SOIGNIES (BE)
Quarry blast6 September 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:07:202019-09-06
- UTC
- 12:07:202019-09-06
Main parameters
| Date and time | 2019-09-06 12:07:20 UTC 2019-09-06 14:07:20 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.595° N, 4.075° E Uncertainty ± 2.0 km |
| Event ID | ROB 8630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-06 14:19:01 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
- 6
- Epicentral distance
- 6.0 – 154.9km
- 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: 5 measurements, root-mean-square deviation 0.15 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)6 stations | |||||
| SKQSteenkerque | 6.0 | 3 | 12:07:21.18+1.11 s | 12:07:22.16+2.09 s | 0.98 |
| RQRRonquières | 10.7 | 83 | 12:07:21.97+1.90 s | – | – |
| BRQBracquegnies | 13.4 | 161 | 12:07:22.19+2.12 s | – | – |
| MRDMaredsous | 59.0 | 123 | 12:07:30.28+10.21 s | 12:07:37.65+17.58 s | 7.37 |
| DOUDourbes | 66.8 | 146 | 12:07:32.01+11.94 s | 12:07:40.07+20.00 s | 8.06 |
| KLBKalborn | 154.9 | 110 | 12:07:46.66+26.59 s | – | – |