ARBRE (NAMUR) (BE)
Quarry blast2 October 2017
- Magnitude
- 1.4ML
- Depth
- 6.5km ± 4.9
- Belgian time
- 14:30:152017-10-02
- UTC
- 12:30:152017-10-02
Main parameters
| Date and time | 2017-10-02 12:30:15 UTC 2017-10-02 14:30:15 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.368° N, 4.845° E Uncertainty ± 5.6 km |
| Depth of hypocenter | 6.5 ± 4.9 km |
| Event ID | ROB 5920 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-10-02 14:49:13 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
- 9.2 – 36.1km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.1km/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 6.5 km. P wave: 5 measurements, root-mean-square deviation 0.28 s. S wave: 4 measurements, root-mean-square deviation 0.18 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)5 stations | ||||||
| MRDMaredsous | 9.2 | 217 | 12:30:17.01+1.70 s | 12:30:18.43+3.12 s | 1.42 | – |
| GESGesves | 17.3 | 84 | 12:30:17.99+2.68 s | 12:30:21.10+5.79 s | 3.11 | – |
| CLAClavier | 33.0 | 80 | 12:30:21.11+5.80 s | 12:30:25.88+10.57 s | 4.77 | 21.5 |
| DOUDourbes | 35.2 | 211 | 12:30:21.63+6.32 s | 12:30:26.24+10.93 s | 4.61 | – |
| RCHRochefort | 36.1 | 131 | 12:30:21.01+5.70 s | – | – | – |
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