LESSINES (BE)
Quarry blast28 September 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:33:412022-09-28
- UTC
- 11:33:412022-09-28
Main parameters
| Date and time | 2022-09-28 11:33:41 UTC 2022-09-28 13:33:41 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.699° N, 3.853° E Uncertainty ± 8.0 km |
| Event ID | ROB 17470 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-27 12:51:04 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
- 1.5 – 94.2km
- Mean velocity, P wave
- 5.1km/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 0.27 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 | 1.5 | 333 | 11:33:41.39+0.30 s | 11:33:41.61+0.52 s | 0.22 |
| SKQSteenkerque | 17.0 | 109 | 11:33:44.08+2.99 s | 11:33:46.21+5.12 s | 2.13 |
| RQRRonquières | 28.3 | 111 | 11:33:46.31+5.22 s | – | – |
| SNFSeneffe | 37.0 | 124 | 11:33:47.49+6.40 s | 11:33:52.47+11.38 s | 4.98 |
| TGATangissart | 48.5 | 102 | 11:33:50.27+9.18 s | – | – |
| GESGesves | 94.2 | 111 | 11:33:59.49+18.40 s | – | – |
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