ANDENNE (BE)
Quarry blast3 November 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:48:082021-11-03
- UTC
- 12:48:082021-11-03
Main parameters
| Date and time | 2021-11-03 12:48:08 UTC 2021-11-03 13:48:08 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.475° N, 4.968° E Uncertainty ± 1.1 km |
| Event ID | ROB 14680 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-08 14:13:09 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
- 13.1 – 91.4km
- Mean velocity, P wave
- 5.8km/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: 11 measurements, root-mean-square deviation 0.55 s. S wave: 9 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)10 stations | |||||
| GESGesves | 13.1 | 140 | 12:48:10.85+2.43 s | 12:48:13.11+4.69 s | 2.26 |
| MRDMaredsous | 23.9 | 217 | 12:48:12.05+3.63 s | – | – |
| CLAClavier | 24.5 | 104 | 12:48:12.93+4.51 s | 12:48:16.20+7.78 s | 3.27 |
| RCHRochefort | 40.1 | 152 | 12:48:15.57+7.15 s | 12:48:20.58+12.16 s | 5.01 |
| DOUDourbes | 49.9 | 212 | 12:48:18.21+9.79 s | 12:48:23.48+15.06 s | 5.27 |
| UCCBUccle | 56.0 | 310 | 12:48:18.42+10.00 s | 12:48:25.36+16.94 s | 6.94 |
| SKQSteenkerque | 65.8 | 287 | 12:48:19.37+10.95 s | – | – |
| MEMSMembach | 75.4 | 78 | 12:48:21.99+13.57 s | 12:48:30.88+22.46 s | 8.89 |
| MEMHMembach | 75.4 | 78 | 12:48:22.03+13.61 s | 12:48:30.84+22.42 s | 8.81 |
| KLBKalborn | 91.4 | 117 | 12:48:25.09+16.67 s | 12:48:35.03+26.61 s | 9.94 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 75.4 | 64 | 12:48:20.86+12.44 s | 12:48:30.62+22.20 s | 9.76 |