REBECQ (BE)
Quarry blast30 September 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 11:41:252021-09-30
- UTC
- 09:41:252021-09-30
Main parameters
| Date and time | 2021-09-30 09:41:25 UTC 2021-09-30 11:41:25 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.668° N, 4.171° E Uncertainty ± 1.4 km |
| Event ID | ROB 14525 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-10-01 09:14:44 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
- 6.8 – 25.8km
- 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 0.20 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 | 6.8 | 252 | 09:41:27.12+1.43 s | 09:41:27.97+2.28 s | 0.85 |
| RQRRonquières | 7.9 | 151 | 09:41:27.34+1.65 s | – | – |
| SNFSeneffe | 19.2 | 155 | 09:41:29.47+3.78 s | – | – |
| UCCBUccle | 19.6 | 43 | 09:41:29.74+4.05 s | 09:41:31.87+6.18 s | 2.13 |
| TGATangissart | 25.8 | 106 | 09:41:30.24+4.55 s | – | – |
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