DALHEM (BE)
Known mine explosion2 August 2013
- Magnitude
- 2.0ML
- Depth
- 5.0km
- Belgian time
- 16:03:302013-08-02
- UTC
- 14:03:302013-08-02
Main parameters
| Date and time | 2013-08-02 14:03:30 UTC 2013-08-02 16:03:30 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.715° N, 5.744° E Uncertainty ± 7.5 km |
| Depth of hypocenter | 5.0 km |
| Event ID | ROB 4926 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2013-08-05 08:50:32 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
- 7
- Epicentral distance
- 13.3 – 120.4km
- Mean velocity, P 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. Hypocenter at a depth of 5.0 km. P wave: 6 measurements, root-mean-square deviation 1.37 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)6 stations | |||||
| LCHLa Chartreuse | 13.3 | 231 | 14:03:30.93−0.03 s | – | – |
| STISart Tilman | 19.4 | 221 | 14:03:32.11+1.15 s | – | – |
| MEMHMembach | 22.2 | 122 | 14:03:34.18+3.22 s | – | – |
| HOUHouvegnez | 44.2 | 155 | 14:03:41.42+10.46 s | – | – |
| CLAClavier | 45.4 | 224 | 14:03:42.28+11.32 s | – | – |
| WLFWalferdange | 120.4 | 166 | 14:03:50.30+19.34 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 14.3 | 67 | 14:03:34.91+3.95 s | – | – |