REBECQ (BE)
Quarry blast17 March 2020
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:30:552020-03-17
- UTC
- 11:30:552020-03-17
Main parameters
| Date and time | 2020-03-17 11:30:55 UTC 2020-03-17 12:30:55 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.670° N, 4.171° E Uncertainty ± 0.5 km |
| Event ID | ROB 9675 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-31 15:12:28 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
- 6.9 – 70.7km
- 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: 6 measurements, root-mean-square deviation 0.07 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 | 6.9 | 250 | 11:30:57.08+1.38 s | 11:30:57.85+2.15 s | 0.77 |
| RQRRonquières | 8.1 | 152 | 11:30:57.35+1.65 s | – | – |
| UCCBUccle | 19.4 | 43 | 11:30:59.28+3.58 s | – | – |
| UCCSUccle | 19.4 | 43 | 11:30:59.43+3.73 s | – | – |
| TGATangissart | 25.8 | 106 | 11:31:00.38+4.68 s | 11:31:03.18+7.48 s | 2.80 |
| DOUDourbes | 70.7 | 155 | 11:31:07.92+12.22 s | – | – |
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