ANDENNE (BE)
Quarry blast19 November 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:45:332021-11-19
- UTC
- 12:45:332021-11-19
Main parameters
| Date and time | 2021-11-19 12:45:33 UTC 2021-11-19 13:45:33 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.483° N, 5.002° E Uncertainty ± 1.1 km |
| Event ID | ROB 14815 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-19 16:01:29 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
- 6
- Epicentral distance
- 12.5 – 52.1km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 6 measurements, root-mean-square deviation 0.22 s. S wave: 6 measurements, root-mean-square deviation 0.44 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 | 12.5 | 151 | 12:45:35.52+2.03 s | 12:45:37.43+3.94 s | 1.91 |
| CLAClavier | 22.5 | 109 | 12:45:37.43+3.94 s | 12:45:41.06+7.57 s | 3.63 |
| MRDMaredsous | 26.2 | 220 | 12:45:37.97+4.48 s | 12:45:41.99+8.50 s | 4.02 |
| RCHRochefort | 39.9 | 156 | 12:45:40.81+7.32 s | 12:45:46.71+13.22 s | 5.90 |
| SNFSeneffe | 51.1 | 274 | 12:45:42.41+8.92 s | 12:45:48.96+15.47 s | 6.55 |
| DOUDourbes | 52.1 | 214 | 12:45:42.63+9.14 s | 12:45:49.24+15.75 s | 6.61 |