REBECQ (BE)
Quarry blast27 April 2017
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:07:452017-04-27
- UTC
- 10:07:452017-04-27
Main parameters
| Date and time | 2017-04-27 10:07:45 UTC 2017-04-27 12:07:45 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.656° N, 4.165° E Uncertainty ± 3.9 km |
| Event ID | ROB 5680 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-04-27 13:07:07 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
- 15
- Epicentral distance
- 6.1 – 234.4km
- Mean velocity, P wave
- 5.6km/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: 10 measurements, root-mean-square deviation 0.32 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)13 stations | |||||
| SKQSteenkerque | 6.1 | 263 | 10:07:46.10+0.67 s | 10:07:46.87+1.44 s | 0.77 |
| RQRRonquières | 7.0 | 143 | 10:07:46.36+0.93 s | – | – |
| SNFSeneffe | 18.2 | 152 | 10:07:48.48+3.05 s | – | – |
| BRQBracquegnies | 19.6 | 186 | 10:07:49.14+3.71 s | – | – |
| UCCSUccle | 20.9 | 41 | 10:07:48.77+3.34 s | 10:07:50.99+5.56 s | 2.22 |
| LESLessines | 23.6 | 285 | 10:07:48.57+3.14 s | – | – |
| MRDMaredsous | 58.1 | 132 | 10:07:55.29+9.86 s | – | – |
| DOUDourbes | 69.5 | 154 | 10:07:57.64+12.21 s | – | – |
| CLAClavier | 84.8 | 108 | 10:07:59.92+14.49 s | – | – |
| MOLSMol | 89.6 | 46 | 10:08:01.14+15.71 s | – | – |
| MEMSMembach | 130.6 | 92 | 10:08:07.72+22.29 s | – | – |
| MEMHMembach | 130.6 | 92 | 10:08:07.80+22.37 s | 10:08:23.61+38.18 s | 15.81 |
| HOUHouvegnez | 134.8 | 104 | 10:08:08.12+22.69 s | – | – |
| Network BUG1 station | |||||
| BUGBochum | 234.4 | 67 | 10:08:21.14+35.71 s | – | – |
| Network STR1 station | |||||
| MENFMencas | 142.7 | 266 | 10:08:09.55+24.12 s | – | – |