BRAINE-LE-COMTE (BE)
Quarry blast23 February 2022
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 12:55:292022-02-23
- UTC
- 11:55:292022-02-23
Main parameters
| Date and time | 2022-02-23 11:55:29 UTC 2022-02-23 12:55:29 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.631° N, 4.137° E Uncertainty ± 1.1 km |
| Event ID | ROB 15510 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-25 18:37:16 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
- 4.5 – 72.7km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.4km/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 0.35 s. S wave: 4 measurements, root-mean-square deviation 0.26 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 | 4.5 | 296 | 11:55:30.62+0.75 s | 11:55:31.52+1.65 s | 0.90 |
| RQRRonquières | 6.8 | 114 | 11:55:31.59+1.72 s | – | – |
| BRQBracquegnies | 16.7 | 180 | 11:55:32.96+3.09 s | – | – |
| SNFSeneffe | 16.9 | 142 | 11:55:32.67+2.80 s | 11:55:35.71+5.84 s | 3.04 |
| TGATangissart | 27.4 | 96 | 11:55:34.91+5.04 s | 11:55:38.50+8.63 s | 3.59 |
| DOUDourbes | 68.0 | 151 | 11:55:42.01+12.14 s | 11:55:50.10+20.23 s | 8.09 |
| GESGesves | 72.7 | 112 | 11:55:41.82+11.95 s | – | – |