TOURNAI (BE)
Quarry blast24 November 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:30:212022-11-24
- UTC
- 11:30:212022-11-24
Main parameters
| Date and time | 2022-11-24 11:30:21 UTC 2022-11-24 12:30:21 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.620° N, 3.466° E Uncertainty ± 9.2 km |
| Event ID | ROB 17855 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-28 08:31:12 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
- 28.5 – 135.5km
- Mean velocity, P wave
- 6.2km/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 0.43 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 | 28.5 | 69 | 11:30:27.23+5.54 s | 11:30:30.31+8.62 s | 3.08 |
| SKQSteenkerque | 43.6 | 86 | 11:30:29.23+7.54 s | 11:30:34.79+13.10 s | 5.56 |
| RQRRonquières | 53.7 | 91 | 11:30:31.63+9.94 s | – | – |
| SNFSeneffe | 59.2 | 102 | 11:30:31.28+9.59 s | 11:30:39.05+17.36 s | 7.77 |
| TGATangissart | 74.8 | 91 | 11:30:33.99+12.30 s | – | – |
| GESGesves | 117.9 | 102 | 11:30:41.68+19.99 s | – | – |
| CLAClavier | 132.1 | 99 | 11:30:44.33+22.64 s | – | – |
| RCHRochefort | 135.5 | 112 | 11:30:45.22+23.53 s | – | – |