LESSINES (BE)
Quarry blast21 March 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:45:532022-03-21
- UTC
- 12:45:532022-03-21
Main parameters
| Date and time | 2022-03-21 12:45:53 UTC 2022-03-21 13:45:53 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.727° N, 3.870° E Uncertainty ± 62.2 km |
| Event ID | ROB 15690 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-25 10:51:51 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
- 2.6 – 87.2km
- Mean velocity, P wave
- 5.6km/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 0.08 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 | 2.6 | 226 | 12:45:53.79+0.47 s | – | – |
| SKQSteenkerque | 17.2 | 120 | 12:45:56.54+3.22 s | 12:45:58.48+5.16 s | 1.94 |
| RQRRonquières | 28.5 | 118 | 12:45:58.35+5.03 s | – | – |
| BRQBracquegnies | 33.3 | 145 | 12:45:59.41+6.09 s | – | – |
| MRDMaredsous | 79.4 | 126 | 12:46:07.47+14.15 s | 12:46:16.87+23.55 s | 9.40 |
| DOUDourbes | 87.2 | 143 | 12:46:08.90+15.58 s | 12:46:19.28+25.96 s | 10.38 |
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