REBECQ (BE)
Quarry blast4 August 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 10:27:182022-08-04
- UTC
- 08:27:182022-08-04
Main parameters
| Date and time | 2022-08-04 08:27:18 UTC 2022-08-04 10:27:18 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.659° N, 4.168° E Uncertainty ± 1.0 km |
| Event ID | ROB 16745 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:32:34 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
- 6.3 – 69.7km
- Mean velocity, P wave
- 5.4km/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 0.12 s. S wave: 4 measurements, root-mean-square deviation 0.25 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 | 6.3 | 260 | 08:27:19.97+1.22 s | 08:27:20.80+2.05 s | 0.83 |
| RQRRonquières | 7.1 | 145 | 08:27:20.28+1.53 s | – | – |
| SNFSeneffe | 18.4 | 153 | 08:27:22.39+3.64 s | 08:27:24.84+6.09 s | 2.45 |
| UCCBUccle | 20.5 | 41 | 08:27:22.75+4.00 s | 08:27:25.25+6.50 s | 2.50 |
| TGATangissart | 25.7 | 103 | 08:27:23.43+4.68 s | 08:27:26.40+7.65 s | 2.97 |
| DOUDourbes | 69.7 | 154 | 08:27:31.85+13.10 s | – | – |