GOEFERDINGE (BE)
Known mine explosion29 July 2008
- Magnitude
- 1.9ML
- Depth
- 0.9km ± 8.4
- Belgian time
- 11:11:362008-07-29
- UTC
- 09:11:362008-07-29
Main parameters
| Date and time | 2008-07-29 09:11:36 UTC 2008-07-29 11:11:36 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.758° N, 3.845° E Uncertainty ± 6.7 km |
| Depth of hypocenter | 0.9 ± 8.4 km |
| Event ID | ROB 3124 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2009-08-19 14:38:57 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
- 5.2 – 153.9km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.2km/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 0.27 s. S wave: 5 measurements, root-mean-square deviation 0.79 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)9 stations | ||||||
| LESLessines | 5.2 | 182 | 09:11:37.38+0.57 s | – | – | – |
| SKQSteenkerque | 20.5 | 126 | 09:11:40.06+3.25 s | 09:11:42.62+5.81 s | 2.56 | 319.0 |
| RQRRonquières | 31.7 | 122 | 09:11:41.86+5.05 s | 09:11:45.88+9.07 s | 4.02 | 128.0 |
| SNFSeneffe | 41.5 | 131 | 09:11:43.43+6.62 s | – | – | – |
| BOUBougnies | 41.7 | 170 | 09:11:44.26+7.45 s | – | – | – |
| DOUDourbes | 91.0 | 144 | 09:11:52.68+15.87 s | 09:12:03.39+26.58 s | 10.71 | 8.5 |
| CLAClavier | 109.8 | 110 | 09:11:56.15+19.34 s | 09:12:11.75+34.94 s | 15.60 | 14.5 |
| RCHRochefort | 118.9 | 124 | 09:11:58.32+21.51 s | 09:12:13.07+36.26 s | 14.75 | – |
| MEMSMembach | 153.9 | 95 | 09:12:03.10+26.29 s | 09:12:20.57+43.76 s | 17.47 | 16.0 |