ANDENNE (BE)
Quarry blast14 January 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:31:022021-01-14
- UTC
- 13:31:022021-01-14
Main parameters
| Date and time | 2021-01-14 13:31:02 UTC 2021-01-14 14:31:02 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.476° N, 4.998° E Uncertainty ± 0.8 km |
| Event ID | ROB 11895 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-01-14 23:04:16 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
- 10
- Epicentral distance
- 12.0 – 89.5km
- Mean velocity, P wave
- 5.9km/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: 10 measurements, root-mean-square deviation 0.49 s. S wave: 8 measurements, root-mean-square deviation 0.35 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)8 stations | |||||
| GESGesves | 12.0 | 148 | 13:31:04.10+1.90 s | – | – |
| CLAClavier | 22.5 | 106 | 13:31:06.18+3.98 s | 13:31:09.75+7.55 s | 3.57 |
| MRDMaredsous | 25.4 | 220 | 13:31:06.50+4.30 s | 13:31:10.54+8.34 s | 4.04 |
| RCHRochefort | 39.3 | 155 | 13:31:09.16+6.96 s | 13:31:14.59+12.39 s | 5.43 |
| DOUDourbes | 51.2 | 214 | 13:31:11.27+9.07 s | 13:31:17.60+15.40 s | 6.33 |
| MEMHMembach | 73.2 | 78 | 13:31:15.10+12.90 s | 13:31:23.84+21.64 s | 8.74 |
| MRGMont Rigi | 76.5 | 87 | 13:31:15.44+13.24 s | 13:31:25.04+22.84 s | 9.60 |
| KLBKalborn | 89.5 | 117 | 13:31:17.67+15.47 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 70.6 | 52 | 13:31:15.93+13.73 s | 13:31:23.61+21.41 s | 7.68 |
| HGNHeimansgroeve | 73.4 | 64 | 13:31:14.75+12.55 s | 13:31:23.86+21.66 s | 9.11 |