FERNELMONT (BE)
Quarry blast7 January 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:20:282019-01-07
- UTC
- 13:20:282019-01-07
Main parameters
| Date and time | 2019-01-07 13:20:28 UTC 2019-01-07 14:20:28 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.530° N, 5.005° E Uncertainty ± 2.3 km |
| Event ID | ROB 7575 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-07 15:47:29 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
- 14
- Epicentral distance
- 17.1 – 126.5km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.4km/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: 13 measurements, root-mean-square deviation 0.24 s. S wave: 6 measurements, root-mean-square deviation 0.47 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)14 stations | |||||
| GESGesves | 17.1 | 160 | 13:20:30.79+2.36 s | 13:20:32.78+4.35 s | 1.99 |
| CLAClavier | 24.4 | 120 | 13:20:32.63+4.20 s | – | – |
| MRDMaredsous | 30.4 | 214 | 13:20:33.26+4.83 s | 13:20:37.34+8.91 s | 4.08 |
| RCHRochefort | 44.6 | 159 | 13:20:35.86+7.43 s | 13:20:41.94+13.51 s | 6.08 |
| UCCBUccle | 54.4 | 303 | 13:20:37.70+9.27 s | 13:20:44.48+16.05 s | 6.78 |
| EBNEben-Emael | 56.1 | 58 | 13:20:38.09+9.66 s | – | – |
| DOUDourbes | 56.5 | 211 | 13:20:38.07+9.64 s | 13:20:44.44+16.01 s | 6.37 |
| SKQSteenkerque | 66.8 | 282 | 13:20:39.42+10.99 s | – | – |
| MEMHMembach | 71.7 | 83 | 13:20:40.90+12.47 s | – | – |
| MEMSMembach | 71.7 | 83 | 13:20:41.17+12.74 s | – | – |
| HOUHouvegnez | 73.7 | 105 | 13:20:41.40+12.97 s | – | – |
| MOLTMol | 76.3 | 4 | 13:20:41.78+13.35 s | – | – |
| KLBKalborn | 92.0 | 121 | 13:20:44.65+16.22 s | 13:20:54.55+26.12 s | 9.90 |
| WLFWalferdange | 126.5 | 139 | 13:20:50.05+21.62 s | – | – |