MARCHE-LES-DAMES (BE)
Known mine explosion30 October 2008
- Magnitude
- 1.1ML
- Depth
- 4.4km ± 5.3
- Belgian time
- 13:52:592008-10-30
- UTC
- 12:52:592008-10-30
Main parameters
| Date and time | 2008-10-30 12:52:59 UTC 2008-10-30 13:52:59 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.488° N, 4.964° E Uncertainty ± 2.1 km |
| Depth of hypocenter | 4.4 ± 5.3 km |
| Event ID | ROB 3804 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-04-27 16:33:58 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
- 14.4 – 92.3km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.4km/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 4.4 km. P wave: 7 measurements, root-mean-square deviation 0.46 s. S wave: 6 measurements, root-mean-square deviation 0.58 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)7 stations | ||||||
| GESGesves | 14.4 | 143 | 12:53:01.69+2.34 s | 12:53:03.83+4.48 s | 2.14 | 16.3 |
| CLAClavier | 25.2 | 108 | 12:53:03.74+4.39 s | 12:53:07.40+8.05 s | 3.66 | 19.5 |
| OT5OT5-Genappe | 40.2 | 293 | 12:53:06.38+7.03 s | 12:53:11.44+12.09 s | 5.06 | – |
| RCHRochefort | 41.5 | 153 | 12:53:06.52+7.17 s | 12:53:12.50+13.15 s | 5.98 | – |
| SNFSeneffe | 48.3 | 273 | 12:53:07.22+7.87 s | – | – | – |
| DOUDourbes | 51.0 | 211 | 12:53:07.06+7.71 s | 12:53:15.57+16.22 s | 8.51 | 10.6 |
| KLBKalborn | 92.3 | 117 | 12:53:15.28+15.93 s | 12:53:25.93+26.58 s | 10.65 | – |