NAMUR (BE)
Quarry blast3 August 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:43:322022-08-03
- UTC
- 11:43:322022-08-03
Main parameters
| Date and time | 2022-08-03 11:43:32 UTC 2022-08-03 13:43:32 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.489° N, 4.968° E Uncertainty ± 1.5 km |
| Event ID | ROB 16740 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:32:19 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
- 14.3 – 54.2km
- Mean velocity, P wave
- 5.4km/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 0.30 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)8 stations | |||||
| GESGesves | 14.3 | 144 | 11:43:35.03+2.57 s | 11:43:36.85+4.39 s | 1.82 |
| CLAClavier | 25.0 | 108 | 11:43:37.09+4.63 s | 11:43:39.84+7.38 s | 2.75 |
| MRDMaredsous | 25.2 | 214 | 11:43:36.56+4.10 s | – | – |
| TGATangissart | 34.1 | 292 | 11:43:38.49+6.03 s | 11:43:42.78+10.32 s | 4.29 |
| RCHRochefort | 41.5 | 153 | 11:43:39.91+7.45 s | 11:43:45.68+13.22 s | 5.77 |
| LCHLa Chartreuse | 47.7 | 69 | 11:43:40.98+8.52 s | – | – |
| DOUDourbes | 51.2 | 211 | 11:43:42.25+9.79 s | – | – |
| RQRRonquières | 54.2 | 284 | 11:43:41.79+9.33 s | – | – |