MARCHE-EN-FAMENNE (BE)
Quarry blast17 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:03:002020-09-17
- UTC
- 10:03:002020-09-17
Main parameters
| Date and time | 2020-09-17 10:03:00 UTC 2020-09-17 12:03:00 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.185° N, 5.253° E Uncertainty ± 0.5 km |
| Event ID | ROB 10890 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-17 12:18:08 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
- 3.8 – 61.9km
- Mean velocity, P wave
- 6.1km/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 0.20 s. S wave: 6 measurements, root-mean-square deviation 0.28 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 | 3.8 | 210 | 10:03:01.26+0.64 s | 10:03:02.01+1.39 s | 0.75 |
| GESGesves | 25.2 | 332 | 10:03:05.24+4.62 s | 10:03:08.90+8.28 s | 3.66 |
| CLAClavier | 26.3 | 8 | 10:03:05.38+4.76 s | 10:03:09.12+8.50 s | 3.74 |
| MRDMaredsous | 37.0 | 291 | 10:03:07.01+6.39 s | 10:03:11.96+11.34 s | 4.95 |
| DOUDourbes | 48.1 | 258 | 10:03:08.95+8.33 s | 10:03:15.33+14.71 s | 6.38 |
| LCHLa Chartreuse | 56.2 | 26 | 10:03:10.01+9.39 s | – | – |
| HOUHouvegnez | 56.8 | 70 | 10:03:10.69+10.07 s | – | – |
| KLBKalborn | 61.9 | 98 | 10:03:11.28+10.66 s | 10:03:18.94+18.32 s | 7.66 |