31 s. S wave: 4 measurements, root-mean-square deviation 0.18 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)6 stations | |||||
| SKQSteenkerque | 5.8 | 202 | 12:08:53.37+1.27 s | 12:08:53.96+1.86 s | 0.59 |
| RQRRonquières | 13.0 | 142 | 12:08:54.72+2.62 s | – | – |
| UCCBUccle | 20.8 | 58 | 12:08:55.26+3.16 s | 12:08:58.93+6.83 s | 3.67 |
| SNFSeneffe | 24.1 | 149 | 12:08:56.83+4.73 s | 12:08:59.77+7.67 s | 2.94 |
| TGATangissart | 30.8 | 109 | 12:08:57.68+5.58 s | 12:09:01.54+9.44 s | 3.86 |
| GESGesves | 77.4 | 116 | 12:09:05.61+13.51 s | – | – |