REBECQ (BE)
Quarry blast15 June 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 11:18:252021-06-15
- UTC
- 09:18:252021-06-15
Main parameters
| Date and time | 2021-06-15 09:18:25 UTC 2021-06-15 11:18:25 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.665° N, 4.164° E Uncertainty ± 0.7 km |
| Event ID | ROB 13705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-18 11:16:40 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
- 6.2 – 26.2km
- Mean velocity, P wave
- 5.8km/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 | 6.2 | 254 | 09:18:26.71+1.27 s | 09:18:27.55+2.11 s | 0.84 |
| RQRRonquières | 7.8 | 147 | 09:18:26.98+1.54 s | – | – |
| SNFSeneffe | 19.1 | 154 | 09:18:29.14+3.70 s | – | – |
| UCCBUccle | 20.2 | 43 | 09:18:29.32+3.88 s | 09:18:31.90+6.46 s | 2.58 |
| TGATangissart | 26.2 | 105 | 09:18:30.02+4.58 s | – | – |
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