NAMUR (BE)
Quarry blast8 November 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:46:512022-11-08
- UTC
- 12:46:512022-11-08
Main parameters
| Date and time | 2022-11-08 12:46:51 UTC 2022-11-08 13:46:51 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.500° N, 4.968° E Uncertainty ± 0.8 km |
| Event ID | ROB 17680 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:40:55 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
- 10
- Epicentral distance
- 15.3 – 108.2km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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: 10 measurements, root-mean-square deviation 0.26 s. S wave: 5 measurements, root-mean-square deviation 0.26 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 | 15.3 | 146 | 12:46:54.35+2.43 s | 12:46:56.47+4.55 s | 2.12 |
| CLAClavier | 25.4 | 111 | 12:46:56.25+4.33 s | 12:46:59.74+7.82 s | 3.49 |
| MRDMaredsous | 26.2 | 213 | 12:46:56.88+4.96 s | 12:47:00.38+8.46 s | 3.50 |
| TGATangissart | 33.7 | 290 | 12:46:58.00+6.08 s | 12:47:02.17+10.25 s | 4.17 |
| DOUDourbes | 52.3 | 211 | 12:47:01.59+9.67 s | 12:47:07.43+15.51 s | 5.84 |
| MRGMont Rigi | 78.6 | 89 | 12:47:05.68+13.76 s | – | – |
| KLBKalborn | 92.7 | 118 | 12:47:08.30+16.38 s | – | – |
| VIAVianden | 108.2 | 125 | 12:47:11.03+19.11 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 72.3 | 66 | 12:47:04.30+12.38 s | – | – |
| HGNHeimansgroeve | 74.3 | 66 | 12:47:04.71+12.79 s | – | – |