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Robert E Anthony

Robert Anthony is a Research Geophysicist in the Earthquake Hazards Program.

Science and Products

Filter Total Items: 60

Revisiting seismological discoveries of the inner core Revisiting seismological discoveries of the inner core

Seismology has been used as a tool for understanding the current physical properties of the interior of the Earth and its dynamic evolution with remarkable success over the last century. Much of this progress is due to the ever‐expanding set of high‐quality quantitative observations of teleseismic waveforms recorded at seismographic stations worldwide. In this work, we revisit historical
Authors
Adam T. Ringler, Pritwiraj Moulik, Thomas A. Lee, David C. Wilson, Robert E. Anthony
By
Geologic Hazards Science Center

A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days

Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland...
Authors
Kristian Svennevig, Steven P. Hicks, Thomas Forbriger, Thomas Lecocq, Ruedi Widmer-Schnidrig, Anne Mangeney, Clément Hibert, Niels J. Korsgaard, Antoine S. Lucas, Claudio Satriano, Robert E. Anthony, Aurélien Mordret, Sven Schippkus, Søren Rysgaard, Wieter Boone, Steven Gibbons, Kristen L. Cook, Sylfest Glimsdal, Finn Løvholt, Koen Van Noten, Jelle D. Assink, Alexis Marboeuf, Anthony Lomax, Kris Vanneste, Taka’aki Taira, Matteo Spagnolo, Raphael de Plaen, Paula Koelemeijer, Carl Ebeling, Andrea Cannata, William D. Hardcourt, David G. Cornwell, Corentin Caudron, Piero Poli, Pascal Bernard, Eric Larose, Eleonore Stutzmann, Peter H. Voss, Bjorn Lund, Flavio Cannavo, Manuel J. Castro-Díaz, Esteban J. Chaves, Trine Dahl-Jensen, Nicolas De Pinho Dias, Aline Deprez, Roeland Develter, Douglas Dreger, Laslo G. Evers, Enrique D. Fernández-Nieto, Ana M.G. Ferreira, Gareth J. Funning, Alice-Agnes Gabriel, Marc Hendrickx, Alan L. Kafka, Marie Keiding, Jeffrey T. Kerby, Shfaqat A. Khan, Andreas Kjær Dideriksen, Oliver D. Lamb, Tine B. Larsen, Bradley Lipovsky, Ikha Magdalena, Jean-Philippe Malet, Mikkel Myrup, Luis Rivera, Eugenio Ruiz-Castillo, Selina Wetter, Bastien Wirtz
By
Geologic Hazards Science Center

Preface to focus section on new frontiers and advances in global seismology Preface to focus section on new frontiers and advances in global seismology

Over the last century, many of the fundamental advances in our understanding of the solid Earth have been underpinned by seismic observations recorded on long‐running networks of globally distributed seismic instruments (e.g., Agnew et al., 1976; Romanowicz et al., 1984; Hanka and Kind, 1994; Peterson and Hutt, 2014; Ringler et al., 2022a). During this time, seismic data quality and the...
Authors
Robert E. Anthony, Nicolas Leroy, Robert Mellors, Adam T. Ringler, Joachim Saul, Martin Vallee, David C. Wilson
By
Geologic Hazards Science Center

Background seismic noise levels among the Caribbean network and the role of station proximity to coastline Background seismic noise levels among the Caribbean network and the role of station proximity to coastline

The amplitude and frequency content of background seismic noise is highly variable with geographic location. Understanding the characteristics and behavior of background seismic noise as a function of location can inform approaches to improve network performance and in turn increase earthquake detection capabilities. Here, we calculate power spectral density estimates in one‐hour windows...
Authors
Justin T. Wilgus, Adam T. Ringler, Brandon Schmandt, David C. Wilson, Robert E. Anthony
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Global seismic networks operated by the U.S. Geological Survey Global seismic networks operated by the U.S. Geological Survey

The U.S. Geological Survey (USGS) Global Seismographic Network (GSN) Program operates two thirds of the GSN, a network of state‐of‐the‐art, digital seismological and geophysical sensors with digital telecommunications. This network serves as a multiuse scientific facility and a valuable resource for research, education, and monitoring. The other one third of the GSN is funded by the...
Authors
David C. Wilson, Charles R. Hutt, Lind Gee, Adam T. Ringler, Robert E. Anthony
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Increasing ocean wave energy observed in Earth’s seismic wavefield since the late 20th century Increasing ocean wave energy observed in Earth’s seismic wavefield since the late 20th century

