Foisches (FR)
Quarry blast13 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 11:34:442020-03-13
- UTC
- 10:34:442020-03-13
Main parameters
| Date and time | 2020-03-13 10:34:44 UTC 2020-03-13 11:34:44 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.125° N, 4.785° E Uncertainty ± 0.5 km |
| Event ID | ROB 9470 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-13 12:59:10 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
- 5
- Epicentral distance
- 14.0 – 49.3km
- 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: 5 measurements, root-mean-square deviation 0.15 s. S wave: 4 measurements, root-mean-square deviation 0.15 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)5 stations | |||||
| DOUDourbes | 14.0 | 256 | 10:34:47.33+2.81 s | 10:34:49.20+4.68 s | 1.87 |
| MRDMaredsous | 19.7 | 357 | 10:34:48.26+3.74 s | 10:34:50.99+6.47 s | 2.73 |
| RCHRochefort | 31.8 | 84 | 10:34:50.37+5.85 s | 10:34:54.33+9.81 s | 3.96 |
| GESGesves | 36.1 | 37 | 10:34:50.91+6.39 s | 10:34:55.37+10.85 s | 4.46 |
| CLAClavier | 49.3 | 48 | 10:34:53.58+9.06 s | – | – |