NAMUR (BE)
Quarry blast12 October 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:17:272022-10-12
- UTC
- 12:17:272022-10-12
Main parameters
| Date and time | 2022-10-12 12:17:27 UTC 2022-10-12 14:17:27 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.493° N, 4.979° E Uncertainty ± 2.8 km |
| Event ID | ROB 17350 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-14 10:26:28 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
- 9
- Epicentral distance
- 14.2 – 95.9km
- Mean velocity, P wave
- 5.8km/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: 9 measurements, root-mean-square deviation 0.32 s. S wave: 6 measurements, root-mean-square deviation 0.46 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 | 14.2 | 147 | 12:17:29.29+2.20 s | 12:17:30.93+3.84 s | 1.64 |
| CLAClavier | 24.4 | 110 | 12:17:31.19+4.10 s | 12:17:34.92+7.83 s | 3.73 |
| MRDMaredsous | 26.0 | 215 | 12:17:31.95+4.86 s | 12:17:35.66+8.57 s | 3.71 |
| TGATangissart | 34.7 | 291 | 12:17:32.94+5.85 s | 12:17:37.44+10.35 s | 4.50 |
| DOUDourbes | 52.0 | 212 | 12:17:36.58+9.49 s | – | – |
| KLBKalborn | 91.6 | 118 | 12:17:43.30+16.21 s | 12:17:53.70+26.61 s | 10.40 |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 71.9 | 66 | 12:17:39.27+12.18 s | – | – |
| HGNHeimansgroeve | 73.9 | 66 | 12:17:39.61+12.52 s | – | – |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 95.9 | 79 | 12:17:43.93+16.84 s | 12:17:55.11+28.02 s | 11.18 |