Articles | Earthscope

2019

Fifteen Years of Earth Science Exploration

SAFOD, Science, Science Nuggets, USArray, PBO, Newsletters, Education

2019-02-14

The EarthScope National Office

EarthScope Announcements

Science, Science Nuggets, Newsletters, Education

2019-02-13

inSights Final Issue February 2019

2018

New EarthScope Video!

SAFOD, Science, Science Nuggets, USArray, PBO

2018-12-12

15 Years of Geoscience Discovery and Education in North America

EarthScope Announcements

Science, Science Nuggets, USArray, PBO, Newsletters, Education, Announcements

2018-05-04

inSights Spring 2018

EarthScope Announcements

Science, Science Nuggets, USArray, Newsletters, Education, Announcements

2018-01-29

inSights Winter 2017-18

2017

Spatial variation in slip rate during 1984-1998 inferred from characteristically repeating microearthquakes. The 1989 Loma Prieta earthquake led to a long-term acceleration of fault slip. The yellow star is the 1998 Mw 5.1 SJB earthquake.

Creeps and starts on the San Andreas fault near San Juan Bautista

Science Nuggets, PBO

2017-11-10

Want to dig deeper? Click on the "advanced" button in the article for scientific details.

Access to SALMON station SALA in western Cook Inlet, showing challenging conditions. At high tide, all the rocks in view are underwater. Here a three-wheeler pulling a trailer is being driven onto the boat at a falling tide. Note the typical bluffs in the background; these bluffs posed challenging access to sites on top.(Credit C.Tape)

By road, boat, plane and helicopter: Creating a remote seismic measurement network

Science Nuggets, USArray

2017-10-03

Want to dig deeper? Click on the "advanced" button in the article for scientific details.

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

Probing volcanic systems with Bayesian inversion using physics-based models

Science, Science Nuggets

2017-04-24

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

2016

Teleseismic P-wave cross-section (Humphreys et al., 2015), with Rayleigh wave image of crust (Shen et al., 2013). Wyoming high-velocity mantle extends to ~300 km.

Recent Craton Growth by Under-accreting an Ocean Plateau Beneath Wyoming

Science, Science Nuggets

2016-09-20

Science Nugget - By Eugene Humphreys (University of Oregon Eugene) and Robert van der Hilst (MIT) - NSF # EAR 952194 | 2010-2012

Seismic tomography images high-velocity…

Crustal Strength Profiles Across the Brittle-Ductile Transition

Science Nuggets

2016-09-20

Science Nugget - By John Platt (University of Southern California) and W. M. Behr (University of Texas Austin) - NSF EAR # 0809443 | 2008-2012

In this project we…

Vertical velocities predicted by model selection (statistical, s-model) using GPS data and the best-fitting physical deformation model (p- model) simulating the vertical crustal response of earthquake cycle loading at depth throughout the past 300 or more years.

The Vertical Fingerprint of Earthquake Cycle Loading in Southern California

Science Nuggets, PBO

2016-09-19

Science Nugget - By Bridget Smith-Konter (University of Hawaii at Manoa), David Sandwell (Scripps Institution of Oceanography), Xiaopeng Tong (University of Washington…

Sliced view of present-day (calendar year 2011) Coulomb stress accumulation model of the San Andreas Fault System based on interseismic stress accumulation rate model.

Locked, Loaded and Looming?

Science Nuggets, PBO

2016-09-19

Exploring earthquake cycle stress history of seismically active faults of the San Andreas Fault System

Figure 1. About 16,000 pairs of shear wave splitting parameters in the study area. The orientation of the red bars represents the fast polarization direction, and the length is proportional to the splitting time (Liu et al., 2014).

Mantle Anisotropic Structure and Dynamics Beneath the Western United States

Science Nuggets, USArray

2016-09-19

Constraints from Shear-wave Splitting Analysis

Seismic velocity in the Earth along the slice BB’. Red area contains material with low velocities that is rising up from deep in the Earth.

Hot, Wet Mantle Below the New Madrid Seismic Zone

Science Nuggets, USArray

2016-09-19

Science Nugget - By Charles Langston (University of Memphis), Christine Powell (University of Memphis), Steve Horton (University of Memphis), Heather Deshon (Southern Methodist…,

Lights, Cameras, Action!

Science Nuggets, Education

2016-09-19

EarthScope Stories Chronicled on Video

spatial and temporal variations in fault slip near the 1998 Mw 5.1 earthquake that is the largest instrumentally observed earthquake in the San Juan Bautista area (Taira et al., 2014)

Imaging of Slow Fault Movements with Microearthquakes

Science Nuggets

2016-09-19

Variability of Fault Slip Behavior Along the San Andreas Fault in the San Juan Bautista Region

Uppermost mantle isotropic velocity structure beneath USArray from Pn tomography.

Uppermost mantle seismic velocity structure beneath USArray

Science, Science Nuggets

2016-09-19

Science Nugget - By Jeanine Buehler (University of California San Diego) and Peter Shearer (University of California San Diego) - NSF EAR # 1358510 | 2014

We…