FOISCHES (FR)
Quarry blast23 April 2018
- Magnitude
- 1.3ML
- Depth
- 5.0km ± 14.5
- Belgian time
- 11:27:282018-04-23
- UTC
- 09:27:282018-04-23
Main parameters
| Date and time | 2018-04-23 09:27:28 UTC 2018-04-23 11:27:28 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.202° N, 4.783° E Uncertainty ± 4.3 km |
| Depth of hypocenter | 5.0 ± 14.5 km |
| Event ID | ROB 6510 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-04-24 09:32:06 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
- 11.2 – 75.7km
- Mean velocity, P wave
- 6.2km/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. Hypocenter at a depth of 5.0 km. P wave: 5 measurements, root-mean-square deviation 0.12 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 | |||||
| MRDMaredsous | 11.2 | 355 | 09:27:30.43+2.20 s | 09:27:31.98+3.75 s | 1.55 |
| DOUDourbes | 17.9 | 229 | 09:27:31.51+3.28 s | 09:27:34.12+5.89 s | 2.61 |
| GESGesves | 29.8 | 47 | 09:27:33.37+5.14 s | – | – |
| CLAClavier | 44.2 | 57 | 09:27:35.94+7.71 s | – | – |
| LCHLa Chartreuse | 75.7 | 50 | 09:27:40.66+12.43 s | – | – |
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