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<br /> Hazard Mitigation Plan | 2022 <br />Earthquake Hazards <br />- 65 - <br />Earthquake Related Hazards <br />Ground shaking, landslides, and liquefaction are the specific hazards associated with <br />earthquakes. The severity of these hazards depends on several factors, including soil and slope <br />conditions, proximity to the fault, earthquake magnitude, and the type of earthquake. <br /> <br />Ground Shaking <br />Ground shaking is the motion felt on the earth's surface caused by seismic waves generated by <br />the earthquake. It is the primary cause of earthquake damage. The strength of ground shaking <br />depends on the magnitude of the earthquake, the type of fault, and distance from the epicenter <br />(where the earthquake originates). Buildings on poorly consolidated and thick soils will typically <br />see more damage than buildings on consolidated soils and bedrock. <br /> <br />Earthquake-Induced Landslides <br />Earthquake-induced landslides are secondary earthquake hazards that occur from ground <br />shaking. They can destroy the roads, buildings, utilities, and other critical facilities necessary to <br />respond and recover from an earthquake. Many communities in Southern California have a high <br />likelihood of encountering such risks, especially in areas with steep slopes. <br /> <br />Rock falls may happen suddenly and without warning but are more likely to occur in response to <br />earthquake induced ground shaking, during periods of intense rainfall, or as a result of human <br />activities, such as grading and blasting. Ground acceleration of at least 0.10g in steep terrain is <br />necessary to induce earthquake-related rock falls. <br /> <br />The following map shows the minimal risk of earthquake-induced landslide risk within the City. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />