MARCHE-EN-FAMENNE (BE)
Quarry blast8 February 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:15:372022-02-08
- UTC
- 11:15:372022-02-08
Main parameters
| Date and time | 2022-02-08 11:15:37 UTC 2022-02-08 12:15:37 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.184° N, 5.251° E Uncertainty ± 0.8 km |
| Event ID | ROB 15420 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-09 15:33:22 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
- 3.7 – 80.6km
- Mean velocity, P wave
- 5.9km/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: 7 measurements, root-mean-square deviation 0.34 s. S wave: 6 measurements, root-mean-square deviation 0.27 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 | 3.7 | 208 | 11:15:37.72+0.66 s | 11:15:38.63+1.57 s | 0.91 |
| GESGesves | 25.2 | 332 | 11:15:41.75+4.69 s | 11:15:44.99+7.93 s | 3.24 |
| CLAClavier | 26.4 | 8 | 11:15:41.95+4.89 s | 11:15:45.66+8.60 s | 3.71 |
| MRDMaredsous | 36.8 | 291 | 11:15:43.16+6.10 s | 11:15:48.30+11.24 s | 5.14 |
| DOUDourbes | 47.9 | 258 | 11:15:45.12+8.06 s | 11:15:51.41+14.35 s | 6.29 |
| KLBKalborn | 62.1 | 98 | 11:15:47.87+10.81 s | 11:15:55.37+18.31 s | 7.50 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 80.6 | 37 | 11:15:51.65+14.59 s | – | – |