REBECQ (BE)
Quarry blast14 June 2018
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:18:292018-06-14
- UTC
- 10:18:292018-06-14
Main parameters
| Date and time | 2018-06-14 10:18:29 UTC 2018-06-14 12:18:29 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.654° N, 4.160° E Uncertainty ± 1.0 km |
| Event ID | ROB 6765 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-14 14:42:39 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
- 9
- Epicentral distance
- 5.7 – 151.7km
- Mean velocity, P wave
- 5.8km/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 0.25 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)9 stations | |||||
| SKQSteenkerque | 5.7 | 264 | 10:18:31.04+1.19 s | – | – |
| RQRRonquières | 7.1 | 139 | 10:18:31.44+1.59 s | – | – |
| BRQBracquegnies | 19.3 | 185 | 10:18:32.97+3.12 s | 10:18:35.83+5.98 s | 2.86 |
| UCCSUccle | 21.2 | 42 | 10:18:33.71+3.86 s | – | – |
| LESLessines | 23.3 | 286 | 10:18:34.14+4.29 s | – | – |
| BOUBougnies | 33.2 | 207 | 10:18:36.20+6.35 s | – | – |
| MRDMaredsous | 58.3 | 132 | 10:18:39.80+9.95 s | – | – |
| DOUDourbes | 69.5 | 153 | 10:18:42.12+12.27 s | – | – |
| KLBKalborn | 151.7 | 113 | 10:18:56.05+26.20 s | 10:19:14.44+44.59 s | 18.39 |