FERNELMONT (BE)
Quarry blast5 August 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:46:172020-08-05
- UTC
- 11:46:172020-08-05
Main parameters
| Date and time | 2020-08-05 11:46:17 UTC 2020-08-05 13:46:17 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.510° N, 4.976° E Uncertainty ± 0.9 km |
| Event ID | ROB 10615 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-05 15:14:54 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
- 10
- Epicentral distance
- 15.9 – 92.7km
- Mean velocity, P wave
- 5.8km/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: 10 measurements, root-mean-square deviation 0.32 s. S wave: 7 measurements, root-mean-square deviation 0.47 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)9 stations | |||||
| GESGesves | 15.9 | 150 | 11:46:20.04+2.35 s | 11:46:22.29+4.60 s | 2.25 |
| CLAClavier | 25.3 | 113 | 11:46:22.27+4.58 s | 11:46:25.57+7.88 s | 3.30 |
| MRDMaredsous | 27.4 | 213 | 11:46:22.56+4.87 s | 11:46:26.76+9.07 s | 4.20 |
| TGATangissart | 33.9 | 288 | 11:46:23.34+5.65 s | 11:46:28.29+10.60 s | 4.95 |
| RCHRochefort | 43.3 | 155 | 11:46:24.99+7.30 s | 11:46:31.42+13.73 s | 6.43 |
| DOUDourbes | 53.5 | 211 | 11:46:27.22+9.53 s | – | – |
| MEMHMembach | 74.1 | 81 | 11:46:30.68+12.99 s | – | – |
| HOUHouvegnez | 75.2 | 103 | 11:46:30.68+12.99 s | 11:46:39.75+22.06 s | 9.07 |
| KLBKalborn | 92.7 | 119 | 11:46:34.28+16.59 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.3 | 67 | 11:46:29.92+12.23 s | 11:46:40.17+22.48 s | 10.25 |