ANDENNE (BE)
Quarry blast23 February 2023
- Magnitude
- 1.1ML
- Depth
- 1.6km ± 5.0
- Belgian time
- 14:17:152023-02-23
- UTC
- 13:17:152023-02-23
Main parameters
| Date and time | 2023-02-23 13:17:15 UTC 2023-02-23 14:17:15 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.507° N, 4.990° E Uncertainty ± 1.8 km |
| Depth of hypocenter | 1.6 ± 5.0 km |
| Event ID | ROB 18875 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-02-25 15:39:39 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
- 15.2 – 50.1km
- Mean velocity, P wave
- 5.8km/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. Hypocenter at a depth of 1.6 km. P wave: 5 measurements, root-mean-square deviation 0.14 s. S wave: 4 measurements, root-mean-square deviation 0.45 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 | 15.2 | 153 | 13:17:17.99+2.48 s | 13:17:20.01+4.50 s | 2.02 |
| CLAClavier | 24.2 | 114 | 13:17:19.88+4.37 s | 13:17:23.31+7.80 s | 3.43 |
| MRDMaredsous | 27.8 | 215 | 13:17:20.48+4.97 s | 13:17:24.45+8.94 s | 3.97 |
| TGATangissart | 34.9 | 288 | 13:17:21.78+6.27 s | 13:17:25.51+10.00 s | 3.73 |
| SNFSeneffe | 50.1 | 271 | 13:17:24.27+8.76 s | – | – |
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