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Arizona Earthquake
Information Center @ NAU Global Seismology and
Tectonics Group @ UofA Arizona Geological Survey USGS Earthquake Info AZ Shakes Blog Rapid Earthquake Viewer IRIS Seismic Monitor EarthScope USArray 1887 Great Sonoran Earthquake References
The Arizona Geological Survey has recently administered a Seismic Hazard Update for Arizona with support from FEMA. As part of this project, Jeff Lockridge, Matt Fouch and Ramon Arrowsmith analyzed earthquake information collected from the EarthScope USArray Transportable Array network that was installed across Arizona from March 2006 to April 2009 (see figure to right).
This study has identified approximately 1,000 earthquakes within Arizona during the three year period that the EarthScope USArray Transportable Array occupied the state, which increased the total historical earthquake catalog for Arizona by more than 50%. This new wealth of data resulted in the identification of several previously unidentified areas of seismic activity and suggests that most of the state is capable of producing small-magnitude earthquakes. The study also identified 16 earthquake clusters (groups of 10 or more earthquakes within a 2 km radius) that occurred throughout Arizona independent from regional geographic and geologic setting.
Density (shaded areas) and distribution of earthquakes (black dots) from historical and modern catalogs. Left panel displays events recorded by USArray stations from 2006 to 2009. Right panel contains all other earthquakes recorded in Arizona from 1830 to 2011.
All_AZ_EQs.kmz - Google Earth .kmz file containing the earthquake catalog recorded by USArray Transportable Array stations from March 2006 to April 2009 (white circles), and the entire historical Arizona event catalog from 1830 to April 2011 (red circles).
Allquakes Readme file - Provides information on how to best view earthquake information Google Earth.
Google Earth can be downloaded for free and is available for PC, Mac or Linux operating systems.
Seismicity within Arizona during the deployment of the EarthScope USArray Transportable Array - Master's Thesis by Jeff Lockridge - August 2011
Seismic Hazard Analysis for Phoenix/Scottsdale - Prepared by J. Ramon Arrowsmith - May 20, 2007
AZ Earthquake Info Powerpoint - Prepared by J. Ramon Arrowsmith
Probabilistic Seismic Hazard Assessment for Phoenix, AZ - Master's Thesis by Simon T. Ghanat - December 2008
Seismic stations installed within Arizona. Solid black squares represent stations associated with EarthScope USArray Transportable Array (2006-2009). White shapes represent semi-permanent seismic stations associated with regional and national networks. Black squares with superimposed white shapes represent either pre-existing stations included as part of USArray (stars and triangles) or stations adopted as part of the Arizona Broadband Seismograph network (circles). Boundaries between Arizona's three physographic provinces (CP-Colorado Plateau, ATZ-Arizona Transition Zone, B&R-Basin and Range) are denoted as dashed lines.
ASU School of Earth & Space Exploration
Last updated: September 8, 2011