Earthquake Hazards
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The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. We undertake these activities as part of the larger National Earthquake Hazards Reduction Program (NEHRP), a four-agency partnership established by Congress.
Latest Earthquakes
Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Check out the new interface! (7/27/20)
Did You Feel It?
Earthquake Notification Service (ENS)
ShakeAlert® Earthquake Early Warning
Listening to the Earth at the South Pole
If you want to listen to the softest whispers of the Earth, the South Pole is where you want to be. Seismic station, QSPA has been allowing us to eavesdrop on the Earth for over six decades, and it may soon gain the equivalent of hearing aids.
Read the StoryAlaska Peninsula Earthquake Sequences of 2020-2021
Explore this interactive geonarrative summary of the earthquake sequence in the Alaska Peninsula during 2020 and 2021.
ExploreNews
ShakeOut 2021: Earthquake Awareness Enables Community Preparedness
Get ready to shake it like it’s real! ShakeOut 2021: Drop (or Lock), Cover, and Hold On!
The Monitor newsletter - Vol. 4 | Issue Fall 2021
In this issue: Kīlauea Volcano eruption, geomagnetism hazards, debris flow reports, benefits of coral reefs.
Opportunity to Provide Feedback for SZ4D Program
To those interested in USGS SZS and the SZ4D Initiative (Subduction Zones in Four Dimensions)...
Publications
Electrical properties of carbon dioxide hydrate: Implications for monitoring CO2 in the gas hydrate stability zone
CO2 and CH4 clathrate hydrates are of keen interest for energy and carbon cycle considerations. While both typically form on Earth as cubic structure I (sI), we find that pure CO2 hydrate exhibits over an order of magnitude higher electrical conductivity (σ) than pure CH4 hydrate at geologically relevant temperatures. The...
Stern, Laura A.; Constable, S.; Lu, Ryan; Du Frane, Wyatt L.; Roberts, J. Murray NGA-East Ground-Motion Characterization model part I: Summary of products and model development
In this article, we present an overview of the research project NGA-East, Next Generation Attenuation for Central and Eastern North America (CENA), and summarize the key methodology and products. The project was tasked with developing a new ground motion characterization (GMC) model for CENA. The final NGA-East GMC model includes a set of 17...
Goulet, Christine A.; Bozorgnia, Yousef; Kuehn, Nicolas; Al Atik, Linda; Youngs, Robert; Graves, Robert; Atkinson, Gail M. Coastal Tree-Ring Records for Paleoclimate and Paleoenvironmental Applications in North America
For more than a century, tree-ring research has identified relationships between climatic and ecological conditions and tree growth to describe past environments and constrain future ecosystem vulnerabilities. Tree-ring records are frequently used as environmental proxies that extend knowledge of past climate and ecology on millennial scales. Many...
Tucker, Clay; Pearl, Jessie Kathleen