ROBERTVILLE (BE)
Known mine explosion28 July 2008
- Magnitude
- 1.4ML
- Depth
- 21.6km ± 22.3
- Belgian time
- 12:26:462008-07-28
- UTC
- 10:26:462008-07-28
Main parameters
| Date and time | 2008-07-28 10:26:46 UTC 2008-07-28 12:26:46 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.455° N, 6.112° E Uncertainty ± 31.6 km |
| Depth of hypocenter | 21.6 ± 22.3 km |
| Event ID | ROB 3122 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2009-08-19 14:38:55 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
- 5
- Epicentral distance
- 0.3 – 115.3km
- Mean velocity, P wave
- 10.9km/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 21.6 km. P wave: 4 measurements, root-mean-square deviation 1.47 s. S wave: 4 measurements, root-mean-square deviation 1.96 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)5 stations | ||||||
| ROBRobertville | 0.3 | 226 | 10:26:52.66+5.96 s | – | – | – |
| MEMSMembach | 18.6 | 337 | – | 10:26:54.44+7.74 s | – | 15.3 |
| CLAClavier | 57.7 | 266 | 10:26:52.98+6.28 s | 10:27:09.50+22.80 s | 16.52 | 47.0 |
| RCHRochefort | 71.3 | 242 | 10:26:54.12+7.42 s | 10:27:09.67+22.97 s | 15.55 | – |
| DOUDourbes | 115.3 | 250 | 10:27:00.32+13.62 s | 10:27:22.33+35.63 s | 22.01 | 4.2 |