(a) Physics-based conduit model.  (b) Some depth-dependent properties inferred by solving the physics-based conduit model.  As magma ascends and depressurizes, the solid volume fraction increases due to crystallization, in part causing the velocity to change from viscous flow to frictional sliding.

Probing volcanic systems with Bayesian inversion using physics-based models


Science Nugget - By Paul Segall (Stanford University), Ying-Qi Wong (Stanford University), Kyle Anderson (U.S.G.S.) - NSF # EAR 1358607 | 2014-2017


A calving event at Yahtse Glacier in Icy Bay, Alaska, sends a seismic wave through the ice. Seismologists are using these seismic signals to determine when and why calving occurs. Photo by Tim Bartholomaus.

Calving Season


How EarthScope seismometers help track glacier breakdown
Turnagain Arm, Alaska

EarthScope National Meeting 2017


The last EarthScope National Meeting will be held in Anchorage, Alaska from May 16-18, 2017.

EarthScope Announcements


inSights Winter 2017
P208 in California. Credit UNAVCO

Salt Canyon, California


PBO Station P208 watches the grass grow...literally
The Alaska Transportable Array deployment coordinator, field operations managers, and station specialists. Photo credit: Maria Sanders, Jeremy Miner, and Ryan Bierma

The Alaska Transportable Array Team


Achieving Success in Challenging Environments
PBO monument P360 uses GPS technology to monitor snow depth in Island Park, Montana. This station, powered by a solar panel, is one of 100 used by researchers to measure snow depth using GPS. Credit: UNAVCO

Improving Snow-Depth Forecasting with EarthScope’s Plate Boundary Observatory


by Gail McCormick - Winter 2017

USA STEM Festival, 2016

Winter 2017 Education Corner


In every InSights issue, ESNO features two of the dozens of tools, modules, and activities that utilize EarthScope data to benefit a wide variety of users (K–12, university educators, informal programs like museums or after-school programs)
Photo by U.S. Coast Guard Lt. Cmdr. Nahshon Almandmoss Pavlof volcano erupts on March 28, 2016. The photo was taken looking northeast from a Coast Guard Hercules aircraft at 20,000 feet.

Volcano study examines relationship between seismic signals, sound waves


By Sue Mitchell - University of Alaska Fairbanks Press Release - January 17, 2017 (

A study of relationships between seismic signals and sound

Borehole strainmeter B030, Fall Creek, Oregon.

Fall Creek, Oregon


Borehole strainmeter B030 records slip around the world