Italy, November 1994 - A strong storm struck the Eastern Alps with heavy rains in northern Italy which produced the region's worst disaster since 1913. Seventy people were killed and 450, 000 hectares were flooded with damages costing $5 billion.
Highways, railways and roads were closed for several days, some requiring months to repair or rebuild. The worst affected areas are; Alba, Asti and Alessandra along the Tanaro River.
A series of ERS-1 Satellite images were acquired during the floods which show the extent of the flooding in some of the worst affected areas.
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Event Timeline |
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ERS-1 SAR Satellite images |
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A series of ERS-1 Satellite images were acquired during the floods which show the extent of the flooding in some of the worst affected areas.
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This image was acquired during the storm which comprises of two standard ERS-1 scenes. The Po and Tanaro Rivers surrounding the Alessandria, Alba and Pavia areas are visible in this image.
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ERS-1 standard scenes |
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This image shows the flooded areas along the two rivers, highlighting the unusual width of the Po River.
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Technical Information |
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Satellite: |
ERS |
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Instrument: |
Synthetic Aperture Radar (SAR) |
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Image area coverage: |
150 X 150 km |
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Date of acquisition: |
Red - 09 November 1995
Green - 04 October 1995
Blue - 04 October 1995 |
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These images show the situation before and during the flooding in the City of Alessandria along the Tanaro River.
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Referenced image ¿ Before the flood (Normal situation) |
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Extensive flooded areas ¿ During the flood |
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These images were acquired before the reference image (above). The interpreted images were annotated immediately on arrival from the reception station.
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Multi-temporal images |
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This image has been composed using the Red, Green and Blue channels.
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Reference image - Normal situation |
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Technical Information |
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Satellite: |
ERS |
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Instrument: |
Synthetic Aperture Radar (SAR) |
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Image area coverage: |
30 X 25 km |
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Date of acquisition: |
Red - 09 November 1995
Green - 04 October 1994
Blue - 04 October 1994 |
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This Cyan image was created using an artificial channel (Second Principal Component). The image shows the flooded areas along the Tanaro River ¿ a total surface of 15.7 sq km.
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Cyan image (Second Principal Component) |
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Technical Information |
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Satellite: |
Landsat TM/ETM |
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Image area coverage: |
30 X 25 km |
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Date of acquisition: |
Red - 09 November 1994
Green - 04 October 1994
Blue ¿ 2nd Principal Component |
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Orbits: |
16823, 17354 |
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Frame: |
2691, 2709 |
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Acquired by: |
Fucino (Italy) |
Flood - Alessandra and Asti (Italy), November 1994
