ROCHEFORT (BE)
Quarry blast6 June 2018
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:22:062018-06-06
- UTC
- 10:22:062018-06-06
Main parameters
| Date and time | 2018-06-06 10:22:06 UTC 2018-06-06 12:22:06 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.184° N, 5.235° E Uncertainty ± 0.8 km |
| Event ID | ROB 6710 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-07 16:28:18 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
- 8
- Epicentral distance
- 24.7 – 97.0km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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: 8 measurements, root-mean-square deviation 0.39 s. S wave: 4 measurements, root-mean-square deviation 0.25 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)8 stations | |||||
| GESGesves | 24.7 | 335 | 10:22:11.59+4.68 s | 10:22:15.00+8.09 s | 3.41 |
| CLAClavier | 26.6 | 10 | 10:22:11.73+4.82 s | 10:22:15.22+8.31 s | 3.49 |
| MRDMaredsous | 35.8 | 292 | 10:22:13.25+6.34 s | 10:22:17.95+11.04 s | 4.70 |
| DOUDourbes | 46.8 | 258 | 10:22:15.19+8.28 s | 10:22:21.07+14.16 s | 5.88 |
| KLBKalborn | 63.2 | 98 | 10:22:17.62+10.71 s | – | – |
| MEMSMembach | 72.6 | 49 | 10:22:19.28+12.37 s | – | – |
| WLFWalferdange | 87.6 | 131 | 10:22:22.41+15.50 s | – | – |
| SKQSteenkerque | 97.0 | 303 | 10:22:24.87+17.96 s | – | – |