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2025 Hazard Mitigation Plan <br />Kittitas County, Washington ffilffil <br />than 1,000 earthquakes occur in the state each year. A dozen or more are strong enough that people <br />feel ground shaking. The State has experienced at least 20 damaging events in the last 125 years.-1a3 <br />There have been three (3) earthquakes in the last 100 years that have caused damage in Washington. <br />These occurred in April 1949, April 1965, and February 2001. Although most of the damage occurred <br />west of the Cascade Range, reports of intensity MMI Vl were received from the City of Roslyn during the <br />Puget Sound April 1965 earthquake. Reports included cracked and collapsed chimneys, falling of small <br />objects and furnishing, vases, small objects, and furniture were overturned, rapid strong shaking that <br />lasted 45 seconds.-1aa <br />The Pacific Northwest Seismic Network has reported 55 earthquakes magnitude 3.0 or greater between <br />1971 and 2023. Table 4-53 lists past seismic events that have impacted Kittitas County with a magnitude <br />of 3.0 or greater since 1971 . <br />Table 4-53. Earthquake Past Events <br />143 Washington Emergency Management Division. (n.d.). Earthquake. Retrieved from <br />https://mi l.wa.gov/earthq uake. <br />1aa Washington State Department of Natural Resources. (1986). The Puget Lowland Earthquakes of 1949 and <br />1965. Retrieved from https://www.dnr.wa.qov/publications/qer ic8l puqetlowland eq_1949-65.pdf. <br />2.52t26t20173.2 22.2 miles WNW from Ellensburg, WA <br />1t22t2017 3.1 9.3 miles WNW from Hyak, WA 2.2 <br />10t1012016 3.1 7.4 miles SSE from Ellensburg, WA 4.8 <br />4.0 20.0 miles NNW from Ellensburg, WA 2.2211812015 <br />4.610t29t20133.1 26.2 miles NW from Entiat, WA <br />6t26t2013 4.2 24.4 miles NW from Entiat, WA 4.6 <br />9t13t2012 3.1 15.0 miles ESE from Wenatchee, WA 5.7 <br />0.83129120103.7 19.7 miles WNW from Ellensburg, WA <br />3.37124120063.1 1.9 miles SSE from Entiat, WA <br />5.76129120053.5 6.3 miles NW from Yakima, WA <br />1t14t2003 3.2 1.7 miles from Yakima, WA 6.3 <br />5.0 miles NNW from Entiat, WA 3.66t6t20023.4 <br />3.612t25t19993.0 2.1 miles SSE from Entiat, WA <br />gt3t1g97 3.3 3.0 miles NNW from Entiat, WA -0.3 <br />3.7 12.8 miles NNE from Yakima, WA -0.31t111997 <br />6.912117119953.1 4.6 miles S from Entiat, WA <br />6/30/1 995 3.0 7.5 miles NNE from Ellensburg, WA 6.4 <br />3/08/1 995 3.0 23.6 miles NW from Ellensburg, WA 0.7 <br />111311995 3.2 9.5 miles W from Yakima, WA 7.6 <br />Date Magnitude Distance From Depth <br />Chapter 4: Hazard ldentification and Risk Assessment 115