TOURNAI (BE)
Quarry blast5 May 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:30:052022-05-05
- UTC
- 10:30:052022-05-05
Main parameters
| Date and time | 2022-05-05 10:30:05 UTC 2022-05-05 12:30:05 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.649° N, 3.506° E Uncertainty ± 5.0 km |
| Event ID | ROB 16090 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-08 13:56:03 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
- 6
- Epicentral distance
- 40.6 – 195.0km
- Mean velocity, P wave
- 5.9km/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: 4 measurements, root-mean-square deviation 0.22 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)6 stations | |||||
| SKQSteenkerque | 40.6 | 90 | 10:30:13.33+7.37 s | – | – |
| BRQBracquegnies | 48.4 | 112 | 10:30:14.18+8.22 s | – | – |
| SNFSeneffe | 57.2 | 105 | 10:30:15.62+9.66 s | 10:30:23.07+17.11 s | 7.45 |
| DOUDourbes | 99.0 | 128 | 10:30:23.06+17.10 s | – | – |
| CLAClavier | 129.9 | 101 | 10:30:27.98+22.02 s | 10:30:44.49+38.53 s | 16.51 |
| KLBKalborn | 195.0 | 107 | 10:30:37.65+31.69 s | – | – |