ANDENNE (BE)
Quarry blast9 February 2023
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:21:552023-02-09
- UTC
- 13:21:552023-02-09
Main parameters
| Date and time | 2023-02-09 13:21:55 UTC 2023-02-09 14:21:55 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.494° N, 4.990° E Uncertainty ± 1.9 km |
| Event ID | ROB 18645 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-02-10 12:01:40 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
- 6
- Epicentral distance
- 13.9 – 52.6km
- Mean velocity, P wave
- 5.6km/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: 6 measurements, root-mean-square deviation 0.16 s. S wave: 4 measurements, root-mean-square deviation 0.51 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 | 13.9 | 150 | 13:21:57.93+2.54 s | 13:21:59.39+4.00 s | 1.46 |
| CLAClavier | 23.6 | 110 | 13:21:59.89+4.50 s | 13:22:03.28+7.89 s | 3.39 |
| MRDMaredsous | 26.6 | 217 | 13:22:00.32+4.93 s | 13:22:04.18+8.79 s | 3.86 |
| TGATangissart | 35.4 | 291 | 13:22:01.55+6.16 s | 13:22:05.80+10.41 s | 4.25 |
| SNFSeneffe | 50.2 | 272 | 13:22:04.45+9.06 s | – | – |
| DOUDourbes | 52.6 | 213 | 13:22:05.08+9.69 s | – | – |