BRAINE-LE-COMTE (BE)
Quarry blast13 June 2018
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:03:402018-06-13
- UTC
- 12:03:402018-06-13
Main parameters
| Date and time | 2018-06-13 12:03:40 UTC 2018-06-13 14:03:40 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.613° N, 4.120° E Uncertainty ± 1.0 km |
| Event ID | ROB 6745 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-14 09:48:45 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
- 4.9 – 73.1km
- Mean velocity, P wave
- 5.9km/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 0.54 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 | |||||
| SKQSteenkerque | 4.9 | 324 | 12:03:41.51+0.98 s | 12:03:42.79+2.26 s | 1.28 |
| RQRRonquières | 7.4 | 96 | 12:03:42.06+1.53 s | – | – |
| BRQBracquegnies | 14.8 | 176 | 12:03:41.78+1.25 s | – | – |
| UCCSUccle | 26.5 | 40 | 12:03:45.40+4.87 s | – | – |
| BOUBougnies | 27.9 | 207 | 12:03:45.71+5.18 s | – | – |
| DOUDourbes | 66.8 | 149 | 12:03:51.81+11.28 s | 12:03:58.88+18.35 s | 7.07 |
| GESGesves | 73.1 | 110 | 12:03:52.88+12.35 s | – | – |
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