How the earth moved in the L’Aquila earthquake
DOI: 10.1063/PT.5.023272
Using interferometry--subtracting one picture from the other--Italian scientists overlaid the two radar pictures of the region to produce a map of colored waves.
Each colored ring is a measure of how much the ground has moved as a result of the earthquake.
The large green square represents the location of the main shock; the smaller green squares show large aftershocks. Along the yellow line east of L’Aquila geologists found an alignment of surface breaks after the quake, which indicate the orientation of the rupture. The colored wave pattern follows those breaks exactly, indicating that the ground had moved a few inches down to the left side of the yellow line. This movement is also represented by the black and white fault plane solution on the left.
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