Ocean waves excite continuous globally observable seismic signals. We use data from 52 globally distributed seismographs to analyze the vertical component primary microseism wavefield at 14–20 s period between the late 1980s and August 2022. This signal is principally composed of Rayleigh waves generated by ocean wave seafloor tractions at less than several hundred meters depth, and is...
Authors
Richard C. Aster, Adam T. Ringler, Robert E. Anthony, Thomas A. Lee
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Comment on “A new decade in seismoacoustics (2010–2022)” by Fransiska Dannemann Dugick, Clinton Koch, Elizabeth Berg, Stephen Arrowsmith, and Sarah Albert Comment on “A new decade in seismoacoustics (2010–2022)” by Fransiska Dannemann Dugick, Clinton Koch, Elizabeth Berg, Stephen Arrowsmith, and Sarah Albert

An increase in seismic stations also having microbarographs has led to increased interest in the field of seismoacoustics. A review of the recent advances in this field can be found in Dannemann Dugick et al. (2023). The goal of this note is to draw the attention of the readers of Dannemann Dugick et al. (2023) to several additional interactions between the solid Earth and atmosphere...
Authors
Adam T. Ringler, Robert E. Anthony, Brian Shiro, Toshiro Tanimoto, David C. Wilson
By
Natural Hazards Mission Area, Earthquake Hazards Program, Volcano Hazards Program, Geologic Hazards Science Center, Volcano Science Center

Comparison of co-recorded analog and digital systems for characterization of responses and uncertainties Comparison of co-recorded analog and digital systems for characterization of responses and uncertainties

One of the most prominent challenges related to legacy seismic data is determining how these data can be appropriately used in modern research applications. The wide variety of instrumentation used in the analog era, the format of recording on paper wrapped around a helicorder drum, and limited metadata information introduces ambiguities that are not typical of modern digital data...
Authors
Thomas A. Lee, Adam T. Ringler, Robert E. Anthony, Miaki Ishii
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Introduction to the digitization of seismic data: A user’s guide Introduction to the digitization of seismic data: A user’s guide

Modern seismic data are collected, distributed, and analyzed using digital formats, and this has become a standard for the field. Although most modern seismometers still make use of analog electronic circuits, their data are converted from an analog voltage output to time‐tagged counts by way of digitization. Although much of the digitization process is not complicated to conceptualize...
Authors
Adam T. Ringler, Robert E. Anthony, Patrick Bastien, Adam Pascale, Bion J. Merchant
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Earth’s upper crust seismically excited by infrasound from the 2022 Hunga Tonga–Hunga Ha’apai eruption, Tonga Earth’s upper crust seismically excited by infrasound from the 2022 Hunga Tonga–Hunga Ha’apai eruption, Tonga

Records of pressure variations on seismographs were historically considered unwanted noise; however, increased deployments of collocated seismic and acoustic instrumentation have driven recent efforts to use this effect induced by both wind and anthropogenic explosions to invert for near‐surface Earth structure. These studies have been limited to shallow structure because the pressure...
Authors
Robert E. Anthony, Adam T. Ringler, Toshiro Tanimoto, Robin Matoza, Silvio De Angelis, David C. Wilson
By
Natural Hazards Mission Area, Geologic Hazards Science Center

The global seismographic network reveals atmospherically coupled normal modes excited by the 2022 Hunga Tonga eruption The global seismographic network reveals atmospherically coupled normal modes excited by the 2022 Hunga Tonga eruption

The eruption of the submarine Hunga Tonga-Hunga Haʻapai (Hunga Tonga) volcano on 15 January 2022, was one of the largest volcanic explosions recorded by modern geophysical instrumentation. The eruption was notable for the broad range of atmospheric wave phenomena it generated and for their unusual coupling with the oceans and solid Earth. The event was recorded worldwide across the...
Authors
Adam T. Ringler, Robert E. Anthony, Rick Aster, T. Taira, Brian Shiro, David C. Wilson, S. H. De Angelis, C. Ebeling, Matthew M. Haney, R. Matoza, H. Ortiz
By
Natural Hazards Mission Area, Volcano Hazards Program, Geologic Hazards Science Center, Volcano Science Center

Achievements and prospects of global broadband seismographic networks after 30 years of continuous geophysical observations Achievements and prospects of global broadband seismographic networks after 30 years of continuous geophysical observations

