ANDENNE (BE)
Quarry blast14 October 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:41:012021-10-14
- UTC
- 11:41:012021-10-14
Main parameters
| Date and time | 2021-10-14 11:41:01 UTC 2021-10-14 13:41:01 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.476° N, 5.000° E Uncertainty ± 1.9 km |
| Event ID | ROB 14610 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-10-18 15:08:49 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
- 11.8 – 89.4km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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 0.33 s. S wave: 7 measurements, root-mean-square deviation 0.73 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 | 11.8 | 149 | 11:41:03.34+2.03 s | 11:41:05.40+4.09 s | 2.06 |
| CLAClavier | 22.3 | 106 | 11:41:05.52+4.21 s | 11:41:08.80+7.49 s | 3.28 |
| MRDMaredsous | 25.4 | 221 | 11:41:05.90+4.59 s | 11:41:08.46+7.15 s | 2.56 |
| RCHRochefort | 39.2 | 156 | 11:41:08.39+7.08 s | 11:41:14.62+13.31 s | 6.23 |
| DOUDourbes | 51.3 | 214 | 11:41:10.69+9.38 s | 11:41:17.25+15.94 s | 6.56 |
| KLBKalborn | 89.4 | 117 | 11:41:16.92+15.61 s | 11:41:26.93+25.62 s | 10.01 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.3 | 64 | 11:41:13.57+12.26 s | 11:41:23.44+22.13 s | 9.87 |