ANDENNE (BE)
Quarry blast16 November 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:21:512021-11-16
- UTC
- 13:21:512021-11-16
Main parameters
| Date and time | 2021-11-16 13:21:51 UTC 2021-11-16 14:21:51 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.494° N, 4.990° E Uncertainty ± 2.3 km |
| Event ID | ROB 14760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-16 16:39:53 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
- 7
- Epicentral distance
- 13.9 – 91.0km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.54 s. S wave: 7 measurements, root-mean-square deviation 0.56 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)6 stations | |||||
| GESGesves | 13.9 | 150 | 13:21:54.02+2.28 s | 13:21:55.95+4.21 s | 1.93 |
| CLAClavier | 23.7 | 110 | 13:21:56.08+4.34 s | 13:21:59.76+8.02 s | 3.68 |
| MRDMaredsous | 26.5 | 217 | 13:21:56.39+4.65 s | 13:22:00.01+8.27 s | 3.62 |
| RCHRochefort | 41.3 | 156 | 13:21:59.19+7.45 s | 13:22:05.47+13.73 s | 6.28 |
| DOUDourbes | 52.5 | 213 | 13:22:01.27+9.53 s | 13:22:07.72+15.98 s | 6.45 |
| KLBKalborn | 91.0 | 118 | 13:22:07.82+16.08 s | 13:22:18.21+26.47 s | 10.39 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.1 | 65 | 13:22:03.21+11.47 s | 13:22:13.90+22.16 s | 10.69 |