SOIGNIES (BE)
Quarry blast14 June 2018
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:00:552018-06-14
- UTC
- 12:00:552018-06-14
Main parameters
| Date and time | 2018-06-14 12:00:55 UTC 2018-06-14 14:00:55 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.581° N, 4.019° E Uncertainty ± 3.3 km |
| Event ID | ROB 6770 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-14 14:42:51 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
- 10
- Epicentral distance
- 8.7 – 102.8km
- Mean velocity, P wave
- 5.9km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 10 measurements, root-mean-square deviation 0.37 s. S wave: 4 measurements, root-mean-square deviation 0.50 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)10 stations | |||||
| SKQSteenkerque | 8.7 | 30 | 12:00:56.81+1.75 s | 12:00:57.92+2.86 s | 1.11 |
| BRQBracquegnies | 13.9 | 143 | 12:00:57.42+2.36 s | – | – |
| RQRRonquières | 14.8 | 79 | 12:00:57.43+2.37 s | 12:00:59.19+4.13 s | 1.76 |
| LESLessines | 19.1 | 319 | 12:00:58.74+3.68 s | – | – |
| BOUBougnies | 22.0 | 194 | 12:00:58.96+3.90 s | – | – |
| UCCSUccle | 34.0 | 45 | 12:00:59.92+4.86 s | – | – |
| MRDMaredsous | 61.6 | 120 | 12:01:05.63+10.57 s | 12:01:12.27+17.21 s | 6.64 |
| DOUDourbes | 67.8 | 143 | 12:01:07.02+11.96 s | 12:01:15.41+20.35 s | 8.39 |
| CLAClavier | 92.8 | 101 | 12:01:10.77+15.71 s | – | – |
| MOLSMol | 102.8 | 46 | 12:01:12.38+17.32 s | – | – |