NAMUR (BE)
Quarry blast17 October 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:14:262022-10-17
- UTC
- 12:14:262022-10-17
Main parameters
| Date and time | 2022-10-17 12:14:26 UTC 2022-10-17 14:14:26 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.467° N, 4.960° E Uncertainty ± 1.6 km |
| Event ID | ROB 17410 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-22 18:55:15 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
- 12.9 – 39.6km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.1km/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 0.39 s. S wave: 5 measurements, root-mean-square deviation 0.19 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 | |||||
| GESGesves | 12.9 | 135 | 12:14:28.71+2.23 s | 12:14:30.68+4.20 s | 1.97 |
| MRDMaredsous | 22.9 | 217 | 12:14:31.18+4.70 s | 12:14:33.43+6.95 s | 2.25 |
| CLAClavier | 24.9 | 102 | 12:14:30.61+4.13 s | 12:14:34.60+8.12 s | 3.99 |
| TGATangissart | 34.6 | 296 | 12:14:32.27+5.79 s | 12:14:37.53+11.05 s | 5.26 |
| RCHRochefort | 39.6 | 151 | 12:14:33.92+7.44 s | 12:14:39.26+12.78 s | 5.34 |