LA ROCHE-EN-ARDENNE (BE)
Quarry blast4 October 2017
- Magnitude
- 1.6ML
- Depth
- 4.0km ± 4.3
- Belgian time
- 14:18:402017-10-04
- UTC
- 12:18:402017-10-04
Main parameters
| Date and time | 2017-10-04 12:18:40 UTC 2017-10-04 14:18:40 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.197° N, 5.602° E Uncertainty ± 0.7 km |
| Depth of hypocenter | 4.0 ± 4.3 km |
| Event ID | ROB 5925 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-10-05 12:27:48 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
- 12
- Epicentral distance
- 27.2 – 72.8km
- Mean velocity, P wave
- 6.4km/s
- Mean velocity, S wave
- 3.5km/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 4.0 km. P wave: 12 measurements, root-mean-square deviation 0.62 s. S wave: 10 measurements, root-mean-square deviation 0.34 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)12 stations | ||||||
| RCHRochefort | 27.2 | 260 | 12:18:44.55+4.51 s | 12:18:47.99+7.95 s | 3.44 | – |
| CLAClavier | 32.6 | 319 | 12:18:45.48+5.44 s | 12:18:49.77+9.73 s | 4.29 | 37.7 |
| HOUHouvegnez | 33.6 | 59 | 12:18:45.70+5.66 s | 12:18:49.59+9.55 s | 3.89 | – |
| KLBKalborn | 37.8 | 106 | 12:18:46.75+6.71 s | 12:18:51.07+11.03 s | 4.32 | – |
| GESGesves | 42.2 | 300 | 12:18:47.20+7.16 s | 12:18:52.97+12.93 s | 5.77 | – |
| MRGMont Rigi | 48.5 | 44 | 12:18:48.39+8.35 s | – | – | – |
| LCHLa Chartreuse | 49.1 | 360 | 12:18:48.71+8.67 s | 12:18:55.03+14.99 s | 6.32 | – |
| VIAVianden | 51.9 | 124 | 12:18:49.41+9.37 s | 12:18:55.60+15.56 s | 6.19 | – |
| MEMHMembach | 54.2 | 32 | 12:18:49.47+9.43 s | 12:18:55.58+15.54 s | 6.11 | – |
| MRDMaredsous | 60.6 | 281 | 12:18:49.94+9.90 s | 12:18:57.78+17.74 s | 7.84 | – |
| WLFWalferdange | 71.2 | 146 | 12:18:52.33+12.29 s | – | – | – |
| DOUDourbes | 72.8 | 261 | 12:18:50.21+10.17 s | 12:19:01.39+21.35 s | 11.18 | – |
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