REBECQ (BE)
Quarry blast15 July 2021
- Magnitude
- 0.5ML
- Depth
- –
- Belgian time
- 14:25:192021-07-15
- UTC
- 12:25:192021-07-15
Main parameters
| Date and time | 2021-07-15 12:25:19 UTC 2021-07-15 14:25:19 Belgian time |
|---|---|
| Magnitude | ML 0.5 |
| Epicentral coordinates | 50.702° N, 4.113° E Uncertainty ± 1.4 km |
| Event ID | ROB 14015 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-26 12:02:37 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
- 6.4 – 30.9km
- Mean velocity, P wave
- 5.8km/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 0.17 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 | 6.4 | 202 | 12:25:20.61+1.58 s | 12:25:21.23+2.20 s | 0.62 |
| RQRRonquières | 13.3 | 144 | 12:25:21.34+2.31 s | – | – |
| LESLessines | 19.1 | 273 | 12:25:22.60+3.57 s | 12:25:25.14+6.11 s | 2.54 |
| TGATangissart | 30.9 | 110 | 12:25:24.72+5.69 s | 12:25:28.71+9.68 s | 3.99 |
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