FOSSES-LA-VILLE (BE)
Quarry blast25 April 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:01:292022-04-25
- UTC
- 09:01:292022-04-25
Main parameters
| Date and time | 2022-04-25 09:01:29 UTC 2022-04-25 11:01:29 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.407° N, 4.636° E Uncertainty ± 0.4 km |
| Event ID | ROB 15985 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-25 16:02:40 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
- 15.0 – 47.4km
- Mean velocity, P wave
- 5.8km/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: 5 measurements, root-mean-square deviation 0.30 s. S wave: 5 measurements, root-mean-square deviation 0.13 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 | |||||
| MRDMaredsous | 15.0 | 141 | 09:01:31.34+2.29 s | 09:01:34.06+5.01 s | 2.72 |
| TGATangissart | 23.4 | 340 | 09:01:33.55+4.50 s | 09:01:36.31+7.26 s | 2.76 |
| GESGesves | 32.2 | 94 | 09:01:35.09+6.04 s | 09:01:39.10+10.05 s | 4.01 |
| DOUDourbes | 34.9 | 185 | 09:01:35.42+6.37 s | 09:01:39.73+10.68 s | 4.31 |
| CLAClavier | 47.4 | 88 | 09:01:37.31+8.26 s | 09:01:43.44+14.39 s | 6.13 |