ROCHEFORT (BE)
Known mine explosion22 June 2011
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 17:44:352011-06-22
- UTC
- 15:44:352011-06-22
Main parameters
| Date and time | 2011-06-22 15:44:35 UTC 2011-06-22 17:44:35 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.100° N, 5.190° E Uncertainty ± 4.9 km |
| Event ID | ROB 4535 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2011-07-05 08:03:15 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
- 9
- Epicentral distance
- 6.7 – 198.9km
- Mean velocity, P wave
- 5.1km/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: 8 measurements, root-mean-square deviation 0.64 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)9 stations | |||||
| RCHRochefort | 6.7 | 23 | 15:44:34.79−0.83 s | – | – |
| GESGesves | 32.5 | 347 | 15:44:39.32+3.70 s | – | – |
| CLAClavier | 36.4 | 13 | 15:44:39.69+4.07 s | – | – |
| MRDMaredsous | 37.6 | 307 | 15:44:39.69+4.07 s | – | – |
| DOUDourbes | 42.6 | 269 | 15:44:39.88+4.26 s | – | – |
| MEMSMembach | 81.3 | 46 | 15:44:48.37+12.75 s | – | – |
| MEMHMembach | 81.3 | 46 | 15:44:49.60+13.98 s | – | – |
| WLFWalferdange | 84.4 | 125 | 15:44:48.99+13.37 s | – | – |
| ZEVZevekote | 198.9 | 306 | 15:45:10.96+35.34 s | – | – |