GELBRESSEE (BE)
Known mine explosion15 September 2008
- Magnitude
- 1.3ML
- Depth
- 1.1km ± 5.6
- Belgian time
- 14:09:402008-09-15
- UTC
- 12:09:402008-09-15
Main parameters
| Date and time | 2008-09-15 12:09:40 UTC 2008-09-15 14:09:40 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.520° N, 4.960° E Uncertainty ± 1.9 km |
| Depth of hypocenter | 1.1 ± 5.6 km |
| Event ID | ROB 3692 |
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
- 13
- Epicentral distance
- 15.2 – 94.2km
- Mean velocity, P wave
- 6.3km/s
- Mean velocity, S wave
- 3.4km/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 1.1 km. P wave: 13 measurements, root-mean-square deviation 1.03 s. S wave: 4 measurements, root-mean-square deviation 0.42 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)13 stations | ||||||
| GRZGrand Leez | 15.2 | 295 | 12:09:43.17+2.33 s | – | – | – |
| GESGesves | 17.6 | 149 | 12:09:43.26+2.42 s | 12:09:45.54+4.70 s | 2.28 | – |
| CLAClavier | 26.8 | 115 | 12:09:45.21+4.37 s | 12:09:49.21+8.37 s | 4.00 | 22.0 |
| MRDMaredsous | 27.9 | 209 | 12:09:45.76+4.92 s | 12:09:49.60+8.76 s | 3.84 | – |
| OT1OT1-Mellery | 28.7 | 287 | 12:09:45.44+4.60 s | – | – | – |
| OT5OT5-Genappe | 38.7 | 288 | 12:09:47.98+7.14 s | – | – | – |
| STISart Tilman | 43.3 | 81 | 12:09:49.40+8.56 s | – | – | – |
| RCHRochefort | 44.9 | 155 | 12:09:48.39+7.55 s | – | – | – |
| SNFSeneffe | 48.0 | 269 | 12:09:49.17+8.33 s | – | – | – |
| RQRRonquières | 53.0 | 281 | 12:09:50.09+9.25 s | – | – | – |
| DOUDourbes | 54.0 | 209 | 12:09:50.68+9.84 s | 12:09:56.98+16.14 s | 6.30 | – |
| BOUBougnies | 73.6 | 259 | 12:09:49.83+8.99 s | – | – | – |
| KLBKalborn | 94.2 | 119 | 12:09:56.70+15.86 s | – | – | – |