REBECQ (BE)
Quarry blast7 September 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:44:262021-09-07
- UTC
- 09:44:262021-09-07
Main parameters
| Date and time | 2021-09-07 09:44:26 UTC 2021-09-07 11:44:26 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.656° N, 4.166° E Uncertainty ± 0.6 km |
| Event ID | ROB 14395 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-09-08 09:12:14 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
- 7
- Epicentral distance
- 6.1 – 25.8km
- Mean velocity, P wave
- 5.9km/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: 7 measurements, root-mean-square deviation 0.11 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)7 stations | |||||
| SKQSteenkerque | 6.1 | 262 | 09:44:27.80+1.27 s | 09:44:28.66+2.13 s | 0.86 |
| RQRRonquières | 7.0 | 143 | 09:44:28.01+1.48 s | – | – |
| SNFSeneffe | 18.2 | 153 | 09:44:30.08+3.55 s | 09:44:32.67+6.14 s | 2.59 |
| BRQBracquegnies | 19.6 | 186 | 09:44:30.06+3.53 s | – | – |
| UCCBUccle | 20.8 | 41 | 09:44:30.40+3.87 s | – | – |
| UCCSUccle | 20.8 | 41 | 09:44:30.51+3.98 s | – | – |
| TGATangissart | 25.8 | 103 | 09:44:31.09+4.56 s | 09:44:33.95+7.42 s | 2.86 |
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