COMBLAIN-AU-PONT (BE)
Known mine explosion4 July 2011
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 10:52:382011-07-04
- UTC
- 08:52:382011-07-04
Main parameters
| Date and time | 2011-07-04 08:52:38 UTC 2011-07-04 10:52:38 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.484° N, 5.563° E Uncertainty ± 3.1 km |
| Event ID | ROB 4554 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2011-07-04 11:21:07 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
- 11.0 – 40.6km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.1km/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: 7 measurements, root-mean-square deviation 0.23 s. S wave: 7 measurements, root-mean-square deviation 0.24 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 | |||||
| STISart Tilman | 11.0 | 0 | 08:52:39.88+0.97 s | 08:52:41.39+2.48 s | 1.51 |
| LCHLa Chartreuse | 17.4 | 8 | 08:52:41.77+2.86 s | 08:52:43.91+5.00 s | 2.14 |
| CLAClavier | 19.9 | 249 | 08:52:41.54+2.63 s | 08:52:44.84+5.93 s | 3.30 |
| MEMHMembach | 34.6 | 66 | 08:52:44.42+5.51 s | 08:52:49.10+10.19 s | 4.68 |
| MEMSMembach | 34.6 | 66 | 08:52:44.53+5.62 s | 08:52:49.20+10.29 s | 4.67 |
| GESGesves | 35.6 | 252 | 08:52:44.57+5.66 s | 08:52:49.82+10.91 s | 5.25 |
| EBNEben-Emael | 35.7 | 13 | – | 08:52:49.26+10.35 s | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 40.6 | 40 | 08:52:45.70+6.79 s | – | – |