SOIGNIES (BE)
Quarry blast17 July 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:04:102020-07-17
- UTC
- 12:04:102020-07-17
Main parameters
| Date and time | 2020-07-17 12:04:10 UTC 2020-07-17 14:04:10 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.591° N, 4.043° E Uncertainty ± 1.2 km |
| Event ID | ROB 10510 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-17 16:07:09 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
- 6.9 – 67.7km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.4km/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 0.46 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)7 stations | |||||
| SKQSteenkerque | 6.9 | 22 | 12:04:12.80+1.83 s | 12:04:14.18+3.21 s | 1.38 |
| RQRRonquières | 13.0 | 83 | 12:04:13.47+2.50 s | – | – |
| BRQBracquegnies | 13.9 | 152 | 12:04:13.36+2.39 s | – | – |
| LESLessines | 19.4 | 313 | 12:04:15.65+4.68 s | 12:04:17.27+6.30 s | 1.62 |
| BOUBougnies | 23.5 | 197 | 12:04:15.18+4.21 s | – | – |
| UCCBUccle | 32.0 | 44 | 12:04:16.36+5.39 s | 12:04:20.18+9.21 s | 3.82 |
| DOUDourbes | 67.7 | 144 | 12:04:23.07+12.10 s | 12:04:31.61+20.64 s | 8.54 |