FLORENNES (BE)
Quarry blast25 March 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 10:47:002020-03-25
- UTC
- 09:47:002020-03-25
Main parameters
| Date and time | 2020-03-25 09:47:00 UTC 2020-03-25 10:47:00 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.253° N, 4.617° E Uncertainty ± 1.1 km |
| Event ID | ROB 9635 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-25 17:40:45 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
- 12.0 – 58.3km
- Mean velocity, P wave
- 5.7km/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 0.24 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 | |||||
| MRDMaredsous | 12.0 | 63 | 09:47:02.55+2.24 s | 09:47:04.30+3.99 s | 1.75 |
| DOUDourbes | 17.7 | 185 | 09:47:03.63+3.32 s | 09:47:06.09+5.78 s | 2.46 |
| GESGesves | 36.5 | 66 | 09:47:07.01+6.70 s | – | – |
| RCHRochefort | 44.9 | 104 | 09:47:08.69+8.38 s | 09:47:13.67+13.36 s | 4.98 |
| CLAClavier | 52.1 | 69 | 09:47:10.02+9.71 s | – | – |
| SKQSteenkerque | 58.3 | 319 | 09:47:10.37+10.06 s | – | – |
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