LESSINES (BE)
Quarry blast17 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:46:532020-03-17
- UTC
- 11:46:532020-03-17
Main parameters
| Date and time | 2020-03-17 11:46:53 UTC 2020-03-17 12:46:53 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.713° N, 3.873° E Uncertainty ± 11.4 km |
| Event ID | ROB 9590 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-24 15:30:43 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
- 2.2 – 93.4km
- 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 0.20 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 | 2.2 | 264 | 11:46:53.95+0.39 s | 11:46:54.31+0.75 s | 0.36 |
| SKQSteenkerque | 16.2 | 116 | 11:46:56.56+3.00 s | 11:46:58.41+4.85 s | 1.85 |
| RQRRonquières | 27.6 | 115 | 11:46:58.63+5.07 s | – | – |
| TGATangissart | 47.4 | 104 | 11:47:01.88+8.32 s | – | – |
| MRDMaredsous | 78.2 | 125 | 11:47:07.82+14.26 s | – | – |
| GESGesves | 93.4 | 113 | 11:47:09.89+16.33 s | – | – |
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