MARCHE-EN-FAMENNE (BE)
Quarry blast16 November 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 13:12:222021-11-16
- UTC
- 12:12:222021-11-16
Main parameters
| Date and time | 2021-11-16 12:12:22 UTC 2021-11-16 13:12:22 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.224° N, 5.419° E Uncertainty ± 0.3 km |
| Event ID | ROB 14755 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-16 16:39:35 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
- 4
- Epicentral distance
- 15.7 – 51.2km
- Mean velocity, P wave
- 6.0km/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: 4 measurements, root-mean-square deviation 0.07 s. S wave: 4 measurements, root-mean-square deviation 0.09 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)4 stations | |||||
| RCHRochefort | 15.7 | 241 | 12:12:25.57+3.20 s | 12:12:27.49+5.12 s | 1.92 |
| CLAClavier | 23.2 | 339 | 12:12:26.75+4.38 s | 12:12:29.66+7.29 s | 2.91 |
| GESGesves | 29.7 | 307 | 12:12:27.78+5.41 s | 12:12:31.71+9.34 s | 3.93 |
| KLBKalborn | 51.2 | 105 | 12:12:31.56+9.19 s | 12:12:37.74+15.37 s | 6.18 |