BRAINE-LE-COMTE (BE)
Quarry blast28 June 2023
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 13:00:052023-06-28
- UTC
- 11:00:052023-06-28
Main parameters
| Date and time | 2023-06-28 11:00:05 UTC 2023-06-28 13:00:05 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.623° N, 4.143° E Uncertainty ± 1.6 km |
| Event ID | ROB 19750 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-06-29 23:57:15 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
- 7
- Epicentral distance
- 5.3 – 34.4km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.5km/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: 7 measurements, root-mean-square deviation 0.34 s. S wave: 5 measurements, root-mean-square deviation 0.39 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)7 stations | |||||
| SKQSteenkerque | 5.3 | 303 | 11:00:07.22+1.26 s | 11:00:08.42+2.46 s | 1.20 |
| RQRRonquières | 6.1 | 108 | 11:00:07.50+1.54 s | 11:00:08.75+2.79 s | 1.25 |
| BRQBracquegnies | 15.8 | 182 | 11:00:09.59+3.63 s | – | – |
| SNFSeneffe | 16.0 | 141 | 11:00:08.46+2.50 s | 11:00:10.67+4.71 s | 2.21 |
| LESLessines | 23.4 | 295 | 11:00:10.36+4.40 s | 11:00:12.93+6.97 s | 2.57 |
| TGATangissart | 26.9 | 94 | 11:00:10.88+4.92 s | – | – |
| BLRGBlaregnies | 34.4 | 210 | 11:00:12.48+6.52 s | 11:00:16.75+10.79 s | 4.27 |