(Top) 3-D perspective view looking NW along the Dinar-Civril normal
fault, which moved in an earthquake of Ms = 6.1 in 1995.
The view is a LANDSAT TM image draped over a digital elevation
model generated using tandem radar images. The 1995 earthquake ruptured
~10 km of the fault along the base of the escarpment, marked by a red line,
and downthrown to the SW (left). Thin coloured lines are digitized outlines
of the colour fringes shown below: the width of the fringe pattern
in the hanging wall is about 13 km.
(Bottom) An interferogram made from SAR images before and after
the Dinar earthquake, draped over the digital topography. Again the 1995
fault rupture is marked by a red line. Each fringe in the interferogram
corresponds to a 28 mm change in the line-of-sight distance to the satellite,
in this case about 23 degrees to the vertical. In the hanging wall (left)
there are 21 fringes, indicating a maximum line-of-sight downthrown displacement
of 590 mm. Only three upthrown fringes (80 mm) occur in the footwall
(right) side of the fault. Dislocation modelling and analysis of the seismic
waveforms show that the fault dipped at ~45 degrees to the SW and slipped
to a depth of ~8 km.
For full details please refer to:
Wright, T.J., B. Parsons, J. Jackson, M.
Haynes, E. Fielding, P. England, P. Clarke, Source parameters of the
1
October 1995 Dinar (Turkey) earthquake from SAR interferometry and
seismic bodywave modelling, Earth
Planet. Sci. Lett., 172, 23-37, 1999 [Abstract,
PDF
reprint, 2.3 MB]