REBECQ (BE)
Quarry blast11 June 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:17:042020-06-11
- UTC
- 11:17:042020-06-11
Main parameters
| Date and time | 2020-06-11 11:17:04 UTC 2020-06-11 13:17:04 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.657° N, 4.166° E Uncertainty ± 0.8 km |
| Event ID | ROB 10255 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-11 15:57:46 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 – 25.8km
- Mean velocity, P wave
- 5.8km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.06 s. S wave: 4 measurements, root-mean-square deviation 0.31 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 | 262 | 11:17:06.37+1.38 s | 11:17:06.97+1.98 s | 0.60 |
| RQRRonquières | 7.0 | 144 | 11:17:06.63+1.64 s | – | – |
| UCCSUccle | 20.7 | 41 | 11:17:08.84+3.85 s | 11:17:11.89+6.90 s | 3.05 |
| UCCBUccle | 20.7 | 41 | 11:17:08.96+3.97 s | 11:17:11.52+6.53 s | 2.56 |
| TGATangissart | 25.8 | 103 | 11:17:09.75+4.76 s | 11:17:12.57+7.58 s | 2.82 |