ROCHEFORT (BE)
Quarry blast21 October 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:48:492022-10-21
- UTC
- 10:48:492022-10-21
Main parameters
| Date and time | 2022-10-21 10:48:49 UTC 2022-10-21 12:48:49 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.182° N, 5.237° E Uncertainty ± 0.8 km |
| Event ID | ROB 17435 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-22 18:58:54 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
- 7
- Epicentral distance
- 3.1 – 63.0km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.5km/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: 7 measurements, root-mean-square deviation 0.25 s. S wave: 7 measurements, root-mean-square deviation 0.39 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)7 stations | |||||
| RCHRochefort | 3.1 | 194 | 10:48:49.99+0.63 s | 10:48:50.45+1.09 s | 0.46 |
| GESGesves | 24.9 | 335 | 10:48:54.08+4.72 s | 10:48:57.47+8.11 s | 3.39 |
| CLAClavier | 26.7 | 10 | 10:48:54.22+4.86 s | 10:48:57.77+8.41 s | 3.55 |
| MRDMaredsous | 36.0 | 292 | 10:48:55.97+6.61 s | 10:49:00.00+10.64 s | 4.03 |
| DOUDourbes | 47.0 | 258 | 10:48:57.80+8.44 s | 10:49:03.72+14.36 s | 5.92 |
| HOUHouvegnez | 57.9 | 70 | 10:49:00.08+10.72 s | 10:49:05.81+16.45 s | 5.73 |
| KLBKalborn | 63.0 | 98 | 10:49:00.13+10.77 s | 10:49:08.11+18.75 s | 7.98 |