HAM-SUR-SAMBRE (BE)
Known mine explosion23 September 2008
- Magnitude
- –
- Depth
- 1.0km ± 2.1
- Belgian time
- 12:32:512008-09-23
- UTC
- 10:32:512008-09-23
Main parameters
| Date and time | 2008-09-23 10:32:51 UTC 2008-09-23 12:32:51 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.434° N, 4.676° E Uncertainty ± 2.0 km |
| Depth of hypocenter | 1.0 ± 2.1 km |
| Event ID | ROB 3756 |
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
- 5
- Epicentral distance
- 16.1 – 38.1km
- Mean velocity, P wave
- 6.2km/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 1.0 km. P wave: 5 measurements, root-mean-square deviation 0.12 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | |||||
| MRDMaredsous | 16.1 | 156 | 10:32:55.04+3.09 s | – | – |
| OT1OT1-Mellery | 19.6 | 338 | 10:32:55.34+3.39 s | – | – |
| OTTOttignies | 26.4 | 342 | 10:32:56.79+4.84 s | – | – |
| GESGesves | 29.7 | 100 | 10:32:57.18+5.23 s | – | – |
| DOUDourbes | 38.1 | 189 | 10:32:58.49+6.54 s | 10:33:03.37+11.42 s | 4.88 |
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