MARCHE-EN-FAMENNE (BE)
Quarry blast19 August 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:13:592020-08-19
- UTC
- 10:13:592020-08-19
Main parameters
| Date and time | 2020-08-19 10:13:59 UTC 2020-08-19 12:13:59 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.188° N, 5.258° E Uncertainty ± 0.7 km |
| Event ID | ROB 10720 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-21 11:07:53 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
- 7
- Epicentral distance
- 4.3 – 61.6km
- 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: 7 measurements, root-mean-square deviation 0.22 s. S wave: 7 measurements, root-mean-square deviation 0.20 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)7 stations | |||||
| RCHRochefort | 4.3 | 211 | 10:14:00.28+0.68 s | 10:14:01.39+1.79 s | 1.11 |
| GESGesves | 25.1 | 331 | 10:14:04.20+4.60 s | 10:14:07.27+7.67 s | 3.07 |
| CLAClavier | 25.8 | 7 | 10:14:04.48+4.88 s | 10:14:08.06+8.46 s | 3.58 |
| MRDMaredsous | 37.2 | 290 | 10:14:05.97+6.37 s | 10:14:10.80+11.20 s | 4.83 |
| DOUDourbes | 48.6 | 258 | 10:14:08.00+8.40 s | 10:14:14.20+14.60 s | 6.20 |
| HOUHouvegnez | 56.3 | 71 | 10:14:09.14+9.54 s | 10:14:16.53+16.93 s | 7.39 |
| KLBKalborn | 61.6 | 99 | 10:14:10.40+10.80 s | 10:14:17.97+18.37 s | 7.57 |