FERNELMONT (BE)
Quarry blast19 March 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 13:32:172020-03-19
- UTC
- 12:32:172020-03-19
Main parameters
| Date and time | 2020-03-19 12:32:17 UTC 2020-03-19 13:32:17 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.509° N, 4.973° E Uncertainty ± 0.5 km |
| Event ID | ROB 9525 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-19 15:32:57 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
- 8
- Epicentral distance
- 16.0 – 108.5km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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: 8 measurements, root-mean-square deviation 0.29 s. S wave: 4 measurements, root-mean-square deviation 0.20 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)7 stations | |||||
| GESGesves | 16.0 | 150 | 12:32:20.05+2.52 s | 12:32:22.19+4.66 s | 2.14 |
| CLAClavier | 25.4 | 113 | 12:32:22.19+4.66 s | 12:32:25.64+8.11 s | 3.45 |
| MRDMaredsous | 27.2 | 212 | 12:32:22.51+4.98 s | – | – |
| TGATangissart | 33.7 | 289 | 12:32:23.61+6.08 s | 12:32:27.88+10.35 s | 4.27 |
| RCHRochefort | 43.3 | 155 | 12:32:25.35+7.82 s | 12:32:30.79+13.26 s | 5.44 |
| KLBKalborn | 92.8 | 119 | 12:32:34.35+16.82 s | – | – |
| VIAVianden | 108.5 | 126 | 12:32:36.20+18.67 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.5 | 67 | 12:32:30.18+12.65 s | – | – |