LIBRAMONT-CHEVIGNY (BE)
Known mine explosion19 April 2013
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 13:50:382013-04-19
- UTC
- 11:50:382013-04-19
Main parameters
| Date and time | 2013-04-19 11:50:38 UTC 2013-04-19 13:50:38 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 49.853° N, 5.354° E Uncertainty ± 4.1 km |
| Event ID | ROB 4844 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2013-04-19 14:12:59 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
- 11
- Epicentral distance
- 60.7 – 126.9km
- Mean velocity, P wave
- 6.3km/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 0.65 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)10 stations | |||||
| DOUDourbes | 60.7 | 297 | 11:50:51.72+13.07 s | 11:50:58.23+19.58 s | 6.51 |
| WLFWalferdange | 61.2 | 110 | 11:50:52.93+14.28 s | – | – |
| GESGesves | 62.2 | 342 | 11:50:51.05+12.40 s | 11:50:57.34+18.69 s | 6.29 |
| CLAClavier | 63.1 | 357 | 11:50:50.82+12.17 s | 11:50:57.35+18.70 s | 6.53 |
| MRDMaredsous | 65.2 | 320 | 11:50:51.97+13.32 s | 11:50:58.82+20.17 s | 6.85 |
| HOUHouvegnez | 72.7 | 40 | 11:50:52.93+14.28 s | – | – |
| SNFSeneffe | 105.8 | 314 | 11:50:57.91+19.26 s | – | – |
| EBNEben-Emael | 107.6 | 12 | 11:50:58.91+20.26 s | – | – |
| BOUBougnies | 117.1 | 301 | 11:51:00.71+22.06 s | – | – |
| SKQSteenkerque | 126.9 | 315 | 11:51:02.99+24.34 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 109.4 | 22 | 11:50:59.06+20.41 s | – | – |