Researchers conduct a reaction wall lab test.

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Researcher Tarek Elkhoraibi at the NEES lab at University of California Berkeley. An actuator on the right attached to a concrete wall mimics the Northridge 1994 earthquake by putting force on the infilled brick wall until it fails. This is a test which takes place slowly and gradually so researchers can understand how a wall fails in an earthquake. ( Peter Essick / Aurora Photos )

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Size: 5120px × 3413px
Location: Richmond California USA
Photo credit: © Peter Essick / Aurora Photos / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: brick, building, ca, collapse, earthquake, earthquakes, experiment, force, laboratorr, laboratorry, quake, quakes, richmond, safety, science, shake, shaking, usa, wall