ANDENNE (BE)
Quarry blast17 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:49:172020-09-17
- UTC
- 11:49:172020-09-17
Main parameters
| Date and time | 2020-09-17 11:49:17 UTC 2020-09-17 13:49:17 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.463° N, 5.009° E Uncertainty ± 1.3 km |
| Event ID | ROB 10905 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-17 15:37:40 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
- 8
- Epicentral distance
- 10.3 – 88.2km
- Mean velocity, P wave
- 6.0km/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: 8 measurements, root-mean-square deviation 0.40 s. S wave: 8 measurements, root-mean-square deviation 0.86 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 | 10.3 | 147 | 11:49:18.75+1.70 s | 11:49:20.95+3.90 s | 2.20 |
| CLAClavier | 21.4 | 103 | 11:49:20.69+3.64 s | 11:49:23.75+6.70 s | 3.06 |
| MRDMaredsous | 24.8 | 224 | 11:49:21.06+4.01 s | 11:49:25.08+8.03 s | 4.02 |
| RCHRochefort | 37.6 | 156 | 11:49:23.79+6.74 s | 11:49:30.91+13.86 s | 7.12 |
| DOUDourbes | 50.5 | 216 | 11:49:25.91+8.86 s | 11:49:32.47+15.42 s | 6.56 |
| EBNEben-Emael | 60.2 | 52 | 11:49:27.73+10.68 s | 11:49:35.01+17.96 s | 7.28 |
| MEMHMembach | 72.8 | 77 | 11:49:29.70+12.65 s | 11:49:39.17+22.12 s | 9.47 |
| KLBKalborn | 88.2 | 117 | 11:49:32.77+15.72 s | 11:49:42.70+25.65 s | 9.93 |