NAMUR (BE)
Quarry blast15 February 2023
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 11:04:142023-02-15
- UTC
- 10:04:142023-02-15
Main parameters
| Date and time | 2023-02-15 10:04:14 UTC 2023-02-15 11:04:14 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.516° N, 4.925° E Uncertainty ± 2.1 km |
| Event ID | ROB 18710 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-02-22 00:28:36 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
- 18.6 – 52.4km
- Mean velocity, P wave
- 5.0km/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 0.30 s. S wave: 5 measurements, root-mean-square deviation 0.47 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 | 18.6 | 142 | 10:04:17.92+3.27 s | 10:04:20.05+5.40 s | 2.13 |
| MRDMaredsous | 26.3 | 205 | 10:04:19.45+4.80 s | 10:04:23.23+8.58 s | 3.78 |
| CLAClavier | 28.9 | 112 | 10:04:19.96+5.31 s | 10:04:24.20+9.55 s | 4.24 |
| TGATangissart | 30.2 | 289 | 10:04:19.98+5.33 s | 10:04:23.81+9.16 s | 3.83 |
| DOUDourbes | 52.4 | 207 | 10:04:25.28+10.63 s | 10:04:30.45+15.80 s | 5.17 |