LESSINES (BE)
Quarry blast13 February 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 16:17:262020-02-13
- UTC
- 15:17:262020-02-13
Main parameters
| Date and time | 2020-02-13 15:17:26 UTC 2020-02-13 16:17:26 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.700° N, 3.841° E Uncertainty ± 6.2 km |
| Event ID | ROB 9285 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-14 09:22:29 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
- 8
- Epicentral distance
- 1.3 – 108.1km
- Mean velocity, P wave
- 5.4km/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: 8 measurements, root-mean-square deviation 0.43 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)8 stations | |||||
| LESLessines | 1.3 | 6 | 15:17:27.05+0.23 s | 15:17:27.25+0.43 s | 0.20 |
| SKQSteenkerque | 17.8 | 108 | 15:17:30.12+3.30 s | 15:17:32.20+5.38 s | 2.08 |
| RQRRonquières | 29.1 | 111 | 15:17:32.25+5.43 s | – | – |
| BRQBracquegnies | 32.1 | 139 | 15:17:33.13+6.31 s | – | – |
| BOUBougnies | 35.3 | 168 | 15:17:32.46+5.64 s | – | – |
| TGATangissart | 49.3 | 102 | 15:17:35.32+8.50 s | – | – |
| DOUDourbes | 86.0 | 141 | 15:17:42.13+15.31 s | – | – |
| CLAClavier | 108.1 | 106 | 15:17:47.07+20.25 s | – | – |
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