NAMUR (BE)
Quarry blast4 November 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:50:242022-11-04
- UTC
- 11:50:242022-11-04
Main parameters
| Date and time | 2022-11-04 11:50:24 UTC 2022-11-04 12:50:24 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.497° N, 4.981° E Uncertainty ± 0.9 km |
| Event ID | ROB 17630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:37:59 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
- 11
- Epicentral distance
- 14.6 – 95.7km
- Mean velocity, P wave
- 5.8km/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: 11 measurements, root-mean-square deviation 0.22 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 | 14.6 | 149 | 11:50:26.85+2.46 s | 11:50:28.81+4.42 s | 1.96 |
| CLAClavier | 24.4 | 111 | 11:50:28.71+4.32 s | 11:50:32.28+7.89 s | 3.57 |
| MRDMaredsous | 26.5 | 215 | 11:50:29.35+4.96 s | – | – |
| TGATangissart | 34.7 | 290 | 11:50:30.47+6.08 s | – | – |
| MEMHMembach | 74.0 | 80 | 11:50:37.35+12.96 s | – | – |
| MEMSMembach | 74.0 | 80 | 11:50:37.40+13.01 s | – | – |
| MRGMont Rigi | 77.6 | 88 | 11:50:38.16+13.77 s | – | – |
| KLBKalborn | 91.7 | 118 | 11:50:40.35+15.96 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 71.6 | 66 | 11:50:36.30+11.91 s | – | – |
| HGNHeimansgroeve | 73.5 | 66 | 11:50:36.97+12.58 s | – | – |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 95.7 | 79 | 11:50:41.04+16.65 s | – | – |
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