Seismological Facility for the Advancement of Geoscience (SAGE)

What is SAGE?

Established in 2018, NSF’s Seismological Facility for the Advancement of Geoscience (SAGE) is a distributed, multi-user national facility operated by IRIS that provides state of-the-art seismic and related geophysical instrumentation and services to support research and education in the geosciences. This integrated set of facility capabilities enables advances in our understanding of Earth structure and dynamics, earthquakes and volcanic eruptions, and interactions between the solid Earth, hydrosphere, and atmosphere through the management and operation of:

Data Services

SAGE Data Services (DS) is the world’s largest facility for the archiving, curation, and distribution of seismological and other geophysical research data and data products.

SAGE DS goals include:

Global Seismographic Network

A multi-use facility, the 152-station Global Seismographic Network (GSN) supports basic research into global seismicity and Earth structure as well as earthquake hazard mission-related tasks such as earthquake location and characterization, tsunami warning, and nuclear explosion monitoring. IRIS and the IDA group at the University of California San Diego operate 40 of the GSN stations as part of SAGE, in partnership with the U.S. Geological Survey.

GSN activities continue to focus on optimizing and maintaining high station performance by:

Working with the community, SAGE is updating GSN design goals to reflect new science objectives and to incorporate new technologies.


The SAGE PASSCAL facility maintains the world’s largest open access, shared-use pool of portable seismic sensors and a wide range of associated equipment. This capability is essential for both PI-driven seismic data acquisition projects and larger community experiments, and supports education and workforce development projects in the geosciences.

The primary activities of the SAGE PASSCAL facility are:


Magnetotelluric (MT) studies record Earth’s ambient electric and magnetic fields to characterize the conductivity of the shallow crust to upper mantle. These distinct observations help to enhance and discriminate results obtained from seismic imaging methods. Under the SAGE award, a new pool of portable MT instruments to support PI-driven experiments has been established at the PASSCAL Instrument Center.

The SAGE PASSCAL MT facility is:

Education and Public Outreach

Through its commitment to advance awareness and understanding of geophysics while inspiring Earth science careers, SAGE Education and Public Outreach (EPO) strives to engage educators and students of all ages, especially those from groups that are traditionally underrepresented in the geosciences.

SAGE EPO focuses on: