Seismology on Ice!

Follow the adventures of Dr. Bob Woodward, the Director of IRIS Instrumentation Services, as he travels to Antarctica to do "Seismology on Ice"! Continue Reading

Reflections on the Accomplishments of EarthScope’s USArray

The USArray has operated for over 15 years as a community science facility designed to address EarthScope’s goal of understanding the structure and evolution of the North American continent. Continue Reading

IRIS PASSCAL to Expand Pool of Seismic Instruments

IRIS has begun the procurement of 460 Fairfield nodes for general PASSCAL pool use. The new nodes should be ready for general usage starting in February 2019 (bringing the general node pool to 533 units). Continue Reading


Apr 11 Educators - Learn about Earthquakes at NSTA
St. Louis
Apr 17 2019 Spring BoD Meetings
Washington, DC
Jul 16 IRIS/SSA Distinguished Lectureship Series
Oregon Museum of Science and Industry, Empirical Theater (Portland,Oregon)
Oct 18 IRIS/SSA Distinguished Lectureship Series
Southwestern Oregon Community College (Coos Bay,Oregon)
Nov 13 2019 Fall BoD Meetings
Fort Collins, Colorado
Earthquake Resources

NEW ANIMATION! Foreshock, mainshock or aftershock?

Large earthquakes are usually followed by hundreds and even thousands of smaller earthquakes, called aftershocks. In some earthquake sequences, a smaller earthquake called a “foreshock”, precedes the mainshock.

¡Animación de la tectónica de placas ahora en español!

Placas Tectónicas: ¿Que son las Placas (litosféricas) tectónicas?

Investigating “man-made quakes” in Western Canada

Investigating “man-made quakes” in Western Canada

In the US, most induced earthquakes are the result of wastewater injection, whereas in western Canada, induced earthquakes are more closely correlated with hydraulic fracturing operations. Why do some areas experience induced earthquakes while others remain seismically inactive?
A subduction zone in pieces: the segmented Cascadia megathrust

A subduction zone in pieces: the segmented Cascadia megathrust

Onshore and offshore seismic data informs researchers working on megathrust boundaries, improving our understanding of where subduction zone earthquakes might occur and why.
Seismic Study Reveals Huge Amount of Water Dragged into Earth’s Interior

Seismic Study Reveals Huge Amount of Water Dragged into Earth’s Interior

Slow-motion collisions of tectonic plates under the ocean drag about three times more water down into the deep Earth than previously estimated, according to a first-of-its-kind seismic study by researchers at Washington University in St. Louis.