ROCHEFORT (BE)
Quarry blast4 February 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 12:12:322022-02-04
- UTC
- 11:12:322022-02-04
Main parameters
| Date and time | 2022-02-04 11:12:32 UTC 2022-02-04 12:12:32 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.169° N, 5.242° E Uncertainty ± 0.6 km |
| Event ID | ROB 15375 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:25:56 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
- 1.9 – 73.3km
- 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: 6 measurements, root-mean-square deviation 0.16 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 | 1.9 | 215 | 11:12:32.74+0.45 s | 11:12:33.25+0.96 s | 0.51 |
| GESGesves | 26.5 | 335 | 11:12:37.38+5.09 s | 11:12:40.60+8.31 s | 3.22 |
| CLAClavier | 28.1 | 9 | 11:12:37.57+5.28 s | 11:12:41.02+8.73 s | 3.45 |
| MRDMaredsous | 36.9 | 294 | 11:12:39.04+6.75 s | 11:12:43.43+11.14 s | 4.39 |
| DOUDourbes | 47.0 | 260 | 11:12:40.59+8.30 s | 11:12:46.26+13.97 s | 5.67 |
| KLBKalborn | 62.4 | 97 | 11:12:42.97+10.68 s | 11:12:50.53+18.24 s | 7.56 |
| MEMHMembach | 73.3 | 48 | 11:12:45.62+13.33 s | – | – |