LESSINES (BE)
Quarry blast3 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:40:402020-03-03
- UTC
- 11:40:402020-03-03
Main parameters
| Date and time | 2020-03-03 11:40:40 UTC 2020-03-03 12:40:40 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.711° N, 3.877° E Uncertainty ± 0.5 km |
| Event ID | ROB 9455 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-12 13:08:40 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
- 2.4 – 47.1km
- Mean velocity, P wave
- 5.8km/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 0.14 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 | 2.4 | 269 | 11:40:41.05+0.59 s | 11:40:41.17+0.71 s | 0.12 |
| SKQSteenkerque | 15.9 | 116 | 11:40:43.68+3.22 s | 11:40:45.50+5.04 s | 1.82 |
| RQRRonquières | 27.2 | 115 | 11:40:45.50+5.04 s | – | – |
| BRQBracquegnies | 31.5 | 144 | 11:40:45.96+5.50 s | – | – |
| UCCBUccle | 35.4 | 74 | 11:40:46.98+6.52 s | 11:40:51.16+10.70 s | 4.18 |
| TGATangissart | 47.1 | 104 | 11:40:48.89+8.43 s | – | – |
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