The researchers point out a major difference between the focal mechanisms of the massive tremblors that led to this fact. According to prediction modeling and the magnitude of the earthquake, a larger number of landslides was anticipated. Researchers concluded that the deep landslides triggered by the 1964 tremblor were not re-activated as the recent seismic shock had a lower duration and higher frequency.īy examining this phenomenon, scientists came to an interesting conclusion about the 2018 earthquake. The research team visited the affected region some days after the 2018 shock to record the ground failures including cracks, landslides and liquefaction phenomena. Geological Survey (USGS) and lead author of the study, some cracks appeared on the regions where landslides occurred back in 1964 but the shaking was not intense enough to cause any significant movement. It was the strongest tremblor the region has experienced since the 1964 incident, the most powerful ever recorded in the United States.Īccording to Dr. According to a new study, published in Seismological Research Letters, the deep landslides that were triggered by the massive M 9.2 Alaska earthquake in 1964 were not re-activated by the M 7.1 earthquake that hit Anchorage on November 30, 2018.Ībout a year ago, Alaska's largest city was struck by a massive earthquake that caused significant infrastructure damage but, fortunately, no casualties.
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