LESSINES (BE)
Quarry blast13 April 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:40:592022-04-13
- UTC
- 10:40:592022-04-13
Main parameters
| Date and time | 2022-04-13 10:40:59 UTC 2022-04-13 12:40:59 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.718° N, 3.876° E Uncertainty ± 4.2 km |
| Event ID | ROB 15955 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-14 09:28:29 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
- 4
- Epicentral distance
- 2.5 – 36.9km
- 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: 4 measurements, root-mean-square deviation 0.07 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)4 stations | |||||
| LESLessines | 2.5 | 253 | 10:41:00.30+0.56 s | 10:41:00.50+0.76 s | 0.20 |
| SKQSteenkerque | 16.3 | 118 | 10:41:02.89+3.15 s | 10:41:04.67+4.93 s | 1.78 |
| RQRRonquières | 27.6 | 117 | 10:41:04.68+4.94 s | – | – |
| SNFSeneffe | 36.9 | 128 | 10:41:06.40+6.66 s | 10:41:11.29+11.55 s | 4.89 |
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