REBECQ (BE)
Quarry blast4 December 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 11:29:282020-12-04
- UTC
- 10:29:282020-12-04
Main parameters
| Date and time | 2020-12-04 10:29:28 UTC 2020-12-04 11:29:28 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.663° N, 4.169° E Uncertainty ± 1.8 km |
| Event ID | ROB 11470 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-12-04 13:18:06 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
- 6.5 – 72.1km
- 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 0.12 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 | 6.5 | 256 | 10:29:29.84+1.31 s | 10:29:30.64+2.11 s | 0.80 |
| RQRRonquières | 7.5 | 148 | 10:29:30.10+1.57 s | – | – |
| UCCBUccle | 20.1 | 42 | 10:29:32.47+3.94 s | 10:29:34.90+6.37 s | 2.43 |
| TGATangissart | 25.8 | 104 | 10:29:33.10+4.57 s | 10:29:35.74+7.21 s | 2.64 |
| GESGesves | 72.1 | 115 | 10:29:41.45+12.92 s | – | – |
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