REBECQ (BE)
Quarry blast15 April 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 10:16:532021-04-15
- UTC
- 08:16:532021-04-15
Main parameters
| Date and time | 2021-04-15 08:16:53 UTC 2021-04-15 10:16:53 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.663° N, 4.160° E Uncertainty ± 0.3 km |
| Event ID | ROB 13140 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-15 14:58:04 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
- 5.9 – 20.5km
- Mean velocity, P wave
- 5.5km/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 0.06 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 | 5.9 | 254 | 08:16:54.39+1.25 s | 08:16:55.13+1.99 s | 0.74 |
| RQRRonquières | 7.8 | 144 | 08:16:54.66+1.52 s | – | – |
| SNFSeneffe | 19.1 | 153 | 08:16:56.82+3.68 s | – | – |
| UCCBUccle | 20.5 | 43 | 08:16:56.94+3.80 s | 08:16:59.75+6.61 s | 2.81 |
Did you feel an earthquake?The inquiry takes just a few minutes. Every report helps seismologists assess the effects of the earthquake.
Take the inquiry