REBECQ (BE)
Quarry blast17 February 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:51:082021-02-17
- UTC
- 11:51:082021-02-17
Main parameters
| Date and time | 2021-02-17 11:51:08 UTC 2021-02-17 12:51:08 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.658° N, 4.164° E Uncertainty ± 0.8 km |
| Event ID | ROB 12485 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-25 22:51:23 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
- 6.0 – 72.2km
- Mean velocity, P wave
- 5.6km/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 0.11 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 | |||||
| SKQSteenkerque | 6.0 | 261 | 11:51:10.04+1.22 s | 11:51:10.89+2.07 s | 0.85 |
| RQRRonquières | 7.2 | 143 | 11:51:10.33+1.51 s | – | – |
| UCCBUccle | 20.8 | 42 | 11:51:12.69+3.87 s | – | – |
| TGATangissart | 26.0 | 103 | 11:51:13.36+4.54 s | 11:51:16.33+7.51 s | 2.97 |
| GESGesves | 72.2 | 115 | 11:51:21.84+13.02 s | 11:51:30.36+21.54 s | 8.52 |
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