TOURNAI (BE)
Quarry blast13 May 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:01:032022-05-13
- UTC
- 11:01:032022-05-13
Main parameters
| Date and time | 2022-05-13 11:01:03 UTC 2022-05-13 13:01:03 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.648° N, 3.484° E Uncertainty ± 11.6 km |
| Event ID | ROB 16185 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-13 15:57:21 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
- 26.4 – 135.5km
- 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: 7 measurements, root-mean-square deviation 0.30 s. S wave: 5 measurements, root-mean-square deviation 0.62 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 | 26.4 | 74 | 11:01:09.15+5.16 s | 11:01:12.64+8.65 s | 3.49 |
| SKQSteenkerque | 42.2 | 90 | 11:01:11.13+7.14 s | 11:01:16.32+12.33 s | 5.19 |
| BRQBracquegnies | 49.8 | 112 | 11:01:12.38+8.39 s | – | – |
| SNFSeneffe | 58.7 | 105 | 11:01:13.68+9.69 s | 11:01:21.06+17.07 s | 7.38 |
| MRDMaredsous | 98.9 | 112 | 11:01:20.82+16.83 s | – | – |
| DOUDourbes | 100.1 | 127 | 11:01:21.29+17.30 s | 11:01:33.63+29.64 s | 12.34 |
| GESGesves | 117.4 | 104 | 11:01:23.68+19.69 s | 11:01:40.14+36.15 s | 16.46 |
| RCHRochefort | 135.5 | 113 | 11:01:27.73+23.74 s | 11:01:44.53+40.54 s | 16.80 |