LEUZE-EN-HAINAUT (BE)
Quarry blast4 August 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:45:322022-08-04
- UTC
- 11:45:322022-08-04
Main parameters
| Date and time | 2022-08-04 11:45:32 UTC 2022-08-04 13:45:32 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.579° N, 3.581° E Uncertainty ± 4.7 km |
| Event ID | ROB 16750 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:32:47 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
- 23.6 – 187.7km
- Mean velocity, P wave
- 5.1km/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: 6 measurements, root-mean-square deviation 0.65 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 | |||||
| LESLessines | 23.6 | 52 | – | 11:45:39.81+7.24 s | – |
| SKQSteenkerque | 36.2 | 77 | 11:45:38.42+5.85 s | 11:45:43.69+11.12 s | 5.27 |
| BRQBracquegnies | 40.8 | 105 | 11:45:38.91+6.34 s | – | – |
| SNFSeneffe | 50.4 | 98 | 11:45:40.73+8.16 s | 11:45:48.13+15.56 s | 7.40 |
| OSTBOostende | 86.1 | 329 | 11:45:47.69+15.12 s | – | – |
| MRDMaredsous | 89.8 | 110 | 11:45:47.76+15.19 s | – | – |
| DOUDourbes | 90.1 | 126 | 11:45:49.95+17.38 s | – | – |
| KLBKalborn | 187.7 | 106 | 11:46:02.72+30.15 s | 11:46:25.80+53.23 s | 23.08 |