ANDENNE (BE)
Quarry blast12 November 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:25:572020-11-12
- UTC
- 13:25:572020-11-12
Main parameters
| Date and time | 2020-11-12 13:25:57 UTC 2020-11-12 14:25:57 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.463° N, 5.019° E Uncertainty ± 1.0 km |
| Event ID | ROB 11290 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-12 18:58:00 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
- 9.9 – 87.5km
- 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: 7 measurements, root-mean-square deviation 0.30 s. S wave: 7 measurements, root-mean-square deviation 0.36 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 | 9.9 | 151 | 13:25:59.56+1.72 s | 13:26:01.34+3.50 s | 1.78 |
| CLAClavier | 20.7 | 103 | 13:26:01.37+3.53 s | 13:26:04.99+7.15 s | 3.62 |
| MRDMaredsous | 25.3 | 225 | 13:26:02.07+4.23 s | 13:26:05.98+8.14 s | 3.91 |
| RCHRochefort | 37.3 | 157 | 13:26:04.58+6.74 s | 13:26:09.08+11.24 s | 4.50 |
| DOUDourbes | 50.9 | 217 | 13:26:06.72+8.88 s | 13:26:13.52+15.68 s | 6.80 |
| KLBKalborn | 87.5 | 117 | 13:26:13.35+15.51 s | 13:26:23.54+25.70 s | 10.19 |
| Dutch seismic network (KNMI)1 station | |||||
| VKBValkenburg | 70.4 | 50 | 13:26:10.19+12.35 s | 13:26:18.69+20.85 s | 8.50 |