BRAINE-LE-COMTE (BE)
Quarry blast8 June 2018
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:02:132018-06-08
- UTC
- 12:02:132018-06-08
Main parameters
| Date and time | 2018-06-08 12:02:13 UTC 2018-06-08 14:02:13 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.655° N, 4.180° E Uncertainty ± 3.7 km |
| Event ID | ROB 6740 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-14 09:48:27 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
- 7
- Epicentral distance
- 6.3 – 68.9km
- Mean velocity, P wave
- 7.1km/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: 7 measurements, root-mean-square deviation 1.04 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)7 stations | |||||
| RQRRonquières | 6.3 | 149 | 12:02:15.64+2.42 s | – | – |
| SKQSteenkerque | 7.1 | 265 | 12:02:14.89+1.67 s | 12:02:16.18+2.96 s | 1.29 |
| BRQBracquegnies | 19.6 | 189 | 12:02:15.54+2.32 s | – | – |
| UCCSUccle | 20.3 | 39 | 12:02:16.76+3.54 s | – | – |
| BOUBougnies | 33.9 | 209 | 12:02:19.57+6.35 s | – | – |
| MRDMaredsous | 57.3 | 133 | 12:02:20.21+6.99 s | 12:02:31.52+18.30 s | 11.31 |
| DOUDourbes | 68.9 | 154 | 12:02:24.94+11.72 s | 12:02:33.22+20.00 s | 8.28 |
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