ANDENNE (BE)
Quarry blast21 January 2022
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 13:55:442022-01-21
- UTC
- 12:55:442022-01-21
Main parameters
| Date and time | 2022-01-21 12:55:44 UTC 2022-01-21 13:55:44 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.513° N, 4.992° E Uncertainty ± 3.5 km |
| Event ID | ROB 15245 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-21 14:52:14 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
- 15.8 – 91.9km
- Mean velocity, P wave
- 5.7km/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 0.26 s. S wave: 6 measurements, root-mean-square deviation 0.37 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 | 15.8 | 155 | 12:55:46.56+2.22 s | 12:55:48.70+4.36 s | 2.14 |
| CLAClavier | 24.4 | 115 | 12:55:48.59+4.25 s | 12:55:51.84+7.50 s | 3.25 |
| MRDMaredsous | 28.4 | 214 | 12:55:49.15+4.81 s | 12:55:52.94+8.60 s | 3.79 |
| DOUDourbes | 54.4 | 211 | 12:55:53.76+9.42 s | 12:56:00.74+16.40 s | 6.98 |
| MRGMont Rigi | 76.8 | 90 | 12:55:58.15+13.81 s | – | – |
| KLBKalborn | 91.9 | 120 | 12:56:00.52+16.18 s | 12:56:10.76+26.42 s | 10.24 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 72.1 | 67 | 12:55:56.76+12.42 s | 12:56:05.15+20.81 s | 8.39 |