REBECQ (BE)
Quarry blast15 February 2022
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 11:15:562022-02-15
- UTC
- 10:15:562022-02-15
Main parameters
| Date and time | 2022-02-15 10:15:56 UTC 2022-02-15 11:15:56 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.665° N, 4.173° E Uncertainty ± 1.0 km |
| Event ID | ROB 15475 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-16 18:54:34 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
- 5
- Epicentral distance
- 6.8 – 25.5km
- 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: 5 measurements, root-mean-square deviation 0.13 s. S wave: 4 measurements, root-mean-square deviation 0.26 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)5 stations | |||||
| SKQSteenkerque | 6.8 | 255 | 10:15:58.02+1.42 s | 10:15:58.85+2.25 s | 0.83 |
| RQRRonquières | 7.5 | 151 | 10:15:58.24+1.64 s | – | – |
| SNFSeneffe | 18.8 | 155 | 10:16:00.37+3.77 s | 10:16:02.85+6.25 s | 2.48 |
| UCCBUccle | 19.7 | 42 | 10:16:00.55+3.95 s | 10:16:02.92+6.32 s | 2.37 |
| TGATangissart | 25.5 | 105 | 10:16:01.26+4.66 s | 10:16:04.14+7.54 s | 2.88 |