MARCHE-EN-FAMENNE (BE)
Quarry blast18 August 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:03:222022-08-18
- UTC
- 10:03:222022-08-18
Main parameters
| Date and time | 2022-08-18 10:03:22 UTC 2022-08-18 12:03:22 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.183° N, 5.259° E Uncertainty ± 1.0 km |
| Event ID | ROB 16855 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-18 15:16:50 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
- 5
- Epicentral distance
- 3.9 – 61.4km
- Mean velocity, P wave
- 5.8km/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: 5 measurements, root-mean-square deviation 0.21 s. S wave: 5 measurements, root-mean-square deviation 0.25 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)5 stations | |||||
| RCHRochefort | 3.9 | 216 | 10:03:23.11+0.70 s | 10:03:23.88+1.47 s | 0.77 |
| GESGesves | 25.6 | 331 | 10:03:27.25+4.84 s | 10:03:30.67+8.26 s | 3.42 |
| CLAClavier | 26.4 | 7 | 10:03:27.55+5.14 s | 10:03:30.11+7.70 s | 2.56 |
| DOUDourbes | 48.5 | 259 | 10:03:30.84+8.43 s | 10:03:37.01+14.60 s | 6.17 |
| KLBKalborn | 61.4 | 98 | 10:03:33.23+10.82 s | 10:03:40.82+18.41 s | 7.59 |