REBECQ (BE)
Quarry blast28 April 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:36:322021-04-28
- UTC
- 10:36:322021-04-28
Main parameters
| Date and time | 2021-04-28 10:36:32 UTC 2021-04-28 12:36:32 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.677° N, 4.111° E Uncertainty ± 0.7 km |
| Event ID | ROB 13245 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-29 18:11:16 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
- 3.8 – 22.2km
- Mean velocity, P wave
- 5.4km/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: 4 measurements, root-mean-square deviation 0.10 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 | 3.8 | 215 | 10:36:33.19+0.76 s | 10:36:33.81+1.38 s | 0.62 |
| RQRRonquières | 11.3 | 134 | 10:36:34.51+2.08 s | – | – |
| UCCBUccle | 22.1 | 53 | 10:36:36.44+4.01 s | 10:36:39.57+7.14 s | 3.13 |
| SNFSeneffe | 22.2 | 146 | 10:36:36.73+4.30 s | – | – |
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