REBECQ (BE)
Quarry blast25 November 2021
- Magnitude
- 1.4ML
- Depth
- 2.5km ± 6.6
- Belgian time
- 11:26:322021-11-25
- UTC
- 10:26:322021-11-25
Main parameters
| Date and time | 2021-11-25 10:26:32 UTC 2021-11-25 11:26:32 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.661° N, 4.168° E Uncertainty ± 0.7 km |
| Depth of hypocenter | 2.5 ± 6.6 km |
| Event ID | ROB 14840 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-26 12:23:37 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
- 6.3 – 25.8km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.4km/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. Hypocenter at a depth of 2.5 km. P wave: 5 measurements, root-mean-square deviation 0.17 s. S wave: 4 measurements, root-mean-square deviation 0.22 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 | 6.3 | 258 | 10:26:34.07+1.26 s | 10:26:34.85+2.04 s | 0.78 |
| RQRRonquières | 7.3 | 146 | 10:26:34.10+1.29 s | – | – |
| SNFSeneffe | 18.6 | 154 | 10:26:36.47+3.66 s | 10:26:38.69+5.88 s | 2.22 |
| UCCBUccle | 20.3 | 42 | 10:26:36.63+3.82 s | 10:26:38.99+6.18 s | 2.36 |
| TGATangissart | 25.8 | 104 | 10:26:37.30+4.49 s | 10:26:40.19+7.38 s | 2.89 |
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