REBECQ (BE)
Quarry blast11 March 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 15:05:192020-03-11
- UTC
- 14:05:192020-03-11
Main parameters
| Date and time | 2020-03-11 14:05:19 UTC 2020-03-11 15:05:19 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.684° N, 4.114° E Uncertainty ± 1.8 km |
| Event ID | ROB 9665 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-31 14:54:09 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
- 4
- Epicentral distance
- 4.5 – 30.2km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.2km/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: 4 measurements, root-mean-square deviation 0.13 s. S wave: 4 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)4 stations | |||||
| SKQSteenkerque | 4.5 | 212 | 14:05:20.54+0.99 s | 14:05:21.20+1.65 s | 0.66 |
| RQRRonquières | 11.7 | 138 | 14:05:21.84+2.29 s | 14:05:23.59+4.04 s | 1.75 |
| UCCBUccle | 21.5 | 54 | 14:05:23.16+3.61 s | 14:05:26.80+7.25 s | 3.64 |
| TGATangissart | 30.2 | 107 | 14:05:24.92+5.37 s | 14:05:28.94+9.39 s | 4.02 |