ANDENNE (BE)
Quarry blast23 November 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:30:342021-11-23
- UTC
- 13:30:342021-11-23
Main parameters
| Date and time | 2021-11-23 13:30:34 UTC 2021-11-23 14:30:34 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.507° N, 4.984° E Uncertainty ± 0.9 km |
| Event ID | ROB 14845 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-26 13:59:18 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
- 15.4 – 92.0km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.19 s. S wave: 8 measurements, root-mean-square deviation 0.30 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 | 15.4 | 151 | 13:30:37.23+2.55 s | 13:30:39.30+4.62 s | 2.07 |
| CLAClavier | 24.6 | 113 | 13:30:39.01+4.33 s | 13:30:42.78+8.10 s | 3.77 |
| MRDMaredsous | 27.4 | 214 | 13:30:39.69+5.01 s | 13:30:43.49+8.81 s | 3.80 |
| TGATangissart | 34.5 | 289 | 13:30:40.76+6.08 s | 13:30:45.22+10.54 s | 4.46 |
| RCHRochefort | 42.8 | 156 | 13:30:42.25+7.57 s | 13:30:48.14+13.46 s | 5.89 |
| SNFSeneffe | 49.6 | 271 | 13:30:43.61+8.93 s | 13:30:49.59+14.91 s | 5.98 |
| DOUDourbes | 53.5 | 211 | 13:30:44.31+9.63 s | 13:30:50.77+16.09 s | 6.46 |
| KLBKalborn | 92.0 | 119 | 13:30:50.75+16.07 s | 13:31:01.99+27.31 s | 11.24 |