ANDENNE (BE)
Quarry blast16 February 2023
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:19:392023-02-16
- UTC
- 13:19:392023-02-16
Main parameters
| Date and time | 2023-02-16 13:19:39 UTC 2023-02-16 14:19:39 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.505° N, 4.997° E Uncertainty ± 1.9 km |
| Event ID | ROB 18730 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-02-22 00:30:13 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
- 14.8 – 53.9km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.2km/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 0.25 s. S wave: 4 measurements, root-mean-square deviation 0.35 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 | 14.8 | 154 | 13:19:42.32+2.54 s | 13:19:44.21+4.43 s | 1.89 |
| CLAClavier | 23.7 | 114 | 13:19:44.35+4.57 s | 13:19:47.72+7.94 s | 3.37 |
| MRDMaredsous | 27.9 | 216 | 13:19:44.92+5.14 s | 13:19:48.93+9.15 s | 4.01 |
| TGATangissart | 35.4 | 288 | 13:19:45.74+5.96 s | 13:19:50.65+10.87 s | 4.91 |
| DOUDourbes | 53.9 | 212 | 13:19:49.62+9.84 s | – | – |