LESSINES (BE)
Quarry blast13 July 2022
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:40:452022-07-13
- UTC
- 10:40:452022-07-13
Main parameters
| Date and time | 2022-07-13 10:40:45 UTC 2022-07-13 12:40:45 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.705° N, 3.856° E Uncertainty ± 4.0 km |
| Event ID | ROB 16590 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-21 23:34:58 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
- 10
- Epicentral distance
- 1.2 – 115.0km
- Mean velocity, P wave
- 5.5km/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: 10 measurements, root-mean-square deviation 0.57 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)10 stations | |||||
| LESLessines | 1.2 | 309 | 10:40:45.94+0.19 s | 10:40:46.18+0.43 s | 0.24 |
| SKQSteenkerque | 17.0 | 111 | 10:40:48.58+2.83 s | 10:40:51.26+5.51 s | 2.68 |
| RQRRonquières | 28.3 | 113 | 10:40:50.45+4.70 s | – | – |
| BRQBracquegnies | 31.8 | 141 | 10:40:51.65+5.90 s | – | – |
| SNFSeneffe | 37.2 | 125 | 10:40:52.14+6.39 s | 10:40:57.30+11.55 s | 5.16 |
| MRDMaredsous | 78.7 | 124 | 10:41:00.09+14.34 s | – | – |
| DOUDourbes | 85.8 | 142 | 10:41:00.16+14.41 s | – | – |
| GESGesves | 94.2 | 112 | 10:41:03.97+18.22 s | – | – |
| CLAClavier | 107.3 | 107 | 10:41:04.48+18.73 s | – | – |
| RCHRochefort | 115.0 | 122 | 10:41:06.20+20.45 s | – | – |
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