MARCHE-EN-FAMENNE (BE)
Quarry blast5 February 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:04:412021-02-05
- UTC
- 11:04:412021-02-05
Main parameters
| Date and time | 2021-02-05 11:04:41 UTC 2021-02-05 12:04:41 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.183° N, 5.263° E Uncertainty ± 0.9 km |
| Event ID | ROB 12145 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-05 12:29:03 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
- 8
- Epicentral distance
- 4.0 – 61.2km
- 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: 8 measurements, root-mean-square deviation 0.16 s. S wave: 8 measurements, root-mean-square deviation 0.37 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)8 stations | |||||
| RCHRochefort | 4.0 | 220 | 11:04:42.75+0.79 s | 11:04:43.37+1.41 s | 0.62 |
| GESGesves | 25.8 | 331 | 11:04:46.87+4.91 s | 11:04:50.17+8.21 s | 3.30 |
| CLAClavier | 26.4 | 6 | 11:04:46.75+4.79 s | 11:04:50.63+8.67 s | 3.88 |
| MRDMaredsous | 37.7 | 291 | 11:04:48.59+6.63 s | 11:04:53.39+11.43 s | 4.80 |
| DOUDourbes | 48.8 | 259 | 11:04:50.64+8.68 s | 11:04:56.66+14.70 s | 6.02 |
| LCHLa Chartreuse | 56.1 | 25 | 11:04:52.16+10.20 s | 11:04:58.15+16.19 s | 5.99 |
| HOUHouvegnez | 56.2 | 70 | 11:04:51.95+9.99 s | 11:04:58.22+16.26 s | 6.27 |
| KLBKalborn | 61.2 | 98 | 11:04:52.86+10.90 s | 11:05:00.44+18.48 s | 7.58 |