BRAINE-LE-COMTE (BE)
Quarry blast14 October 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:04:122022-10-14
- UTC
- 12:04:122022-10-14
Main parameters
| Date and time | 2022-10-14 12:04:12 UTC 2022-10-14 14:04:12 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.594° N, 4.089° E Uncertainty ± 1.7 km |
| Event ID | ROB 17375 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-15 15:21:56 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
- 8
- Epicentral distance
- 6.1 – 141.0km
- Mean velocity, P wave
- 5.8km/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: 6 measurements, root-mean-square deviation 0.37 s. S wave: 4 measurements, root-mean-square deviation 0.54 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)7 stations | |||||
| SKQSteenkerque | 6.1 | 354 | 12:04:13.58+1.24 s | 12:04:14.46+2.12 s | 0.88 |
| RQRRonquières | 9.7 | 82 | 12:04:14.30+1.96 s | – | – |
| BRQBracquegnies | 13.0 | 165 | 12:04:14.07+1.73 s | – | – |
| SNFSeneffe | 16.6 | 124 | 12:04:15.31+2.97 s | 12:04:18.36+6.02 s | 3.05 |
| TGATangissart | 30.7 | 88 | 12:04:17.67+5.33 s | 12:04:22.33+9.99 s | 4.66 |
| DOUDourbes | 66.2 | 147 | 12:04:24.36+12.02 s | 12:04:31.90+19.56 s | 7.54 |
| MRGMont Rigi | 141.0 | 93 | 12:04:36.23+23.89 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 131.6 | 81 | 12:04:34.63+22.29 s | – | – |