WANZE (BE)
Quarry blast20 September 2023
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:44:532023-09-20
- UTC
- 11:44:532023-09-20
Main parameters
| Date and time | 2023-09-20 11:44:53 UTC 2023-09-20 13:44:53 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.569° N, 5.202° E Uncertainty ± 0.7 km |
| Event ID | ROB 20250 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-09-22 18:26:46 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
- 4
- Epicentral distance
- 18.1 – 42.8km
- Mean velocity, P wave
- 6.5km/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: 4 measurements, root-mean-square deviation 0.17 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)4 stations | |||||
| CLAClavier | 18.1 | 157 | 11:44:57.32+3.94 s | 11:44:59.30+5.92 s | 1.98 |
| GESGesves | 22.0 | 202 | 11:44:57.67+4.29 s | 11:45:00.15+6.77 s | 2.48 |
| STISart Tilman | 25.7 | 86 | 11:44:58.03+4.65 s | – | – |
| MRDMaredsous | 42.8 | 226 | 11:45:01.01+7.63 s | – | – |
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