REBECQ (BE)
Quarry blast20 May 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 11:16:492021-05-20
- UTC
- 09:16:492021-05-20
Main parameters
| Date and time | 2021-05-20 09:16:49 UTC 2021-05-20 11:16:49 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.664° N, 4.170° E Uncertainty ± 4.0 km |
| Event ID | ROB 13480 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-20 12:09:21 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
- 6.6 – 25.7km
- 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 0.13 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 | 6.6 | 256 | 09:16:50.59+1.26 s | 09:16:51.59+2.26 s | 1.00 |
| RQRRonquières | 7.5 | 149 | 09:16:50.79+1.46 s | – | – |
| SNFSeneffe | 18.8 | 155 | 09:16:52.97+3.64 s | – | – |
| UCCBUccle | 20.0 | 42 | 09:16:53.16+3.83 s | 09:16:55.63+6.30 s | 2.47 |
| TGATangissart | 25.7 | 105 | 09:16:53.84+4.51 s | – | – |
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