REBECQ (BE)
Quarry blast23 August 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:07:192022-08-23
- UTC
- 10:07:192022-08-23
Main parameters
| Date and time | 2022-08-23 10:07:19 UTC 2022-08-23 12:07:19 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.666° N, 4.172° E Uncertainty ± 1.2 km |
| Event ID | ROB 16925 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-26 15:01:01 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
- 8
- Epicentral distance
- 6.8 – 70.3km
- Mean velocity, P wave
- 5.7km/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: 8 measurements, root-mean-square deviation 0.32 s. S wave: 4 measurements, root-mean-square deviation 0.39 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)8 stations | |||||
| SKQSteenkerque | 6.8 | 254 | 10:07:20.62+1.39 s | 10:07:21.41+2.18 s | 0.79 |
| RQRRonquières | 7.6 | 151 | 10:07:20.84+1.61 s | – | – |
| BDHNBois d'Haine | 17.4 | 170 | 10:07:22.93+3.70 s | – | – |
| SNFSeneffe | 19.0 | 155 | 10:07:22.97+3.74 s | 10:07:25.70+6.47 s | 2.73 |
| UCCBUccle | 19.7 | 42 | 10:07:23.19+3.96 s | 10:07:25.56+6.33 s | 2.37 |
| TGATangissart | 25.7 | 105 | 10:07:23.86+4.63 s | 10:07:26.61+7.38 s | 2.75 |
| MRDMaredsous | 58.5 | 134 | 10:07:29.28+10.05 s | – | – |
| DOUDourbes | 70.3 | 155 | 10:07:32.48+13.25 s | – | – |