MARCHE-EN-FAMENNE (BE)
Quarry blast11 August 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:10:422022-08-11
- UTC
- 10:10:422022-08-11
Main parameters
| Date and time | 2022-08-11 10:10:42 UTC 2022-08-11 12:10:42 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.166° N, 5.269° E Uncertainty ± 0.7 km |
| Event ID | ROB 16800 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-11 23:27:51 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
- 3.3 – 60.5km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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 0.20 s. S wave: 6 measurements, root-mean-square deviation 0.23 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 | 3.3 | 247 | 10:10:42.87+0.58 s | 10:10:43.20+0.91 s | 0.33 |
| GESGesves | 27.6 | 332 | 10:10:46.79+4.50 s | 10:10:51.02+8.73 s | 4.23 |
| CLAClavier | 28.2 | 5 | 10:10:47.49+5.20 s | 10:10:51.12+8.83 s | 3.63 |
| MRDMaredsous | 38.8 | 293 | 10:10:49.33+7.04 s | 10:10:54.27+11.98 s | 4.94 |
| DOUDourbes | 48.9 | 261 | 10:10:50.95+8.66 s | 10:10:57.27+14.98 s | 6.32 |
| KLBKalborn | 60.5 | 97 | 10:10:53.14+10.85 s | 10:11:00.32+18.03 s | 7.18 |