FOISCHES (FR)
Quarry blast17 April 2018
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:15:532018-04-17
- UTC
- 10:15:532018-04-17
Main parameters
| Date and time | 2018-04-17 10:15:53 UTC 2018-04-17 12:15:53 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.127° N, 4.763° E Uncertainty ± 1.6 km |
| Event ID | ROB 6495 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-04-17 17:44:31 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
- 12.5 – 50.3km
- Mean velocity, P wave
- 5.9km/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 0.08 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 | 12.5 | 254 | 10:15:55.65+2.45 s | 10:15:57.52+4.32 s | 1.87 |
| MRDMaredsous | 19.5 | 1 | 10:15:57.04+3.84 s | 10:15:59.56+6.36 s | 2.52 |
| GESGesves | 36.9 | 39 | 10:15:59.81+6.61 s | 10:16:04.10+10.90 s | 4.29 |
| CLAClavier | 50.3 | 50 | 10:16:02.20+9.00 s | – | – |
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