LESSINES (BE)
Quarry blast18 June 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 12:41:362020-06-18
- UTC
- 10:41:362020-06-18
Main parameters
| Date and time | 2020-06-18 10:41:36 UTC 2020-06-18 12:41:36 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.697° N, 3.871° E Uncertainty ± 2.8 km |
| Event ID | ROB 10300 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-18 13:11:24 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
- 4
- Epicentral distance
- 2.6 – 36.3km
- Mean velocity, P wave
- 5.9km/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: 4 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)4 stations | |||||
| LESLessines | 2.6 | 309 | 10:41:37.38+0.61 s | 10:41:37.56+0.79 s | 0.18 |
| SKQSteenkerque | 15.7 | 110 | 10:41:39.90+3.13 s | 10:41:41.99+5.22 s | 2.09 |
| RQRRonquières | 27.0 | 112 | 10:41:41.41+4.64 s | – | – |
| UCCBUccle | 36.3 | 72 | 10:41:43.28+6.51 s | – | – |
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