BRAINE-LE-COMTE (BE)
Quarry blast18 February 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:03:322022-02-18
- UTC
- 13:03:322022-02-18
Main parameters
| Date and time | 2022-02-18 13:03:32 UTC 2022-02-18 14:03:32 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.621° N, 4.219° E Uncertainty ± 1.9 km |
| Event ID | ROB 15495 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-25 18:35:59 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
- 1.7 – 21.5km
- Mean velocity, P wave
- 6.0km/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 0.47 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 | |||||
| RQRRonquières | 1.7 | 165 | 13:03:33.63+1.32 s | – | – |
| SKQSteenkerque | 10.3 | 288 | 13:03:34.21+1.90 s | 13:03:35.90+3.59 s | 1.69 |
| SNFSeneffe | 13.1 | 159 | 13:03:34.79+2.48 s | 13:03:36.56+4.25 s | 1.77 |
| BRQBracquegnies | 16.6 | 201 | 13:03:35.23+2.92 s | – | – |
| TGATangissart | 21.5 | 95 | 13:03:37.16+4.85 s | 13:03:38.82+6.51 s | 1.66 |
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