LESSINES (BE)
Quarry blast10 March 2020
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:40:122020-03-10
- UTC
- 11:40:122020-03-10
Main parameters
| Date and time | 2020-03-10 11:40:12 UTC 2020-03-10 12:40:12 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.700° N, 3.870° E Uncertainty ± 1.3 km |
| Event ID | ROB 9450 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-12 13:07:36 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
- 5
- Epicentral distance
- 2.3 – 35.0km
- 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: 5 measurements, root-mean-square deviation 0.16 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)5 stations | |||||
| LESLessines | 2.3 | 302 | 11:40:13.22+0.47 s | 11:40:13.48+0.73 s | 0.26 |
| SKQSteenkerque | 15.9 | 111 | 11:40:15.95+3.20 s | 11:40:17.81+5.06 s | 1.86 |
| RQRRonquières | 27.2 | 113 | 11:40:17.89+5.14 s | – | – |
| BRQBracquegnies | 30.8 | 142 | 11:40:18.19+5.44 s | – | – |
| BOUBougnies | 35.0 | 171 | 11:40:19.02+6.27 s | – | – |
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