The M 6.0 South Napa earthquake that occurred on 24 August 2014, strongly shook the City of Napa, damaging residential and commercial buildings from Brown’s Valley through the historic downtown. The damage to wood‐frame houses occurred largely from broken and cracked chimneys, although a number of houses were shifted on their foundations, or suffered racking or failure of cripple walls. In the downtown area, many masonry buildings, both unreinforced and retrofitted, were damaged, including the 1870 Napa courthouse.

When earthquakes damage municipalities, it is important for planners and residents to understand the factors that condition this damage, because these factors...

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