Global seismographic networks (GSNs) emerged during the late nineteenth and early twentieth centuries, facilitated by seminal international developments in theory, technology, instrumentation, and data exchange. The mid- to late-twentieth century saw the creation of the World-Wide Standardized Seismographic Network (1961) and International Deployment of Accelerometers (1976), which...
Authors
Adam T. Ringler, Robert E. Anthony, R. C. Aster, C. J. Ammon, S. Arrowsmith, Harley M. Benz, C. Ebeling, A. Frassetto, W. Y. Kim, Paula Koelemeijer, H. C. P. Lau, V. Lekic, J. P. Montagner, P. G. Richards, D. P. Schaff, M. Vallee, William L. Yeck
By
Natural Hazards Mission Area, Geologic Hazards Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

ASL Sensor Test Suite ASL Sensor Test Suite

This program is used to analyze various aspects of seismic sensor data in order to determine information about their configuration, such as gain and orientation.
The Loneliest Seismometers on Earth

The Loneliest Seismometers on Earth

The USGS Albuquerque Seismological Observatory is partnering with the IceCube Neutrino Observatory, University of Wisconsin-Madison, and the National...

Read Article
Deep Ice Seismometer Thumbnail Deep Ice Seismometer Thumbnail
World's deepest seismometer braces the South Pole!
Deep Ice Seismometer Thumbnail

World's deepest seismometer braces the South Pole!

World's deepest seismometer braces the South Pole!

Get ready to journey to the bottom of the world! The Deep Ice Seismometer is a groundbreaking new tool that will revolutionize how we monitor earthquakes across the globe. Developed through a powerful collaboration between the U.S.

By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center
Deep Ice Seismometer Thumbnail

World's deepest seismometer braces the South Pole!

World's deepest seismometer braces the South Pole!

Get ready to journey to the bottom of the world! The Deep Ice Seismometer is a groundbreaking new tool that will revolutionize how we monitor earthquakes across the globe. Developed through a powerful collaboration between the U.S.

By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Science and Products

Filter Total Items: 60

Revisiting seismological discoveries of the inner core Revisiting seismological discoveries of the inner core

Seismology has been used as a tool for understanding the current physical properties of the interior of the Earth and its dynamic evolution with remarkable success over the last century. Much of this progress is due to the ever‐expanding set of high‐quality quantitative observations of teleseismic waveforms recorded at seismographic stations worldwide. In this work, we revisit historical
Authors
Adam T. Ringler, Pritwiraj Moulik, Thomas A. Lee, David C. Wilson, Robert E. Anthony
By
Geologic Hazards Science Center

A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days

Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland...
Authors
Kristian Svennevig, Steven P. Hicks, Thomas Forbriger, Thomas Lecocq, Ruedi Widmer-Schnidrig, Anne Mangeney, Clément Hibert, Niels J. Korsgaard, Antoine S. Lucas, Claudio Satriano, Robert E. Anthony, Aurélien Mordret, Sven Schippkus, Søren Rysgaard, Wieter Boone, Steven Gibbons, Kristen L. Cook, Sylfest Glimsdal, Finn Løvholt, Koen Van Noten, Jelle D. Assink, Alexis Marboeuf, Anthony Lomax, Kris Vanneste, Taka’aki Taira, Matteo Spagnolo, Raphael de Plaen, Paula Koelemeijer, Carl Ebeling, Andrea Cannata, William D. Hardcourt, David G. Cornwell, Corentin Caudron, Piero Poli, Pascal Bernard, Eric Larose, Eleonore Stutzmann, Peter H. Voss, Bjorn Lund, Flavio Cannavo, Manuel J. Castro-Díaz, Esteban J. Chaves, Trine Dahl-Jensen, Nicolas De Pinho Dias, Aline Deprez, Roeland Develter, Douglas Dreger, Laslo G. Evers, Enrique D. Fernández-Nieto, Ana M.G. Ferreira, Gareth J. Funning, Alice-Agnes Gabriel, Marc Hendrickx, Alan L. Kafka, Marie Keiding, Jeffrey T. Kerby, Shfaqat A. Khan, Andreas Kjær Dideriksen, Oliver D. Lamb, Tine B. Larsen, Bradley Lipovsky, Ikha Magdalena, Jean-Philippe Malet, Mikkel Myrup, Luis Rivera, Eugenio Ruiz-Castillo, Selina Wetter, Bastien Wirtz
By
Geologic Hazards Science Center

