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File:Cypress collapsed.jpg

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Cypress_collapsed.jpg(600 × 401 pixels, file size: 70 KB, MIME type: image/jpeg)

Description
English: Collapsed Cypress Street Viaduct.

Caption:

The Cypress Structure, the freeway approach to the Bay Bridge from Oakland, collapsed during the Loma Prieta earthquake, killing 42 people. At least two properties of the Earth's crust conspired to cause this collapse: it was built on loose soils that shook much more strongly than surrounding regions on stronger ground, and variations in the thickness of the Earth's crust between the epicenter of the Loma Prieta earthquake in the Santa Cruz Mountains and Oakland actually focused energy toward Oakland and downtown San Francisco.
Date Not dated. After the October 1989 Loma Prieta earthquake and before the ruined viaduct was demolished.
Source https://earthquake.usgs.gov/regional/nca/3Dgeologic/
Author USGS.

Licensing

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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File history

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Date/TimeThumbnailDimensionsUserComment
current01:24, 15 July 2009Thumbnail for version as of 01:24, 15 July 2009600 × 401 (70 KB)File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Collapsed en:Cypress Street Viaduct}} |Source=Transferred from [http://en.wikipedia.org en.wikipe

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