ABSTRACT

Ground Failure Triggered by Shaking During the November 30, 2018, Magnitude 7.1 Anchorage, Alaska, Earthquake   [open pdf - 15MB]

From the Introduction: "The magnitude (M) 7.1 Anchorage, Alaska, earthquake occurred at 8:29 a.m. local time on November 30, 2018, about 12 kilometers (km) north of Anchorage. The focal depth of about 47 km and the normal focal mechanism indicate that the earthquake occurred in the subducting slab of the Pacific Plate. The U.S. Geological Survey (USGS) ShakeMap (Worden and Wald, 2016) of this event (fig. 1) shows severe (intensity VIII) shaking near the epicenter; this caused significant damage in the urban and infrastructure center of Alaska and was felt throughout the Anchorage and Matanuska-Susitna Valley areas. The USGS Prompt Assessment of Global Earthquakes for Response (PAGER; Wald and others, 2010) system gave an 'orange' alert within an hour of the origin time, indicating estimated economic losses in the range of $100 million to $1 billion with few fatalities. No fatalities were reported following the 2018 Anchorage earthquake, but considerable damages to roads, railway alignments, and homes were observed throughout the epicentral region. The 2018 Anchorage earthquake was one of the most damaging earthquakes in the United States in the past decade."

Report Number:
Open-File Report 2020-1043
Author:
Publisher:
Date:
2020
Copyright:
Public Domain
Retrieved From:
US Geological Survey: https://usgs.gov/
Format:
pdf
Media Type:
application/pdf
URL:
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