BOIS-DE-VILLERS (BE)
Quarry blast14 February 2018
- Magnitude
- 1.2ML
- Depth
- 5.8km ± 5.5
- Belgian time
- 12:42:052018-02-14
- UTC
- 11:42:052018-02-14
Main parameters
| Date and time | 2018-02-14 11:42:05 UTC 2018-02-14 12:42:05 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.392° N, 4.834° E Uncertainty ± 5.4 km |
| Depth of hypocenter | 5.8 ± 5.5 km |
| Event ID | ROB 6305 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-02-14 12:57:57 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
- 11.0 – 37.2km
- 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. Hypocenter at a depth of 5.8 km. P wave: 4 measurements, root-mean-square deviation 0.24 s. S wave: 4 measurements, root-mean-square deviation 0.09 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)4 stations | ||||||
| MRDMaredsous | 11.0 | 205 | 11:42:07.92+2.20 s | 11:42:09.54+3.82 s | 1.62 | – |
| GESGesves | 18.0 | 92 | 11:42:08.67+2.95 s | 11:42:11.36+5.64 s | 2.69 | – |
| CLAClavier | 33.4 | 85 | 11:42:11.79+6.07 s | 11:42:16.27+10.55 s | 4.48 | 11.9 |
| DOUDourbes | 37.2 | 207 | 11:42:11.87+6.15 s | 11:42:17.43+11.71 s | 5.56 | – |
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