LESSINES (BE)
Known mine explosion25 September 2008
- Magnitude
- 0.7ML
- Depth
- 1.4km ± 3.5
- Belgian time
- 14:46:302008-09-25
- UTC
- 12:46:302008-09-25
Main parameters
| Date and time | 2008-09-25 12:46:30 UTC 2008-09-25 14:46:30 Belgian time |
|---|---|
| Magnitude | ML 0.7 |
| Epicentral coordinates | 50.732° N, 3.840° E Uncertainty ± 4.2 km |
| Depth of hypocenter | 1.4 ± 3.5 km |
| Event ID | ROB 3762 |
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
- 4
- Epicentral distance
- 2.3 – 39.9km
- Mean velocity, P wave
- 5.8km/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 1.4 km. P wave: 4 measurements, root-mean-square deviation 0.04 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)4 stations | ||||||
| LESLessines | 2.3 | 175 | 12:46:31.57+0.63 s | – | – | – |
| SKQSteenkerque | 19.3 | 119 | 12:46:34.37+3.43 s | 12:46:36.80+5.86 s | 2.43 | 6.1 |
| RQRRonquières | 30.6 | 117 | 12:46:36.27+5.33 s | – | – | – |
| SNFSeneffe | 39.9 | 128 | 12:46:37.96+7.02 s | – | – | – |
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