LESSINES (BE)
Known mine explosion23 October 2008
- Magnitude
- 1.0ML
- Depth
- 2.9km ± 3.1
- Belgian time
- 14:47:342008-10-23
- UTC
- 12:47:342008-10-23
Main parameters
| Date and time | 2008-10-23 12:47:34 UTC 2008-10-23 14:47:34 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.721° N, 3.831° E Uncertainty ± 6.2 km |
| Depth of hypocenter | 2.9 ± 3.1 km |
| Event ID | ROB 3823 |
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
- 6
- Epicentral distance
- 1.4 – 52.0km
- Mean velocity, P wave
- 5.7km/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 2.9 km. P wave: 6 measurements, root-mean-square deviation 0.59 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)6 stations | ||||||
| LESLessines | 1.4 | 142 | 12:47:35.65+0.72 s | – | – | – |
| SKQSteenkerque | 19.3 | 114 | 12:47:38.42+3.49 s | 12:47:40.73+5.80 s | 2.31 | 12.6 |
| RQRRonquières | 30.6 | 114 | 12:47:40.17+5.24 s | 12:47:44.19+9.26 s | 4.02 | – |
| BOUBougnies | 37.8 | 168 | 12:47:43.06+8.13 s | 12:47:50.06+15.13 s | 7.00 | – |
| SNFSeneffe | 39.7 | 126 | 12:47:41.75+6.82 s | – | – | – |
| OTTOttignies | 52.0 | 97 | 12:47:43.88+8.95 s | – | – | – |
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