TOURNAI (BE)
Quarry blast3 November 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:15:152022-11-03
- UTC
- 12:15:152022-11-03
Main parameters
| Date and time | 2022-11-03 12:15:15 UTC 2022-11-03 13:15:15 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.648° N, 3.474° E Uncertainty ± 15.7 km |
| Event ID | ROB 17610 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:37:15 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
- 27.0 – 132.1km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.45 s. S wave: 4 measurements, root-mean-square deviation 0.55 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 | 27.0 | 75 | 12:15:20.76+5.73 s | 12:15:23.64+8.61 s | 2.88 |
| SKQSteenkerque | 42.9 | 90 | 12:15:22.18+7.15 s | 12:15:27.28+12.25 s | 5.10 |
| RQRRonquières | 53.4 | 95 | 12:15:23.77+8.74 s | – | – |
| SNFSeneffe | 59.4 | 105 | 12:15:24.65+9.62 s | – | – |
| MRDMaredsous | 99.6 | 112 | 12:15:31.46+16.43 s | – | – |
| DOUDourbes | 100.7 | 127 | 12:15:31.90+16.87 s | 12:15:45.87+30.84 s | 13.97 |
| GESGesves | 118.1 | 104 | 12:15:34.72+19.69 s | 12:15:51.63+36.60 s | 16.91 |
| MOLSMol | 129.6 | 60 | 12:15:38.05+23.02 s | – | – |
| CLAClavier | 132.1 | 100 | 12:15:36.88+21.85 s | – | – |