TOURNAI (BE)
Quarry blast11 May 2022
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:31:052022-05-11
- UTC
- 10:31:052022-05-11
Main parameters
| Date and time | 2022-05-11 10:31:05 UTC 2022-05-11 12:31:05 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.666° N, 3.431° E Uncertainty ± 3.8 km |
| Event ID | ROB 16145 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-13 15:37:38 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
- 7
- Epicentral distance
- 45.9 – 200.6km
- Mean velocity, P wave
- 6.0km/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: 4 measurements, root-mean-square deviation 0.18 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 | 45.9 | 92 | 10:31:13.03+7.95 s | 10:31:18.83+13.75 s | 5.80 |
| BRQBracquegnies | 54.0 | 112 | 10:31:13.89+8.81 s | – | – |
| MRDMaredsous | 103.2 | 113 | 10:31:22.42+17.34 s | – | – |
| DOUDourbes | 104.4 | 127 | 10:31:22.64+17.56 s | 10:31:36.01+30.93 s | 13.37 |
| GESGesves | 121.5 | 104 | 10:31:25.69+20.61 s | 10:31:41.31+36.23 s | 15.62 |
| RCHRochefort | 139.8 | 113 | 10:31:29.44+24.36 s | 10:31:45.74+40.66 s | 16.30 |
| KLBKalborn | 200.6 | 107 | 10:31:37.46+32.38 s | 10:32:00.95+55.87 s | 23.49 |