SOIGNIES (BE)
Quarry blast4 November 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:47:342022-11-04
- UTC
- 12:47:342022-11-04
Main parameters
| Date and time | 2022-11-04 12:47:34 UTC 2022-11-04 13:47:34 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.574° N, 4.095° E Uncertainty ± 0.5 km |
| Event ID | ROB 17640 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:38:19 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
- 10
- Epicentral distance
- 8.4 – 131.6km
- Mean velocity, P wave
- 5.8km/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 0.12 s. S wave: 4 measurements, root-mean-square deviation 0.24 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)8 stations | |||||
| SKQSteenkerque | 8.4 | 353 | 12:47:36.52+1.77 s | 12:47:37.51+2.76 s | 0.99 |
| RQRRonquières | 9.9 | 69 | 12:47:36.76+2.01 s | – | – |
| BRQBracquegnies | 10.8 | 164 | 12:47:36.81+2.06 s | – | – |
| BDHNBois d'Haine | 11.0 | 129 | 12:47:37.08+2.33 s | – | – |
| SNFSeneffe | 15.2 | 118 | 12:47:37.53+2.78 s | 12:47:39.98+5.23 s | 2.45 |
| LESLessines | 23.4 | 311 | 12:47:39.19+4.44 s | 12:47:42.14+7.39 s | 2.95 |
| TGATangissart | 30.5 | 83 | 12:47:40.05+5.30 s | 12:47:43.89+9.14 s | 3.84 |
| GESGesves | 73.5 | 106 | 12:47:47.74+12.99 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 129.7 | 80 | 12:47:57.24+22.49 s | – | – |
| HGNHeimansgroeve | 131.6 | 80 | 12:47:57.69+22.94 s | – | – |