[unav_all] Napa earthquake teaching resources

Beth Pratt-Sitaula prattsitaula at unavco.org
Tue Jan 6 14:46:31 MST 2015

Hello Everyone

We want to draw your attention to a new teaching resource for using Napa earthquake inter- and co-seismic GPS data <http://www.unavco.org/education/resources/educational-resources/lesson/majors-gps-strain/napa/napa.html>  It was developed and tested by UNAVCO community members Phil Resor and Vince Cronin (technical support by Bill Hammond) as an extension of their GPS-Strain module <http://www.unavco.org/education/resources/educational-resources/lesson/majors-gps-strain/majors-gps-strain.html> for undergraduate structural geology and geophysics students.

The 2014 South Napa earthquake provides an excellent example for studying crustal strain associated with the earthquake cycle of a strike-slip fault with clear societal relevance. The largest earthquake in the California Bay Area in 25 years, the South Napa earthquake caused hundreds of injuries and over $400 million in damages. It was the first large earthquake (Mag 6) to occur within the Plate Boundary Observatory GPS network since installation. This activity uses a single triangle of GPS stations (P198, P200, SVIN), located to the west of the earthquake epicenter, to estimate both the interseismic strain rate and coseismic strain. By the end of the exercise, the students also have direct evidence that considering the recurrence interval on a single fault, which is part of a larger system, is not reasonable.

Beth Pratt-Sitaula, PhD
UNAVCO Science Education Specialist
prattsitaula at unavco.org | 509-899-3480 | www.unavco.com

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