REBECQ (BE)
Quarry blast16 April 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:59:172020-04-16
- UTC
- 08:59:172020-04-16
Main parameters
| Date and time | 2020-04-16 08:59:17 UTC 2020-04-16 10:59:17 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.670° N, 4.167° E Uncertainty ± 0.9 km |
| Event ID | ROB 9825 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-16 11:26:45 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
- 6
- Epicentral distance
- 6.6 – 72.5km
- 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: 6 measurements, root-mean-square deviation 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.16 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)6 stations | |||||
| SKQSteenkerque | 6.6 | 249 | 08:59:19.13+1.40 s | 08:59:19.87+2.14 s | 0.74 |
| RQRRonquières | 8.2 | 150 | 08:59:19.46+1.73 s | – | – |
| UCCSUccle | 19.6 | 44 | 08:59:21.23+3.50 s | – | – |
| UCCBUccle | 19.6 | 44 | 08:59:21.86+4.13 s | 08:59:23.94+6.21 s | 2.08 |
| TGATangissart | 26.1 | 106 | 08:59:22.53+4.80 s | 08:59:25.44+7.71 s | 2.91 |
| GESGesves | 72.5 | 116 | 08:59:30.50+12.77 s | 08:59:39.32+21.59 s | 8.82 |