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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br /> <br /> <br />Chapter 4: Hazard Identification and Risk Assessment 116 <br />Date Magnitude Distance From Depth <br />(miles) <br />6/18/1994 4.3 7.3 miles SSE from Skykomish, WA -0.5 <br />1/7/1993 3.4 10.5 miles SW from Skykomish, WA 8.4 <br />10/25/1992 3.5 13.6 miles SW from Ellensburg, WA -0.5 <br />11/24/1991 3.2 4.03 miles SSW from Entiat, WA 3.7 <br />7/6/1991 3.4 10.42 miles SE from Ellensburg, WA 2.1 <br />7/6/1991 3.3 10.6 miles SE from Ellensburg, WA 3.2 <br />3/27/1991 3.3 5.02 miles WNW from Entiat, WA -0.3 <br />2/22/1991 3.2 10.23 miles SW from Ellensburg, WA 7.6 <br />2/1/1991 3.4 12.8 miles SSW from Ellensburg, WA 3.6 <br />2/28/1990 3.1 19.5 miles E from Skykomish, WA -0.2 <br />5/4/1988 3.3 4.7 miles W from Entiat, WA 3.4 <br />12/2/1987 4.3 9.6 miles NW from Yakima, WA 10.4 <br />12/1/1987 4.1 9.8 miles NW from Yakima, WA 10.7 <br />6/11/1987 3.0 15.3 miles NNW from Yakima, WA 10.0 <br />6/17/1985 3.0 8.2 miles NNW from Vantage, WA -0.2 <br />4/19/1985 3.2 14.0 miles SE from Ellensburg, WA 2.8 <br />1/30/1985 3.3 8.4 miles NNW from Vantage, WA -0.2 <br />1/8/1985 3.3 9.0 miles NNW from Vantage, WA -0.2 <br />8/23/1984 3.0 19.4 miles ESE from Skykomish, WA -0.03 <br />4/1/1984 4.3 8.9 miles S from Entiat, WA 4.4 <br />12/4/1983 3.2 9.2 mile WSW from Ellensburg, WA 6.8 <br />11/14/1983 3.8 5.8 miles NNW from Yakima, WA 4.4 <br />8/11/1983 3.1 6.3 miles ESE from North Bend, WA 7.3 <br />9/26/1982 3.4 25.6 miles W from Ellensburg, WA 1.4 <br />2/17/1981 4.2 21.5 miles NW from Ellensburg, WA 1.5 <br />4.6.4.6. Vulnerability and Impacts <br />Life Safety and Health: The entire population in Kittitas County is vulnerable to direct and indirect <br />impacts of a major earthquake in or around the planning area. The degree of exposure is dependent on <br />several factors (e.g., age and construction type of the structures people live in, the soil type the homes <br />are constructed on, their proximity to fault location). Whether directly or indirectly impacted, the entire <br />population will be vulnerable to the consequences of earthquakes to some degree. Business interruption <br />could keep people from working, road closures could isolate populations, and utility failures could impact <br />health and life safety of the population that suffered no direct damage from the actual event. <br /> <br />Property Damage and Critical Infrastructure: Earthquakes are capable of producing significant <br />damage to property and critical infrastructure, especially in built environments. Minor earthquakes can