TOURNAI (BE)
Quarry blast27 October 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:23:212022-10-27
- UTC
- 10:23:212022-10-27
Main parameters
| Date and time | 2022-10-27 10:23:21 UTC 2022-10-27 12:23:21 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.594° N, 3.482° E Uncertainty ± 10.0 km |
| Event ID | ROB 17565 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:30:07 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
- 11
- Epicentral distance
- 28.7 – 194.8km
- Mean velocity, P wave
- 5.7km/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 0.25 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)11 stations | |||||
| LESLessines | 28.7 | 63 | 10:23:26.35+4.61 s | 10:23:30.42+8.68 s | 4.07 |
| SKQSteenkerque | 42.7 | 81 | 10:23:28.98+7.24 s | 10:23:33.26+11.52 s | 4.28 |
| BRQBracquegnies | 48.0 | 105 | 10:23:30.06+8.32 s | – | – |
| RQRRonquières | 52.6 | 88 | 10:23:30.44+8.70 s | – | – |
| SNFSeneffe | 57.6 | 99 | 10:23:31.36+9.62 s | – | – |
| DOUDourbes | 96.7 | 125 | 10:23:38.83+17.09 s | – | – |
| MRDMaredsous | 96.9 | 109 | 10:23:38.61+16.87 s | – | – |
| GESGesves | 116.2 | 101 | 10:23:41.44+19.70 s | – | – |
| CLAClavier | 130.5 | 98 | 10:23:44.11+22.37 s | – | – |
| RCHRochefort | 133.4 | 111 | 10:23:44.48+22.74 s | – | – |
| KLBKalborn | 194.8 | 105 | 10:23:53.15+31.41 s | – | – |