QUENAST (BE)
Known mine explosion26 September 2008
- Magnitude
- –
- Depth
- 0.9km ± 26.4
- Belgian time
- 12:01:232008-09-26
- UTC
- 10:01:232008-09-26
Main parameters
| Date and time | 2008-09-26 10:01:23 UTC 2008-09-26 12:01:23 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.676° N, 4.150° E Uncertainty ± 7.8 km |
| Depth of hypocenter | 0.9 ± 26.4 km |
| Event ID | ROB 3781 |
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
- 9
- Epicentral distance
- 5.8 – 153.3km
- Mean velocity, P wave
- 5.2km/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: 8 measurements, root-mean-square deviation 1.95 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)9 stations | |||||
| SKQSteenkerque | 5.8 | 239 | 10:01:24.48+259201.10 s | – | – |
| RQRRonquières | 9.4 | 146 | 10:01:26.31+259202.93 s | – | – |
| SNFSeneffe | 20.7 | 153 | 10:01:26.85+259203.47 s | – | – |
| OT4OT4-Limal | 29.3 | 86 | 10:01:28.58+259205.20 s | – | – |
| BOUBougnies | 35.1 | 205 | 10:01:24.71+259201.33 s | – | – |
| MRDMaredsous | 60.5 | 133 | 10:01:36.25+259212.87 s | – | – |
| DOUDourbes | 72.0 | 154 | 10:01:36.32+259212.94 s | – | – |
| CLAClavier | 86.5 | 109 | 10:01:39.96+259216.58 s | – | – |
| KLBKalborn | 153.3 | 114 | 10:01:48.86+259225.48 s | – | – |