ANDENNE (BE)
Quarry blast26 November 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:49:482021-11-26
- UTC
- 12:49:482021-11-26
Main parameters
| Date and time | 2021-11-26 12:49:48 UTC 2021-11-26 13:49:48 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.467° N, 4.999° E Uncertainty ± 2.0 km |
| Event ID | ROB 14880 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-06 13:49:26 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
- 11.0 – 104.3km
- Mean velocity, P wave
- 5.8km/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 0.24 s. S wave: 4 measurements, root-mean-square deviation 0.20 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 | 11.0 | 145 | 12:49:50.13+1.78 s | 12:49:52.18+3.83 s | 2.05 |
| CLAClavier | 22.2 | 104 | 12:49:52.07+3.72 s | 12:49:55.44+7.09 s | 3.37 |
| MRDMaredsous | 24.6 | 222 | 12:49:52.65+4.30 s | 12:49:56.10+7.75 s | 3.45 |
| DOUDourbes | 50.4 | 215 | 12:49:57.42+9.07 s | 12:50:03.69+15.34 s | 6.27 |
| KLBKalborn | 89.0 | 117 | 12:50:04.10+15.75 s | – | – |
| VIAVianden | 104.3 | 124 | 12:50:06.19+17.84 s | – | – |