LESSINES (BE)
Known mine explosion21 October 2008
- Magnitude
- 1.3ML
- Depth
- 0.9km ± 5.2
- Belgian time
- 11:57:282008-10-21
- UTC
- 09:57:282008-10-21
Main parameters
| Date and time | 2008-10-21 09:57:28 UTC 2008-10-21 11:57:28 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.711° N, 3.851° E Uncertainty ± 10.9 km |
| Depth of hypocenter | 0.9 ± 5.2 km |
| Event ID | ROB 3805 |
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
- 0.6 – 52.6km
- Mean velocity, P wave
- 4.7km/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 0.9 km. P wave: 7 measurements, root-mean-square deviation 0.58 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 | ||||||
| LESLessines | 0.6 | 267 | 09:57:28.39+0.27 s | – | – | – |
| SKQSteenkerque | 17.6 | 113 | 09:57:31.02+2.90 s | – | – | – |
| RQRRonquières | 28.9 | 114 | 09:57:33.38+5.26 s | – | – | – |
| SNFSeneffe | 37.9 | 126 | 09:57:35.32+7.20 s | 09:57:39.06+10.94 s | 3.74 | 16.5 |
| OT5OT5-Genappe | 42.7 | 102 | 09:57:38.03+9.91 s | – | – | – |
| OTTOttignies | 50.5 | 96 | 09:57:38.32+10.20 s | – | – | – |
| OT1OT1-Mellery | 52.6 | 104 | 09:57:39.00+10.88 s | – | – | – |
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