BRAINE-LE-COMTE (BE)
Quarry blast11 February 2022
- Magnitude
- 0.7ML
- Depth
- –
- Belgian time
- 14:08:122022-02-11
- UTC
- 13:08:122022-02-11
Main parameters
| Date and time | 2022-02-11 13:08:12 UTC 2022-02-11 14:08:12 Belgian time |
|---|---|
| Magnitude | ML 0.7 |
| Epicentral coordinates | 50.586° N, 4.135° E Uncertainty ± 3.5 km |
| Event ID | ROB 15460 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-14 09:37:08 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 – 27.5km
- Mean velocity, P wave
- 6.0km/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 0.57 s. S wave: 4 measurements, root-mean-square deviation 0.87 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 | |||||
| RQRRonquières | 6.8 | 71 | 13:08:13.50+1.41 s | – | – |
| SKQSteenkerque | 8.0 | 331 | 13:08:13.57+1.48 s | 13:08:14.84+2.75 s | 1.27 |
| BDHNBois d'Haine | 10.0 | 145 | 13:08:13.23+1.14 s | 13:08:16.04+3.95 s | 2.81 |
| SNFSeneffe | 13.5 | 128 | 13:08:15.26+3.17 s | 13:08:18.01+5.92 s | 2.75 |
| TGATangissart | 27.5 | 85 | 13:08:17.59+5.50 s | 13:08:19.88+7.79 s | 2.29 |