MARCHE-EN-FAMENNE (BE)
Quarry blast7 January 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:34:432022-01-07
- UTC
- 11:34:432022-01-07
Main parameters
| Date and time | 2022-01-07 11:34:43 UTC 2022-01-07 12:34:43 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.186° N, 5.249° E Uncertainty ± 0.6 km |
| Event ID | ROB 15125 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-10 10:34:53 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
- 3.8 – 62.2km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.4km/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 0.24 s. S wave: 6 measurements, root-mean-square deviation 0.22 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 | 3.8 | 205 | 11:34:44.44+0.70 s | 11:34:45.20+1.46 s | 0.76 |
| GESGesves | 25.0 | 333 | 11:34:48.55+4.81 s | 11:34:51.89+8.15 s | 3.34 |
| CLAClavier | 26.2 | 8 | 11:34:48.21+4.47 s | 11:34:52.20+8.46 s | 3.99 |
| MRDMaredsous | 36.7 | 291 | 11:34:49.96+6.22 s | 11:34:55.15+11.41 s | 5.19 |
| DOUDourbes | 47.8 | 258 | 11:34:51.89+8.15 s | 11:34:58.20+14.46 s | 6.31 |
| KLBKalborn | 62.2 | 98 | 11:34:54.60+10.86 s | 11:35:02.39+18.65 s | 7.79 |