MARCHE-LES-DAMES (BE)
Known mine explosion8 September 2008
- Magnitude
- 1.7ML
- Depth
- 1.0km ± 3.9
- Belgian time
- 13:56:242008-09-08
- UTC
- 11:56:242008-09-08
Main parameters
| Date and time | 2008-09-08 11:56:24 UTC 2008-09-08 13:56:24 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.502° N, 4.977° E Uncertainty ± 1.6 km |
| Depth of hypocenter | 1.0 ± 3.9 km |
| Event ID | ROB 3721 |
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
- 9
- Epicentral distance
- 15.2 – 92.2km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.3km/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 1.0 km. P wave: 9 measurements, root-mean-square deviation 0.32 s. S wave: 4 measurements, root-mean-square deviation 0.03 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)9 stations | ||||||
| GESGesves | 15.2 | 149 | 11:56:26.54+2.20 s | 11:56:28.76+4.42 s | 2.22 | – |
| GRZGrand Leez | 17.2 | 300 | 11:56:27.54+3.20 s | 11:56:29.35+5.01 s | 1.81 | 99.5 |
| CLAClavier | 24.8 | 112 | 11:56:28.59+4.25 s | – | – | – |
| MRDMaredsous | 26.8 | 214 | 11:56:28.16+3.82 s | – | – | – |
| OT3OT3-Dion-le-Mont | 31.7 | 312 | 11:56:30.01+5.67 s | – | – | – |
| RCHRochefort | 42.5 | 155 | 11:56:31.73+7.39 s | 11:56:37.02+12.68 s | 5.29 | – |
| DOUDourbes | 52.9 | 211 | 11:56:33.90+9.56 s | 11:56:40.21+15.87 s | 6.31 | 18.6 |
| MEMSMembach | 74.1 | 80 | 11:56:37.37+13.03 s | – | – | – |
| KLBKalborn | 92.2 | 119 | 11:56:40.50+16.16 s | – | – | – |