BRAINE-LE-COMTE (BE)
Quarry blast11 August 2023
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 13:12:382023-08-11
- UTC
- 11:12:382023-08-11
Main parameters
| Date and time | 2023-08-11 11:12:38 UTC 2023-08-11 13:12:38 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.586° N, 4.108° E Uncertainty ± 1.6 km |
| Event ID | ROB 20100 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-08-12 14:59:44 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
- 7.3 – 29.4km
- Mean velocity, P wave
- 6.2km/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 0.05 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 | 7.3 | 344 | 11:12:39.95+1.49 s | 11:12:41.01+2.55 s | 1.06 |
| RQRRonquières | 8.6 | 75 | 11:12:40.23+1.77 s | 11:12:41.56+3.10 s | 1.33 |
| SNFSeneffe | 15.0 | 124 | 11:12:41.11+2.65 s | 11:12:43.72+5.26 s | 2.61 |
| TGATangissart | 29.4 | 86 | 11:12:43.54+5.08 s | – | – |
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