TOURNAI (BE)
Quarry blast6 May 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:49:232022-05-06
- UTC
- 10:49:232022-05-06
Main parameters
| Date and time | 2022-05-06 10:49:23 UTC 2022-05-06 12:49:23 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.638° N, 3.477° E Uncertainty ± 10.7 km |
| Event ID | ROB 16115 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-08 13:57:51 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
- 5
- Epicentral distance
- 27.1 – 99.9km
- Mean velocity, P wave
- 6.0km/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: 5 measurements, root-mean-square deviation 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.37 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)5 stations | |||||
| LESLessines | 27.1 | 72 | 10:49:28.52+4.85 s | – | – |
| SKQSteenkerque | 42.7 | 88 | 10:49:31.19+7.52 s | 10:49:36.84+13.17 s | 5.65 |
| SNFSeneffe | 58.9 | 104 | 10:49:33.58+9.91 s | 10:49:41.22+17.55 s | 7.64 |
| MRDMaredsous | 99.0 | 112 | 10:49:40.90+17.23 s | 10:49:52.25+28.58 s | 11.35 |
| DOUDourbes | 99.9 | 127 | 10:49:40.80+17.13 s | 10:49:53.37+29.70 s | 12.57 |