SOIGNIES (BE)
Quarry blast6 July 2023
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:21:202023-07-06
- UTC
- 10:21:202023-07-06
Main parameters
| Date and time | 2023-07-06 10:21:20 UTC 2023-07-06 12:21:20 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.590° N, 4.067° E Uncertainty ± 2.8 km |
| Event ID | ROB 19865 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-07-10 14:28:31 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
- 4
- Epicentral distance
- 6.6 – 17.7km
- Mean velocity, P wave
- 5.3km/s
- Mean velocity, S wave
- 2.9km/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: 4 measurements, root-mean-square deviation 0.16 s. S wave: 4 measurements, root-mean-square deviation 0.25 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)4 stations | |||||
| SKQSteenkerque | 6.6 | 8 | 10:21:21.50+1.36 s | 10:21:22.54+2.40 s | 1.04 |
| RQRRonquières | 11.3 | 81 | 10:21:22.26+2.12 s | 10:21:23.95+3.81 s | 1.69 |
| BRQBracquegnies | 13.0 | 158 | 10:21:22.89+2.75 s | 10:21:24.32+4.18 s | 1.43 |
| SNFSeneffe | 17.7 | 120 | 10:21:23.33+3.19 s | 10:21:26.59+6.45 s | 3.26 |