QUENAST (BE)
Known mine explosion4 September 2008
- Magnitude
- 1.2ML
- Depth
- 1.6km ± 1.4
- Belgian time
- 14:48:332008-09-04
- UTC
- 12:48:332008-09-04
Main parameters
| Date and time | 2008-09-04 12:48:33 UTC 2008-09-04 14:48:33 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.669° N, 4.168° E Uncertainty ± 0.9 km |
| Depth of hypocenter | 1.6 ± 1.4 km |
| Event ID | ROB 3747 |
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
- 6.6 – 43.6km
- Mean velocity, P wave
- 5.9km/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 1.6 km. P wave: 6 measurements, root-mean-square deviation 0.10 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 | ||||||
| SKQSteenkerque | 6.6 | 250 | 12:48:34.91+1.34 s | 12:48:35.69+2.12 s | 0.78 | 44.5 |
| RQRRonquières | 8.1 | 150 | 12:48:35.14+1.57 s | 12:48:36.19+2.62 s | 1.05 | 33.0 |
| SNFSeneffe | 19.4 | 155 | 12:48:37.26+3.69 s | – | – | – |
| OT5OT5-Genappe | 19.8 | 103 | 12:48:37.18+3.61 s | 12:48:39.41+5.84 s | 2.23 | – |
| OT3OT3-Dion-le-Mont | 33.7 | 85 | 12:48:39.62+6.05 s | – | – | – |
| GRZGrand Leez | 43.6 | 103 | 12:48:41.03+7.46 s | – | – | – |
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