ROCHEFORT (BE)
Quarry blast29 November 2022
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 13:20:102022-11-29
- UTC
- 12:20:102022-11-29
Main parameters
| Date and time | 2022-11-29 12:20:10 UTC 2022-11-29 13:20:10 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.157° N, 5.340° E Uncertainty ± 6.7 km |
| Event ID | ROB 17895 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-01 16:22:14 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
- 8.1 – 55.3km
- Mean velocity, P wave
- 7.3km/s
- Mean velocity, S wave
- 3.6km/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 2.60 s. S wave: 4 measurements, root-mean-square deviation 0.40 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 | |||||
| RCHRochefort | 8.1 | 269 | 12:20:11.26+1.23 s | 12:20:12.60+2.57 s | 1.34 |
| CLAClavier | 29.3 | 355 | 12:20:15.81+5.78 s | 12:20:19.19+9.16 s | 3.38 |
| GESGesves | 31.2 | 325 | 12:20:15.46+5.43 s | 12:20:18.83+8.80 s | 3.37 |
| HOUHouvegnez | 52.2 | 65 | 12:20:20.86+10.83 s | – | – |
| DOUDourbes | 53.8 | 263 | 12:20:19.76+9.73 s | 12:20:25.99+15.96 s | 6.23 |
| KLBKalborn | 55.3 | 96 | 12:20:13.09+3.06 s | – | – |