TOURNAI (BE)
Quarry blast16 May 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:00:352022-05-16
- UTC
- 11:00:352022-05-16
Main parameters
| Date and time | 2022-05-16 11:00:35 UTC 2022-05-16 13:00:35 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.686° N, 3.421° E Uncertainty ± 6.7 km |
| Event ID | ROB 16190 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-18 22:29:09 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
- 29.9 – 201.9km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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 0.91 s. S wave: 5 measurements, root-mean-square deviation 0.54 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 | 29.9 | 84 | 11:00:41.67+6.14 s | 11:00:45.34+9.81 s | 3.67 |
| SKQSteenkerque | 46.8 | 95 | 11:00:43.53+8.00 s | 11:00:48.84+13.31 s | 5.31 |
| RQRRonquières | 57.6 | 99 | 11:00:43.83+8.30 s | – | – |
| SNFSeneffe | 64.1 | 107 | 11:00:46.03+10.50 s | 11:00:53.98+18.45 s | 7.95 |
| TGATangissart | 78.4 | 96 | 11:00:48.48+12.95 s | 11:00:58.78+23.25 s | 10.30 |
| MRDMaredsous | 104.7 | 114 | 11:00:54.87+19.34 s | – | – |
| DOUDourbes | 106.2 | 128 | 11:00:53.85+18.32 s | 11:01:06.86+31.33 s | 13.01 |
| GESGesves | 122.8 | 105 | 11:00:56.00+20.47 s | 11:01:13.10+37.57 s | 17.10 |
| KLBKalborn | 201.9 | 108 | 11:01:07.17+31.64 s | 11:01:31.67+56.14 s | 24.50 |