LESSINES (BE)
Quarry blast4 February 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 15:08:422020-02-04
- UTC
- 14:08:422020-02-04
Main parameters
| Date and time | 2020-02-04 14:08:42 UTC 2020-02-04 15:08:42 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.728° N, 3.845° E Uncertainty ± 14.4 km |
| Event ID | ROB 9245 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-04 15:15:59 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
- 9
- Epicentral distance
- 1.9 – 108.8km
- 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: 9 measurements, root-mean-square deviation 0.23 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)9 stations | |||||
| LESLessines | 1.9 | 184 | 14:08:43.32+0.33 s | 14:08:43.51+0.52 s | 0.19 |
| SKQSteenkerque | 18.8 | 118 | 14:08:46.02+3.03 s | – | – |
| RQRRonquières | 30.1 | 117 | 14:08:47.78+4.79 s | – | – |
| BRQBracquegnies | 34.3 | 143 | 14:08:48.72+5.73 s | – | – |
| UCCSUccle | 37.2 | 78 | 14:08:49.64+6.65 s | – | – |
| TGATangissart | 49.8 | 106 | 14:08:51.34+8.35 s | – | – |
| DOUDourbes | 88.3 | 143 | 14:08:58.91+15.92 s | – | – |
| GESGesves | 95.9 | 113 | 14:08:59.99+17.00 s | – | – |
| CLAClavier | 108.8 | 108 | 14:09:02.35+19.36 s | – | – |
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