SCLAYN (BE)
Quarry blast9 February 2021
- Magnitude
- -0.2ML
- Depth
- –
- Belgian time
- 12:06:222021-02-09
- UTC
- 11:06:222021-02-09
Main parameters
| Date and time | 2021-02-09 11:06:22 UTC 2021-02-09 12:06:22 Belgian time |
|---|---|
| Magnitude | ML -0.2 |
| Epicentral coordinates | 50.493° N, 5.054° E Uncertainty ± 2.6 km |
| Event ID | ROB 12465 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-24 15:00:03 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
- 12.2 – 39.7km
- Mean velocity, P wave
- 6.9km/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 0.27 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)4 stations | ||||||
| GESGesves | 12.2 | 169 | 11:06:25.49+2.59 s | 11:06:26.31+3.41 s | 0.82 | – |
| CLAClavier | 19.4 | 115 | 11:06:27.23+4.33 s | 11:06:28.68+5.78 s | 1.45 | 0.9 |
| MRDMaredsous | 29.4 | 224 | 11:06:28.05+5.15 s | 11:06:32.04+9.14 s | 3.99 | – |
| TGATangissart | 39.7 | 288 | 11:06:29.75+6.85 s | – | – | – |
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