![Figure 2 from Wang and Tkalčić [2021]](https://eos.org/wp-content/uploads/2022/01/2021GL094784-Figure-2-sized-1200x675-1.png)
Coda-correlation wavefields reveal direction-dependent inner-core shear-wave speed, ~5 s faster in directions oblique to the Earth’s rotation axis than directions parallel to the equatorial plane.
seismology
Posted inScience Updates
Sensing Iceland’s Most Active Volcano with a “Buried Hair”
Distributed acoustic sensing offered researchers a means to measure ground deformation from atop ice-clad Grímsvötn volcano with unprecedented spatial and temporal resolutions.
Posted inResearch Spotlights
How Fault Surface Features Can Tell Us About Future Earthquakes
A new study suggests ways to quantify fault maturity, a property that affects earthquake characteristics.
Posted inNews
Can Uranus’s Rings Reveal the Planet’s Deepest Secrets?
Planetary rings can act as seismometers that respond to changes deep within a planet.
Posted inResearch Spotlights
Faulting and Folding Signals in Seismic Data
A novel numerical model simulates folding in Earth’s crust throughout the earthquake cycle.
Posted inResearch Spotlights
Improving Coseismic Slip Measurements
A physics-based method estimates the duration of earthquakes’ coseismic phase and can help improve the precision of coseismic slip models and magnitude estimates.
Posted inNews
Mars from the InSight Out
There’s a seismometer on Mars, and it’s been busy! Download our free illustrated poster.
Posted inResearch Spotlights
Unearthing the Cause of Slow Seismic Waves in Subduction Zones
Researchers look to the fossil rock record to unearth the driving forces for variable seismic speed through subduction zones.
Posted inResearch Spotlights
Seismology: A Promising Tool for Monitoring Permafrost
Passive seismic data from a station atop Germany’s highest peak reveal a 15-year record of permafrost degradation, suggesting that this technique could be used for long-term environmental monitoring.
Posted inNews
Summer Could Be Earthquake Season on Mars
InSight data hint that shifting carbon dioxide ice loads, illumination changes, or solar tides could drive an uptick in marsquakes during northern summer—a “marsquake season.”