FERNELMONT (BE)
Quarry blast25 November 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 14:16:092021-11-25
- UTC
- 13:16:092021-11-25
Main parameters
| Date and time | 2021-11-25 13:16:09 UTC 2021-11-25 14:16:09 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.515° N, 5.006° E Uncertainty ± 4.2 km |
| Event ID | ROB 14870 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-06 13:48:58 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
- 4
- Epicentral distance
- 15.6 – 35.7km
- Mean velocity, P wave
- 5.6km/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: 4 measurements, root-mean-square deviation 0.17 s. S wave: 4 measurements, root-mean-square deviation 0.48 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)4 stations | |||||
| GESGesves | 15.6 | 158 | 13:16:12.46+2.70 s | 13:16:14.15+4.39 s | 1.69 |
| CLAClavier | 23.6 | 117 | 13:16:14.29+4.53 s | 13:16:17.56+7.80 s | 3.27 |
| MRDMaredsous | 29.1 | 216 | 13:16:15.05+5.29 s | 13:16:19.30+9.54 s | 4.25 |
| TGATangissart | 35.7 | 286 | 13:16:16.01+6.25 s | 13:16:20.37+10.61 s | 4.36 |