MARCHE-EN-FAMENNE (BE)
Quarry blast29 October 2021
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:27:052021-10-29
- UTC
- 10:27:052021-10-29
Main parameters
| Date and time | 2021-10-29 10:27:05 UTC 2021-10-29 12:27:05 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.179° N, 5.254° E Uncertainty ± 3.1 km |
| Event ID | ROB 14710 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-08 14:25:09 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
- 3.3 – 61.7km
- 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: 4 measurements, root-mean-square deviation 0.13 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 | 3.3 | 216 | 10:27:06.12+0.53 s | 10:27:06.87+1.28 s | 0.75 |
| CLAClavier | 26.9 | 7 | 10:27:10.32+4.73 s | 10:27:13.70+8.11 s | 3.38 |
| DOUDourbes | 48.1 | 259 | 10:27:13.69+8.10 s | 10:27:19.76+14.17 s | 6.07 |
| KLBKalborn | 61.7 | 98 | 10:27:16.25+10.66 s | 10:27:23.84+18.25 s | 7.59 |