NAMUR (BE)
Quarry blast3 February 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:14:082022-02-03
- UTC
- 13:14:082022-02-03
Main parameters
| Date and time | 2022-02-03 13:14:08 UTC 2022-02-03 14:14:08 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.478° N, 4.949° E Uncertainty ± 2.9 km |
| Event ID | ROB 15370 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:25:42 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
- 7
- Epicentral distance
- 14.3 – 73.2km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.2km/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 0.43 s. S wave: 4 measurements, root-mean-square deviation 0.80 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)6 stations | |||||
| GESGesves | 14.3 | 137 | 13:14:10.38+2.10 s | 13:14:12.06+3.78 s | 1.68 |
| MRDMaredsous | 23.5 | 213 | 13:14:12.76+4.48 s | 13:14:16.68+8.40 s | 3.92 |
| CLAClavier | 25.9 | 105 | 13:14:12.45+4.17 s | 13:14:15.62+7.34 s | 3.17 |
| TGATangissart | 33.4 | 295 | 13:14:13.71+5.43 s | 13:14:17.87+9.59 s | 4.16 |
| RCHRochefort | 41.1 | 151 | 13:14:15.22+6.94 s | – | – |
| RQRRonquières | 53.2 | 286 | 13:14:16.87+8.59 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| VKBValkenburg | 73.2 | 53 | 13:14:21.76+13.48 s | – | – |