FLORENNES (BE)
Quarry blast6 July 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:49:052020-07-06
- UTC
- 10:49:052020-07-06
Main parameters
| Date and time | 2020-07-06 10:49:05 UTC 2020-07-06 12:49:05 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.250° N, 4.614° E Uncertainty ± 1.2 km |
| Event ID | ROB 10415 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-06 17:25:57 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
- 12.4 – 52.5km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.2km/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 0.26 s. S wave: 4 measurements, root-mean-square deviation 0.35 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 | 12.4 | 62 | 10:49:07.79+1.83 s | 10:49:09.77+3.81 s | 1.98 |
| DOUDourbes | 17.3 | 185 | 10:49:09.23+3.27 s | 10:49:11.58+5.62 s | 2.35 |
| GESGesves | 36.9 | 66 | 10:49:12.90+6.94 s | 10:49:17.99+12.03 s | 5.09 |
| TGATangissart | 40.0 | 351 | 10:49:13.01+7.05 s | – | – |
| RCHRochefort | 45.0 | 103 | 10:49:13.95+7.99 s | 10:49:19.64+13.68 s | 5.69 |
| CLAClavier | 52.5 | 69 | 10:49:15.84+9.88 s | – | – |