REBECQ (BE)
Quarry blast9 March 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:59:342021-03-09
- UTC
- 11:59:342021-03-09
Main parameters
| Date and time | 2021-03-09 11:59:34 UTC 2021-03-09 12:59:34 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.681° N, 4.144° E Uncertainty ± 2.1 km |
| Event ID | ROB 12725 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-09 16:24:35 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
- 6
- Epicentral distance
- 5.8 – 74.5km
- Mean velocity, P wave
- 5.6km/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: 6 measurements, root-mean-square deviation 0.21 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)6 stations | |||||
| SKQSteenkerque | 5.8 | 232 | 11:59:35.75+1.19 s | 11:59:36.52+1.96 s | 0.77 |
| RQRRonquières | 10.1 | 146 | 11:59:36.00+1.44 s | – | – |
| UCCBUccle | 19.9 | 50 | 11:59:38.34+3.78 s | 11:59:40.80+6.24 s | 2.46 |
| SNFSeneffe | 21.4 | 152 | 11:59:38.16+3.60 s | – | – |
| DOUDourbes | 72.7 | 154 | 11:59:47.56+13.00 s | – | – |
| GESGesves | 74.5 | 116 | 11:59:47.65+13.09 s | – | – |
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