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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Filter Total Items: 175939

Are the horizontal-to-vertical spectral ratios of earthquakes and microtremors the same? Are the horizontal-to-vertical spectral ratios of earthquakes and microtremors the same?

We consider the similarities and differences between earthquake and microtremor horizontal‐to‐vertical spectral ratios (eHVSR and mHVSR, respectively) using a dataset of 161 sites in southern California. Quantitative comparisons are made in terms of the eHVSR and mHVSR lognormal median curves, as well as the frequencies and amplitudes associated with the fundamental‐ and higher‐mode...
Authors
Joseph Vantassel, Makbule Ilgac, Adda Athanasopoulos Zekkos, Alan Yong, Behzad Hassani, Antony Martin
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Agricultural tile drains increase the susceptibility of streams to longer and more intense streamflow droughts Agricultural tile drains increase the susceptibility of streams to longer and more intense streamflow droughts

Streamflow droughts are receiving increased attention worldwide due to their impact on the environment and economy. One region of concern is the Midwestern United States, whose agricultural productivity depends on subsurface pipes known as tile drains to improve trafficability and soil conditions for crop growth. Tile drains accomplish this by rapidly transporting surplus soil moisture...
Authors
Seth Adelsperger, Darren Ficklin, Scott Robeson, Margaret Ann Zimmer, John C. Hammond, Damon M. Hall, J.P. Gannon
By
Maryland-Delaware-D.C. Water Science Center, Drought

GeoAI for science and the science of GeoAI GeoAI for science and the science of GeoAI

This paper reviews trends in GeoAI research and discusses cutting-edge ad- vances in GeoAI and its roles in accelerating environmental and social sciences. It ad- dresses ongoing attempts to improve the predictability of GeoAI models and recent re- search aimed at increasing model explainability and reproducibility to ensure trustworthy geospatial findings. The paper also provides...
Authors
Wenwen Li, Samantha T. Arundel, Song Gao, Michael F. Goodchild, Yingjie Hu, Shaowen Wang, Alexander Zipf
By
Core Science Systems Mission Area, Center of Excellence for Geospatial Information Science (CEGIS)

Population characteristics of silver carp from the source of their North American introduction in the Lower Mississippi River Population characteristics of silver carp from the source of their North American introduction in the Lower Mississippi River

Silver carp, Hypophthalmichthys molitrix, escaped into the Lower Mississippi River (LMR) over 50 years ago, established reproductive populations, and spread across much of the Mississippi River Basin. Demographic rates of silver carp are needed to inform decisions on control and management of this invasive species, but have not been published for the LMR. The purpose of this paper is to...
Authors
Kenneth J. Killgore, Jan J. Hoover, William T. Slack, James P. Kirk, Bradley R. Lewis, Steven G. George, Leandro E. Miranda
By
Cooperative Research Units

Chronology and Paleoenvironment of the Tunga Formation, a new lowermost Miocene sequence in the East Pisco Basin of southern Peru Chronology and Paleoenvironment of the Tunga Formation, a new lowermost Miocene sequence in the East Pisco Basin of southern Peru

The East Pisco Basin, occupying the coastal plain of Peru between 13°S and 16°S, is widely known for its extensive Eocene to Quaternary biosiliceous deposits and excellent preservation of fossil marine vertebrates. Biochronologic studies published over the past 35 years record a hiatus of about 13 million years (*32–19 Ma) separating the youngest Paleogene deposits (Otuma Formation) from...
Authors
Thomas J. Devries, John A. Barron, Diana Ochoa, Kristen McDougall
By
Ecosystems Land Change Science Program, Geology, Minerals, Energy, and Geophysics Science Center

Adaptation and Response in Drylands (ARID): Community insights for scoping a NASA terrestrial ecology field campaign in drylands Adaptation and Response in Drylands (ARID): Community insights for scoping a NASA terrestrial ecology field campaign in drylands

Dryland ecosystems cover 40% of our planet's land surface, support billions of people, and are responding rapidly to climate and land use change. These expansive systems also dominate core aspects of Earth's climate, storing and exchanging vast amounts of water, carbon, and energy with the atmosphere. Despite their indispensable ecosystem services and high vulnerability to change...
Authors
Andrew F. Feldman, Sasha C. Reed, Cibele Amaral, Alicja Babst-Kostecka, Flurin Babst, Joel A. Biederman, Charles Devine, Zheng Fu, Julia K. Green, Jessica Guo, Niall P. Hanan, Raymond F. Kokaly, Marcy Litvak, Natasha MacBean, David Moore, Dennis S. Ojima, Benjamin Poulter, Russell L. Scott, William K. Smith, Robert Swap, Compton J. Tucker, Lixin Wang, Jennifer D. Watts, Konrad Wessels, Fangyue Zhang, Wen Zhang
By
Ecosystems Mission Area, Southwest Biological Science Center, Geology, Geophysics, and Geochemistry Science Center
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