15 years

Fifteen Years of Earth Science Exploration


The EarthScope National Office
location of speaker series

Education Corner: Final inSights Issue


Sharing Science through the EarthScope Speaker Series and Save the Date for the EarthScope Legacy Education and Outreach Virtual Workshop
SAFOD scientists and core sample

San Andreas Fault Observatory at Depth


The Gold Standard for Scientific Drilling Through an Active, Continental Transform Fault


EarthScope video intro

New EarthScope Video!


15 Years of Geoscience Discovery and Education in North America
top 10

EarthScope Top 10 Discoveries




Looking up from below and northward along the San Andreas fault zone in the vicinity of the SAFOD core. The drill site, marked by a star, is projected on the green and tan ground surface. Multiple strands of the San Andreas fault are mapped with black lines. The red path of the main SAFOD line intersects the fault at depth, where numerous earthquakes (shown as white balls) happen continuously. (Image from L. Blair, U.S. Geological Survey)

Tracking the Fluids in a Weak Fault


EarthScope’s San Andreas Fault Observatory at Depth reveals the pathways of fluids carried along the fault’s fracture network


Earthscope Globe

Fluid Pressure Spikes in SAFOD Rocks as Evidence of Microseismicity


The San Andreas Fault (SAF) deforms by permanent creep and microseismicity in central California. Higher-thanhydrostatic fluid pressures, which could explain low strength and creep, were not detected during the San Andreas Fault Observatory at Depth (SAFO