ANDENNE (BE)
Quarry blast25 June 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:46:162020-06-25
- UTC
- 11:46:162020-06-25
Main parameters
| Date and time | 2020-06-25 11:46:16 UTC 2020-06-25 13:46:16 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.490° N, 5.014° E Uncertainty ± 1.1 km |
| Event ID | ROB 10365 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-25 17:01:25 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
- 5
- Epicentral distance
- 12.8 – 53.2km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 5 measurements, root-mean-square deviation 0.21 s. S wave: 5 measurements, root-mean-square deviation 0.15 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)5 stations | |||||
| GESGesves | 12.8 | 156 | 11:46:18.25+2.09 s | 11:46:20.38+4.22 s | 2.13 |
| CLAClavier | 21.9 | 111 | 11:46:20.30+4.14 s | 11:46:23.41+7.25 s | 3.11 |
| MRDMaredsous | 27.3 | 220 | 11:46:20.84+4.68 s | 11:46:24.72+8.56 s | 3.88 |
| RCHRochefort | 40.3 | 158 | 11:46:23.44+7.28 s | 11:46:28.68+12.52 s | 5.24 |
| DOUDourbes | 53.2 | 214 | 11:46:25.45+9.29 s | 11:46:32.57+16.41 s | 7.12 |