LA ROCHE-EN-ARDENNE (BE)
Known mine explosion11 August 2008
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 11:08:592008-08-11
- UTC
- 09:08:592008-08-11
Main parameters
| Date and time | 2008-08-11 09:08:59 UTC 2008-08-11 11:08:59 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.185° N, 5.590° E Uncertainty ± 0.9 km |
| Event ID | ROB 3143 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2010-02-26 11:43:44 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
- 4
- Epicentral distance
- 26.2 – 42.2km
- Mean velocity, P wave
- 6.3km/s
- Mean velocity, S wave
- 3.5km/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: 4 measurements, root-mean-square deviation 0.08 s. S wave: 4 measurements, root-mean-square deviation 0.10 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)4 stations | ||||||
| RCHRochefort | 26.2 | 263 | 09:09:03.73+4.69 s | 09:09:07.11+8.07 s | 3.38 | – |
| CLAClavier | 33.2 | 322 | 09:09:04.77+5.73 s | 09:09:09.28+10.24 s | 4.51 | 53.0 |
| KLBKalborn | 38.3 | 104 | 09:09:05.79+6.75 s | 09:09:10.62+11.58 s | 4.83 | 40.1 |
| GESGesves | 42.2 | 302 | 09:09:06.34+7.30 s | 09:09:11.61+12.57 s | 5.27 | 18.6 |