PDF documents opened from yourīrowser may not display or print as intended. The documents to your computer and open them with Adobe Reader. For best results viewing and printing PDF documents, it is recommended that you download Part or all of this report is presented in Portable Document Format Ground failure triggered by shaking during the November 30, 2018, magnitude 7.1 Anchorage, Alaska, earthquake Geological Survey Open-File Report 2020–1043, 21 p. Grant, A.R.R., Jibson, R.W., Witter, R.C., Allstadt, K.E., Thompson, E.M., and Bender, A.M., 2020, Ground failure triggered by shaking during the November 30, 2018, magnitude 7.1 Anchorage, Alaska, earthquake: U.S. A large rockfall observed on December 1 on Rainbow Peak was not observed during a subsequent December 5 overflight because of snow cover, which suggests that the general lack of observations of landsliding within the Chugach Mountains is uncertain. Notably, substantial liquefaction features at the mouths of the Little Susitna River (December 1) and Ingram Creek (December 5) were absent during subsequent overlapping missions (December 6 and 9, respectively) because of tidal action. Tidal erosion, fresh snowfall, limited daylight, and adverse flying conditions contributed significantly to the uncertainty and incompleteness of ground-failure observations during this reconnaissance. Field-mapped ground-failure observations have been augmented with a set of 565 georeferenced and annotated images from both field and overflight reconnaissance cataloging additional ground-failure presence or absence from the Anchorage earthquake. Overflight observations (December 1–6) documented landslide and liquefaction presence or absence within the Chugach Mountains and along Cook Inlet in regions inaccessible to vehicles, which greatly expanded the geographic scope of this reconnaissance. This is not a complete inventory and simply shows general trends and examples of types and distribution of ground failures documented. This inventory of 153 features is from ground-based observations soon after the earthquake (December 5–10) that include the presence or absence of liquefaction, landslides, and individual crack traces of lateral spreads and incipient landslides. You will find extensive lists with links to details for each event, statistics, and interactive maps.We developed an initial inventory of ground failure features from the November 30, 2018, magnitude 7.1 Anchorage earthquake. You can browse current and past earthquakes for the whole world, or specific countries, regions or areas you define yourself. The AllQuakes website and Volcanoes&Earthquakes App both provide a way to visualize and analyze seismic events in near real time. It currently contains data for about 10 million earthquakes since 1900. Our database is one of the most up to date and complete in the world.

In addition, we analyze user-generated shaking reports to detect many earthquakes in areas with poor instrumental coverage or detect quakes even before they are published by monitoring agencies. This is why we continuously collect, aggregate, and compare earthquake data from more than 50 international and national data centers around the world in near real time. No single seismic network is able to monitor all quakes that occur in the world. Our goal is to present you with the best available quake data. About our data This site was created and is being maintained by a small passionate team of earth scientists enthusiastic about volcanism and earthquakes.

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