FOISCHES (FR)
Quarry blast16 July 2019
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:08:382019-07-16
- UTC
- 12:08:382019-07-16
Main parameters
| Date and time | 2019-07-16 12:08:38 UTC 2019-07-16 14:08:38 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.122° N, 4.790° E Uncertainty ± 1.1 km |
| Event ID | ROB 8385 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-16 14:19:36 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
- 4
- Epicentral distance
- 14.3 – 36.1km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 4 measurements, root-mean-square deviation 0.14 s. S wave: 4 measurements, root-mean-square deviation 0.26 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)4 stations | |||||
| DOUDourbes | 14.3 | 258 | 12:08:40.89+2.80 s | 12:08:42.98+4.89 s | 2.09 |
| MRDMaredsous | 20.1 | 356 | 12:08:42.01+3.92 s | 12:08:44.11+6.02 s | 2.10 |
| RCHRochefort | 31.5 | 83 | 12:08:43.56+5.47 s | 12:08:47.88+9.79 s | 4.32 |
| GESGesves | 36.1 | 36 | 12:08:44.63+6.54 s | 12:08:49.60+11.51 s | 4.97 |