TOURNAI (BE)
Quarry blast24 May 2023
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:30:262023-05-24
- UTC
- 10:30:262023-05-24
Main parameters
| Date and time | 2023-05-24 10:30:26 UTC 2023-05-24 12:30:26 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.637° N, 3.456° E Uncertainty ± 16.3 km |
| Event ID | ROB 19505 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-05-30 10:42:36 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 – 119.0km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.49 s. S wave: 6 measurements, root-mean-square deviation 0.72 s.
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 | 73 | 10:30:32.18+5.43 s | 10:30:36.13+9.38 s | 3.95 |
| SKQSteenkerque | 44.1 | 88 | 10:30:34.33+7.58 s | 10:30:40.40+13.65 s | 6.07 |
| BRQBracquegnies | 51.2 | 110 | 10:30:35.39+8.64 s | – | – |
| RQRRonquières | 54.5 | 93 | 10:30:36.48+9.73 s | 10:30:42.31+15.56 s | 5.83 |
| SNFSeneffe | 60.3 | 103 | 10:30:36.54+9.79 s | 10:30:44.49+17.74 s | 7.95 |
| TGATangissart | 75.5 | 92 | 10:30:39.63+12.88 s | – | – |
| DOUDourbes | 101.0 | 126 | 10:30:44.99+18.24 s | 10:30:56.65+29.90 s | 11.66 |
| GESGesves | 119.0 | 103 | 10:30:46.58+19.83 s | 10:31:03.69+36.94 s | 17.11 |