SOIGNIES (BE)
Quarry blast12 January 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:06:272022-01-12
- UTC
- 13:06:272022-01-12
Main parameters
| Date and time | 2022-01-12 13:06:27 UTC 2022-01-12 14:06:27 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.589° N, 4.085° E Uncertainty ± 1.6 km |
| Event ID | ROB 15150 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-12 17:21:51 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
- 6.7 – 132.0km
- 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: 6 measurements, root-mean-square deviation 0.22 s. S wave: 4 measurements, root-mean-square deviation 0.35 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 | 6.7 | 357 | 13:06:28.71+1.32 s | 13:06:29.73+2.34 s | 1.02 |
| RQRRonquières | 10.1 | 79 | 13:06:29.38+1.99 s | – | – |
| BRQBracquegnies | 12.5 | 163 | 13:06:29.28+1.89 s | – | – |
| SNFSeneffe | 16.6 | 122 | 13:06:30.25+2.86 s | 13:06:33.13+5.74 s | 2.88 |
| TGATangissart | 31.0 | 87 | 13:06:32.67+5.28 s | 13:06:36.55+9.16 s | 3.88 |
| DOUDourbes | 65.9 | 146 | 13:06:39.04+11.65 s | 13:06:47.13+19.74 s | 8.09 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 132.0 | 81 | 13:06:50.07+22.68 s | 13:07:06.83+39.44 s | 16.76 |