ANDENNE (BE)
Quarry blast15 November 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:43:192021-11-15
- UTC
- 12:43:192021-11-15
Main parameters
| Date and time | 2021-11-15 12:43:19 UTC 2021-11-15 13:43:19 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.505° N, 4.976° E Uncertainty ± 1.1 km |
| Event ID | ROB 14740 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-16 12:28:49 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
- 15.6 – 92.5km
- Mean velocity, P wave
- 5.8km/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 0.36 s. S wave: 6 measurements, root-mean-square deviation 0.43 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 | 15.6 | 149 | 12:43:21.73+2.09 s | 12:43:24.24+4.60 s | 2.51 |
| CLAClavier | 25.1 | 112 | 12:43:24.09+4.45 s | 12:43:27.66+8.02 s | 3.57 |
| RCHRochefort | 42.9 | 155 | 12:43:27.24+7.60 s | 12:43:32.63+12.99 s | 5.39 |
| DOUDourbes | 53.1 | 211 | 12:43:29.35+9.71 s | 12:43:35.85+16.21 s | 6.50 |
| SKQSteenkerque | 65.4 | 284 | 12:43:30.71+11.07 s | – | – |
| KLBKalborn | 92.5 | 119 | 12:43:35.84+16.20 s | 12:43:46.26+26.62 s | 10.42 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.5 | 67 | 12:43:32.37+12.73 s | 12:43:41.76+22.12 s | 9.39 |