LESSINES (BE)
Quarry blast30 June 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:52:422022-06-30
- UTC
- 11:52:422022-06-30
Main parameters
| Date and time | 2022-06-30 11:52:42 UTC 2022-06-30 13:52:42 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.708° N, 3.871° E Uncertainty ± 2.3 km |
| Event ID | ROB 16535 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-04 14:15:20 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
- 6
- Epicentral distance
- 2.0 – 85.4km
- Mean velocity, P wave
- 5.7km/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 0.30 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)6 stations | |||||
| LESLessines | 2.0 | 280 | 11:52:42.75+0.39 s | 11:52:43.06+0.70 s | 0.31 |
| SKQSteenkerque | 16.2 | 114 | 11:52:45.44+3.08 s | 11:52:47.48+5.12 s | 2.04 |
| SNFSeneffe | 36.5 | 127 | 11:52:48.88+6.52 s | 11:52:53.83+11.47 s | 4.95 |
| TGATangissart | 47.4 | 104 | 11:52:50.87+8.51 s | – | – |
| MRDMaredsous | 78.0 | 125 | 11:52:56.71+14.35 s | – | – |
| DOUDourbes | 85.4 | 143 | 11:52:56.99+14.63 s | – | – |
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