MARCHE-LES-DAMES (BE)
Known mine explosion25 September 2008
- Magnitude
- 1.3ML
- Depth
- 1.5km ± 3.8
- Belgian time
- 13:51:222008-09-25
- UTC
- 11:51:222008-09-25
Main parameters
| Date and time | 2008-09-25 11:51:22 UTC 2008-09-25 13:51:22 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.486° N, 4.961° E Uncertainty ± 1.3 km |
| Depth of hypocenter | 1.5 ± 3.8 km |
| Event ID | ROB 3761 |
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
- 12
- Epicentral distance
- 14.4 – 92.4km
- Mean velocity, P wave
- 5.7km/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 1.5 km. P wave: 11 measurements, root-mean-square deviation 0.29 s. S wave: 4 measurements, root-mean-square deviation 0.21 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)12 stations | ||||||
| GESGesves | 14.4 | 142 | 11:51:24.33+1.96 s | 11:51:26.53+4.16 s | 2.20 | 50.0 |
| GRZGrand Leez | 17.2 | 307 | 11:51:25.28+2.91 s | – | – | – |
| MRDMaredsous | 24.7 | 214 | 11:51:26.91+4.54 s | – | – | – |
| CLAClavier | 25.3 | 107 | 11:51:26.29+3.92 s | 11:51:30.27+7.90 s | 3.98 | 18.0 |
| OT1OT1-Mellery | 30.2 | 294 | – | 11:51:31.47+9.10 s | – | – |
| OT3OT3-Dion-le-Mont | 32.2 | 316 | 11:51:28.06+5.69 s | – | – | – |
| OT5OT5-Genappe | 40.1 | 293 | 11:51:29.37+7.00 s | – | – | – |
| RCHRochefort | 41.4 | 153 | 11:51:29.45+7.08 s | 11:51:34.64+12.27 s | 5.19 | – |
| SNFSeneffe | 48.1 | 274 | 11:51:30.20+7.83 s | – | – | – |
| DOUDourbes | 50.7 | 211 | 11:51:31.51+9.14 s | – | – | – |
| MEMSMembach | 75.6 | 79 | 11:51:35.25+12.88 s | – | – | – |
| KLBKalborn | 92.4 | 117 | 11:51:38.65+16.28 s | – | – | – |