TOURNAI (BE)
Quarry blast10 November 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:00:212022-11-10
- UTC
- 12:00:212022-11-10
Main parameters
| Date and time | 2022-11-10 12:00:21 UTC 2022-11-10 13:00:21 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.612° N, 3.496° E Uncertainty ± 3.3 km |
| Event ID | ROB 17695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:41:44 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
- 6
- Epicentral distance
- 26.9 – 194.5km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.5km/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: 5 measurements, root-mean-square deviation 0.32 s. S wave: 5 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)6 stations | |||||
| LESLessines | 26.9 | 66 | 12:00:26.86+5.03 s | 12:00:30.54+8.71 s | 3.68 |
| SKQSteenkerque | 41.5 | 84 | 12:00:28.94+7.11 s | 12:00:34.99+13.16 s | 6.05 |
| TGATangissart | 72.6 | 90 | 12:00:33.72+11.89 s | 12:00:43.08+21.25 s | 9.36 |
| DOUDourbes | 97.1 | 126 | 12:00:38.57+16.74 s | 12:00:50.73+28.90 s | 12.16 |
| GESGesves | 115.7 | 102 | 12:00:41.40+19.57 s | 12:00:55.96+34.13 s | 14.56 |
| KLBKalborn | 194.5 | 106 | 12:00:53.25+31.42 s | – | – |