NAMUR (BE)
Quarry blast7 April 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:15:392022-04-07
- UTC
- 12:15:392022-04-07
Main parameters
| Date and time | 2022-04-07 12:15:39 UTC 2022-04-07 14:15:39 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.495° N, 4.969° E Uncertainty ± 0.6 km |
| Event ID | ROB 15905 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-09 12:44:33 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
- 14.8 – 75.2km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.25 s. S wave: 6 measurements, root-mean-square deviation 0.28 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)8 stations | |||||
| GESGesves | 14.8 | 145 | 12:15:41.92+2.60 s | 12:15:43.99+4.67 s | 2.07 |
| CLAClavier | 25.1 | 109 | 12:15:43.93+4.61 s | – | – |
| MRDMaredsous | 25.8 | 214 | 12:15:44.16+4.84 s | – | – |
| TGATangissart | 34.0 | 291 | 12:15:45.30+5.98 s | 12:15:49.79+10.47 s | 4.49 |
| RCHRochefort | 42.0 | 154 | 12:15:46.69+7.37 s | 12:15:52.35+13.03 s | 5.66 |
| DOUDourbes | 51.8 | 211 | 12:15:49.05+9.73 s | 12:15:54.86+15.54 s | 5.81 |
| MEMHMembach | 74.8 | 80 | 12:15:52.30+12.98 s | 12:16:01.72+22.40 s | 9.42 |
| HOUHouvegnez | 75.2 | 102 | 12:15:52.33+13.01 s | 12:16:01.14+21.82 s | 8.81 |