LEUZE-EN-HAINAUT (BE)
Quarry blast2 December 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:48:022021-12-02
- UTC
- 11:48:022021-12-02
Main parameters
| Date and time | 2021-12-02 11:48:02 UTC 2021-12-02 12:48:02 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.607° N, 3.565° E Uncertainty ± 7.3 km |
| Event ID | ROB 14925 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-06 13:52:13 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
- 9
- Epicentral distance
- 22.8 – 189.6km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.31 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)9 stations | |||||
| LESLessines | 22.8 | 59 | 11:48:06.28+4.22 s | – | – |
| SKQSteenkerque | 36.7 | 83 | 11:48:08.13+6.07 s | 11:48:14.86+12.80 s | 6.73 |
| BRQBracquegnies | 42.8 | 109 | 11:48:09.33+7.27 s | – | – |
| RQRRonquières | 46.7 | 90 | 11:48:10.74+8.68 s | – | – |
| SNFSeneffe | 52.0 | 102 | 11:48:10.62+8.56 s | 11:48:14.95+12.89 s | 4.33 |
| MRDMaredsous | 91.9 | 111 | 11:48:17.48+15.42 s | – | – |
| DOUDourbes | 92.8 | 127 | 11:48:17.81+15.75 s | 11:48:30.14+28.08 s | 12.33 |
| RCHRochefort | 128.4 | 112 | 11:48:24.37+22.31 s | – | – |
| KLBKalborn | 189.6 | 106 | 11:48:32.57+30.51 s | – | – |