TOURNAI (BE)
Quarry blast5 August 2022
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:03:012022-08-05
- UTC
- 10:03:012022-08-05
Main parameters
| Date and time | 2022-08-05 10:03:01 UTC 2022-08-05 12:03:01 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.638° N, 3.470° E Uncertainty ± 7.0 km |
| Event ID | ROB 16760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:33:18 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
- 27.6 – 197.1km
- Mean velocity, P wave
- 5.5km/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 0.62 s. S wave: 4 measurements, root-mean-square deviation 0.44 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 | 27.6 | 73 | 10:03:06.62+5.20 s | 10:03:10.27+8.85 s | 3.65 |
| SKQSteenkerque | 43.2 | 88 | 10:03:08.51+7.09 s | 10:03:14.36+12.94 s | 5.85 |
| RQRRonquières | 53.6 | 93 | 10:03:10.69+9.27 s | – | – |
| SNFSeneffe | 59.4 | 103 | 10:03:11.27+9.85 s | 10:03:18.62+17.20 s | 7.35 |
| MRDMaredsous | 99.5 | 112 | 10:03:20.39+18.97 s | – | – |
| GESGesves | 118.1 | 103 | 10:03:22.49+21.07 s | 10:03:36.60+35.18 s | 14.11 |
| CLAClavier | 132.2 | 100 | 10:03:24.05+22.63 s | 10:03:40.88+39.46 s | 16.83 |
| MRGMont Rigi | 185.1 | 93 | 10:03:23.37+21.95 s | – | – |
| KLBKalborn | 197.1 | 107 | 10:03:32.83+31.41 s | – | – |