SOIGNIES (BE)
Quarry blast1 December 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:15:012022-12-01
- UTC
- 13:15:012022-12-01
Main parameters
| Date and time | 2022-12-01 13:15:01 UTC 2022-12-01 14:15:01 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.588° N, 4.082° E Uncertainty ± 2.0 km |
| Event ID | ROB 17935 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-02 10:01:18 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
- 6.8 – 141.5km
- Mean velocity, P wave
- 6.5km/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: 5 measurements, root-mean-square deviation 0.14 s. S wave: 4 measurements, root-mean-square deviation 0.25 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | 6.8 | 359 | 13:15:02.68+1.20 s | 13:15:04.08+2.60 s | 1.40 |
| RQRRonquières | 10.4 | 79 | 13:15:03.40+1.92 s | – | – |
| SNFSeneffe | 16.7 | 121 | 13:15:04.42+2.94 s | 13:15:07.40+5.92 s | 2.98 |
| UCCBUccle | 30.5 | 40 | 13:15:06.67+5.19 s | 13:15:10.96+9.48 s | 4.29 |
| TGATangissart | 31.2 | 86 | 13:15:06.76+5.28 s | 13:15:11.23+9.75 s | 4.47 |
| MRGMont Rigi | 141.5 | 93 | 13:15:25.83+24.35 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 132.2 | 81 | 13:15:24.67+23.19 s | 13:15:40.33+38.85 s | 15.66 |