QUENAST (BE)
Known mine explosion29 October 2008
- Magnitude
- 1.2ML
- Depth
- 1.2km ± 1.2
- Belgian time
- 15:02:212008-10-29
- UTC
- 14:02:212008-10-29
Main parameters
| Date and time | 2008-10-29 14:02:21 UTC 2008-10-29 15:02:21 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.666° N, 4.156° E Uncertainty ± 0.7 km |
| Depth of hypocenter | 1.2 ± 1.2 km |
| Event ID | ROB 3812 |
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
- 5.7 – 85.8km
- 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 1.2 km. P wave: 12 measurements, root-mean-square deviation 0.21 s. S wave: 4 measurements, root-mean-square deviation 0.14 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 | ||||||
| SKQSteenkerque | 5.7 | 251 | 14:02:22.50+1.18 s | 14:02:23.06+1.74 s | 0.56 | 84.0 |
| RQRRonquières | 8.3 | 144 | 14:02:22.89+1.57 s | 14:02:23.89+2.57 s | 1.00 | 57.0 |
| SNFSeneffe | 19.5 | 152 | 14:02:25.04+3.72 s | 14:02:27.57+6.25 s | 2.53 | 8.9 |
| OT5OT5-Genappe | 20.6 | 102 | 14:02:24.98+3.66 s | 14:02:27.60+6.28 s | 2.62 | – |
| LESLessines | 22.7 | 283 | 14:02:25.44+4.12 s | – | – | – |
| OT2OT2-Rixensart | 26.4 | 81 | 14:02:25.84+4.52 s | – | – | – |
| OT4OT4-Limal | 29.0 | 83 | 14:02:26.59+5.27 s | – | – | – |
| OT1OT1-Mellery | 30.5 | 104 | 14:02:26.60+5.28 s | – | – | – |
| OT3OT3-Dion-le-Mont | 34.6 | 85 | 14:02:27.43+6.11 s | – | – | – |
| GRZGrand Leez | 44.3 | 102 | 14:02:29.42+8.10 s | – | – | – |
| GESGesves | 73.1 | 115 | 14:02:34.58+13.26 s | – | – | – |
| CLAClavier | 85.8 | 108 | 14:02:35.95+14.63 s | – | – | – |