MARCHE-LES-DAMES (BE)
Known mine explosion31 October 2008
- Magnitude
- 0.9ML
- Depth
- 3.4km ± 5.5
- Belgian time
- 11:46:152008-10-31
- UTC
- 10:46:152008-10-31
Main parameters
| Date and time | 2008-10-31 10:46:15 UTC 2008-10-31 11:46:15 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.496° N, 4.982° E Uncertainty ± 2.4 km |
| Depth of hypocenter | 3.4 ± 5.5 km |
| Event ID | ROB 3791 |
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 – 52.4km
- Mean velocity, P wave
- 5.5km/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. Hypocenter at a depth of 3.4 km. P wave: 7 measurements, root-mean-square deviation 0.20 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 | 149 | 10:46:17.96+2.32 s | 10:46:20.31+4.67 s | 2.35 | – |
| GRZGrand Leez | 17.8 | 301 | 10:46:18.78+3.14 s | – | – | – |
| CLAClavier | 24.3 | 111 | 10:46:20.14+4.50 s | 10:46:23.66+8.02 s | 3.52 | 8.1 |
| OT3OT3-Dion-le-Mont | 32.4 | 313 | 10:46:21.48+5.84 s | 10:46:25.46+9.82 s | 3.98 | – |
| OTTOttignies | 34.9 | 301 | 10:46:21.79+6.15 s | – | – | – |
| OT5OT5-Genappe | 41.0 | 291 | 10:46:22.54+6.90 s | – | – | – |
| DOUDourbes | 52.4 | 212 | 10:46:25.18+9.54 s | – | – | – |
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