SOIGNIES (BE)
Quarry blast2 August 2023
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 12:00:042023-08-02
- UTC
- 10:00:042023-08-02
Main parameters
| Date and time | 2023-08-02 10:00:04 UTC 2023-08-02 12:00:04 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.588° N, 4.036° E Uncertainty ± 10.7 km |
| Event ID | ROB 19955 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-08-02 16:00:19 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
- 7.4 – 19.5km
- 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: 4 measurements, root-mean-square deviation 0.03 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 | 7.4 | 25 | 10:00:05.53+1.40 s | 10:00:06.90+2.77 s | 1.37 |
| RQRRonquières | 13.5 | 81 | 10:00:06.60+2.47 s | 10:00:08.68+4.55 s | 2.08 |
| BRQBracquegnies | 13.9 | 149 | 10:00:06.75+2.62 s | 10:00:09.22+5.09 s | 2.47 |
| SNFSeneffe | 19.5 | 116 | 10:00:07.69+3.56 s | – | – |
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