FOISCHES (FR)
Quarry blast15 June 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:21:132020-06-15
- UTC
- 10:21:132020-06-15
Main parameters
| Date and time | 2020-06-15 10:21:13 UTC 2020-06-15 12:21:13 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.105° N, 4.783° E Uncertainty ± 1.3 km |
| Event ID | ROB 10275 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-15 14:01:22 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
- 13.5 – 62.3km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.2km/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 0.17 s. S wave: 4 measurements, root-mean-square deviation 0.30 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 | 13.5 | 265 | 10:21:15.84+2.59 s | 10:21:17.97+4.72 s | 2.13 |
| MRDMaredsous | 21.9 | 357 | 10:21:16.92+3.67 s | 10:21:19.87+6.62 s | 2.95 |
| RCHRochefort | 32.2 | 80 | 10:21:18.92+5.67 s | 10:21:23.28+10.03 s | 4.36 |
| GESGesves | 37.9 | 35 | 10:21:20.19+6.94 s | 10:21:25.47+12.22 s | 5.28 |
| BRQBracquegnies | 62.3 | 312 | 10:21:24.14+10.89 s | – | – |