SOIGNIES (BE)
Quarry blast3 July 2023
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:04:152023-07-03
- UTC
- 10:04:152023-07-03
Main parameters
| Date and time | 2023-07-03 10:04:15 UTC 2023-07-03 12:04:15 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.588° N, 4.077° E Uncertainty ± 1.4 km |
| Event ID | ROB 19805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-07-10 12:14:36 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
- 5
- Epicentral distance
- 6.8 – 31.5km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.0km/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 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.23 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)5 stations | |||||
| SKQSteenkerque | 6.8 | 1 | 10:04:16.64+1.15 s | 10:04:18.08+2.59 s | 1.44 |
| RQRRonquières | 10.6 | 79 | 10:04:17.48+1.99 s | 10:04:19.22+3.73 s | 1.74 |
| BRQBracquegnies | 12.6 | 161 | 10:04:18.19+2.70 s | 10:04:19.66+4.17 s | 1.47 |
| SNFSeneffe | 17.0 | 120 | 10:04:18.56+3.07 s | 10:04:21.77+6.28 s | 3.21 |
| TGATangissart | 31.5 | 86 | 10:04:20.80+5.31 s | – | – |