NAMUR (BE)
Quarry blast6 December 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:53:102022-12-06
- UTC
- 13:53:102022-12-06
Main parameters
| Date and time | 2022-12-06 13:53:10 UTC 2022-12-06 14:53:10 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.453° N, 4.947° E Uncertainty ± 2.3 km |
| Event ID | ROB 17970 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-14 16:07:45 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
- 12.5 – 99.1km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.61 s. S wave: 4 measurements, root-mean-square deviation 0.25 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 | 12.5 | 127 | 13:53:12.56+2.25 s | 13:53:14.64+4.33 s | 2.08 |
| MRDMaredsous | 21.1 | 217 | 13:53:14.15+3.84 s | 13:53:16.90+6.59 s | 2.75 |
| CLAClavier | 25.5 | 99 | 13:53:14.82+4.51 s | 13:53:18.76+8.45 s | 3.94 |
| DOUDourbes | 47.1 | 212 | 13:53:18.62+8.31 s | 13:53:24.85+14.54 s | 6.23 |
| MRGMont Rigi | 80.3 | 85 | 13:53:22.86+12.55 s | – | – |
| KLBKalborn | 91.7 | 115 | 13:53:26.99+16.68 s | – | – |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 99.1 | 77 | 13:53:27.83+17.52 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 77.8 | 63 | 13:53:23.25+12.94 s | – | – |