ANDENNE (BE)
Quarry blast13 October 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:20:312021-10-13
- UTC
- 12:20:312021-10-13
Main parameters
| Date and time | 2021-10-13 12:20:31 UTC 2021-10-13 14:20:31 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.504° N, 4.982° E Uncertainty ± 0.6 km |
| Event ID | ROB 14585 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-10-13 22:58:51 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
- 15.2 – 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: 10 measurements, root-mean-square deviation 0.31 s. S wave: 9 measurements, root-mean-square deviation 0.40 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)9 stations | |||||
| GESGesves | 15.2 | 151 | 12:20:33.49+2.24 s | 12:20:35.91+4.66 s | 2.42 |
| CLAClavier | 24.6 | 113 | 12:20:35.63+4.38 s | 12:20:39.19+7.94 s | 3.56 |
| MRDMaredsous | 27.2 | 214 | 12:20:36.18+4.93 s | 12:20:39.96+8.71 s | 3.78 |
| TGATangissart | 34.5 | 289 | 12:20:37.20+5.95 s | 12:20:42.01+10.76 s | 4.81 |
| RCHRochefort | 42.6 | 156 | 12:20:38.78+7.53 s | 12:20:43.98+12.73 s | 5.20 |
| SNFSeneffe | 49.6 | 271 | 12:20:39.66+8.41 s | 12:20:46.47+15.22 s | 6.81 |
| DOUDourbes | 53.2 | 211 | 12:20:40.80+9.55 s | 12:20:47.56+16.31 s | 6.76 |
| SKQSteenkerque | 65.9 | 284 | 12:20:42.18+10.93 s | 12:20:50.12+18.87 s | 7.94 |
| KLBKalborn | 92.0 | 119 | 12:20:47.54+16.29 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.1 | 66 | 12:20:43.88+12.63 s | 12:20:53.15+21.90 s | 9.27 |