Using the program FPFIT [Reasenberg and Oppenheimer, 1985], Ratchkovski et al. The earthquake lasted about 100 seconds. The criteria consisted of location, type, and amount of fault displacement at the Denali and other fault crossings. According to Ford, “The Denali Fault earthquake was the ‘big one’ for Alaska.” The cracks in the Earth’s surface along parts of the fault were up to 6.7 meters (22 feet) wide, which would have caused considerable damage to a more heavily populated area, such as California. The 1964 Good Friday Earthquake is an example. Fortunately, no one was seriously injured, due to the small population located Investigating the seismic response of regular and irregular urban structures can provide useful information for input to any preparedness plan. To monitor seismic activity, staff from the Alaska Earthquake Information Center (AEIC) install and operate seismic stations across the state. Earthquakes cause lots of damage to property and even result in deaths. [2004] determined focal mechanisms for earthquakes before and after the Denali fault earthquake, then estimated Proceedings of the Sixth U.S. Conference and Workshop on Lifeline Earthquake Engineering, TCLEE 2003: Advancing Mitigation Technologies and Disaster Response, held in Long Beach, California, August 10-13, 2003. However, full ANSS instrumentation on either end of the 2002 rupture is critical if this goal is to be achieved. Although people tend to view the Earth as static and stable between earthquakes, every point is actually moving slowly as Earth’s tectonic plates move around. On November 3, 2002 a devastating earthquake rattled Alaska. Even several years after the earthquake, average speeds remain several times higher than the pre-earthquake rates at many sites. Alaska is the most geologically active part of the United States. Although the fault there shifted about 14 feet, the pipeline did not break, averting a major economic and environmental disaster. Areas affected by liquefaction are largely confined to Holocene alluvial deposits, man-made embankments, and backfills. However, the duration of shaking associated with a magnitude 9.2 mega-thrust earthquake would be longer, and this is also factored into the seismic evaluations. Edwards, M. Rahman, H. Ryu, ... the second was close to the community of Mundaring east of the Darling fault. The earthquake began about 80 km (50 miles) east of the Denali Visitor Center, and ruptured eastward along the Denali Fault, and was followed by thousands of aftershocks. The AEIC located over 1,000 aftershocks of the M 6.7 event prior to the M 7.9 mainshock and over 35,000 aftershocks through the end of 2004. A major earthquake along the fault could cause the pipeline to rupture, spilling crude oil into the surrounding environment. As the effects of the 2002 earthquake continue to dissipate, continued measurements of GPS sites in and around the park will provide an invaluable record of how the crust and mantle in central Alaska behave. Postseismic deformation results from different physical processes, including continued slip on the fault plane or its deeper extension and viscous flow in the Earth’s mantle. Hazard estimates have important implications for society, providing a basis for building codes, insurance rate structures, risk assessments, and public policies to mitigate earthquake risk. In the months that followed, roughly 25,000 aftershocks were located on the Denali and Totshunda faults, revealing a surface rupture that was 325 km (200 miles) long. ... slightly larger than the magnitude 9.0 Sumatra-Andaman Islands earthquake that devastated northern Sumatra in December 2004 and generated a tsunami that killed more than 280,000 people. The AEIC located over 1,000 aftershocks of the M 6.7 event prior to the M 7.9 mainshock and over 35,000 aftershocks through the end of 2004. of the Denali fault earthquake, with clockwise rotation ranging from about 14 in the western part of the rupture to as much as 38 in the eastern part. Earthquake forecasting and prediction is an active topic of geological research. Major earthquakes (those with a magnitude range of 7.0-7.9) occur where a significant amount of stress has accumulated prior to being released—along a plate boundary or along major faults. The epicenters (point on the earth surface where the quakes originate) of each of these large earthquakes was about 50 km (30 miles) east of the park, on the Denali fault. Large earthquakes often cause considerable damage to infrastructure and structures. Slow deformation between earthquakes, and mitigating risk in the 2004 denali fault earthquake at shear zones where smaller crustal blocks shifting... 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