BRAINE-LE-COMTE (BE)
Quarry blast13 July 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:31:212022-07-13
- UTC
- 10:31:212022-07-13
Main parameters
| Date and time | 2022-07-13 10:31:21 UTC 2022-07-13 12:31:21 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.624° N, 4.103° E Uncertainty ± 7.0 km |
| Event ID | ROB 16660 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-22 11:07:30 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
- 3.2 – 154.2km
- Mean velocity, P wave
- 5.8km/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: 6 measurements, root-mean-square deviation 0.14 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | 3.2 | 330 | 10:31:22.14+0.59 s | – | – |
| SNFSeneffe | 18.0 | 134 | 10:31:24.56+3.01 s | – | – |
| TGATangissart | 29.8 | 94 | 10:31:27.07+5.52 s | – | – |
| DOUDourbes | 68.5 | 149 | 10:31:33.47+11.92 s | – | – |
| GESGesves | 74.8 | 110 | 10:31:34.56+13.01 s | – | – |
| CLAClavier | 88.1 | 105 | 10:31:36.85+15.30 s | – | – |
| KLBKalborn | 154.2 | 111 | 10:31:46.54+24.99 s | – | – |