The Morgan Hill Earthquake of April 24, 1984—Effects on United Technologies Corporation

United Technologies Chemical Systems Division, a manufacturer of rocket engine propellants, was situated in close proximity to the Calaveras fault. Soil conditions and fault rupture mechanisms produced anomalously high ground motion at the site. The main plant complex insisted of more than 130 buildings, constructed within the past 25 years to building code standards that considered earthquakes. Damage to buildings was not extensive and was limited to the structures founded in the valley on loose alluvial deposits. Most of the damage was associated with nonstructural building elements and equipment. Estimated repair costs exceeded $1.25 million. No lives were lost and only minor injuries were experienced. Important observations include: (1) soil amplification effects increased damage, and (2) that persons who had received blast response training responded far better than those who were not exposed to such training.