LESSINES (BE)
Quarry blast9 September 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:54:492022-09-09
- UTC
- 11:54:492022-09-09
Main parameters
| Date and time | 2022-09-09 11:54:49 UTC 2022-09-09 13:54:49 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.730° N, 3.868° E Uncertainty ± 43.8 km |
| Event ID | ROB 17080 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-09-09 14:29:04 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
- 2.7 – 87.5km
- 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: 6 measurements, root-mean-square deviation 0.13 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 | 2.7 | 220 | 11:54:49.87+0.60 s | 11:54:50.15+0.88 s | 0.28 |
| SKQSteenkerque | 17.5 | 121 | 11:54:52.58+3.31 s | 11:54:54.79+5.52 s | 2.21 |
| RQRRonquières | 28.7 | 118 | 11:54:54.31+5.04 s | – | – |
| BRQBracquegnies | 33.5 | 145 | 11:54:55.43+6.16 s | – | – |
| SNFSeneffe | 38.2 | 129 | 11:54:56.05+6.78 s | – | – |
| DOUDourbes | 87.5 | 144 | 11:55:05.22+15.95 s | – | – |
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