Preface to focus section on new frontiers and advances in global seismology Preface to focus section on new frontiers and advances in global seismology

Over the last century, many of the fundamental advances in our understanding of the solid Earth have been underpinned by seismic observations recorded on long‐running networks of globally distributed seismic instruments (e.g., Agnew et al., 1976; Romanowicz et al., 1984; Hanka and Kind, 1994; Peterson and Hutt, 2014; Ringler et al., 2022a). During this time, seismic data quality and the...
Authors
Robert E. Anthony, Nicolas Leroy, Robert Mellors, Adam T. Ringler, Joachim Saul, Martin Vallee, David C. Wilson
By
Geologic Hazards Science Center

Background seismic noise levels among the Caribbean network and the role of station proximity to coastline Background seismic noise levels among the Caribbean network and the role of station proximity to coastline

The amplitude and frequency content of background seismic noise is highly variable with geographic location. Understanding the characteristics and behavior of background seismic noise as a function of location can inform approaches to improve network performance and in turn increase earthquake detection capabilities. Here, we calculate power spectral density estimates in one‐hour windows...
Authors
Justin T. Wilgus, Adam T. Ringler, Brandon Schmandt, David C. Wilson, Robert E. Anthony
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Global seismic networks operated by the U.S. Geological Survey Global seismic networks operated by the U.S. Geological Survey

The U.S. Geological Survey (USGS) Global Seismographic Network (GSN) Program operates two thirds of the GSN, a network of state‐of‐the‐art, digital seismological and geophysical sensors with digital telecommunications. This network serves as a multiuse scientific facility and a valuable resource for research, education, and monitoring. The other one third of the GSN is funded by the...
Authors
David C. Wilson, Charles R. Hutt, Lind Gee, Adam T. Ringler, Robert E. Anthony
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Increasing ocean wave energy observed in Earth’s seismic wavefield since the late 20th century Increasing ocean wave energy observed in Earth’s seismic wavefield since the late 20th century

Ocean waves excite continuous globally observable seismic signals. We use data from 52 globally distributed seismographs to analyze the vertical component primary microseism wavefield at 14–20 s period between the late 1980s and August 2022. This signal is principally composed of Rayleigh waves generated by ocean wave seafloor tractions at less than several hundred meters depth, and is...
Authors
Richard C. Aster, Adam T. Ringler, Robert E. Anthony, Thomas A. Lee
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Comment on “A new decade in seismoacoustics (2010–2022)” by Fransiska Dannemann Dugick, Clinton Koch, Elizabeth Berg, Stephen Arrowsmith, and Sarah Albert Comment on “A new decade in seismoacoustics (2010–2022)” by Fransiska Dannemann Dugick, Clinton Koch, Elizabeth Berg, Stephen Arrowsmith, and Sarah Albert

An increase in seismic stations also having microbarographs has led to increased interest in the field of seismoacoustics. A review of the recent advances in this field can be found in Dannemann Dugick et al. (2023). The goal of this note is to draw the attention of the readers of Dannemann Dugick et al. (2023) to several additional interactions between the solid Earth and atmosphere...
Authors
Adam T. Ringler, Robert E. Anthony, Brian Shiro, Toshiro Tanimoto, David C. Wilson
By
Natural Hazards Mission Area, Earthquake Hazards Program, Volcano Hazards Program, Geologic Hazards Science Center, Volcano Science Center

Comparison of co-recorded analog and digital systems for characterization of responses and uncertainties Comparison of co-recorded analog and digital systems for characterization of responses and uncertainties

One of the most prominent challenges related to legacy seismic data is determining how these data can be appropriately used in modern research applications. The wide variety of instrumentation used in the analog era, the format of recording on paper wrapped around a helicorder drum, and limited metadata information introduces ambiguities that are not typical of modern digital data...
Authors
Thomas A. Lee, Adam T. Ringler, Robert E. Anthony, Miaki Ishii
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Introduction to the digitization of seismic data: A user’s guide Introduction to the digitization of seismic data: A user’s guide

Modern seismic data are collected, distributed, and analyzed using digital formats, and this has become a standard for the field. Although most modern seismometers still make use of analog electronic circuits, their data are converted from an analog voltage output to time‐tagged counts by way of digitization. Although much of the digitization process is not complicated to conceptualize...
Authors
Adam T. Ringler, Robert E. Anthony, Patrick Bastien, Adam Pascale, Bion J. Merchant
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Earth’s upper crust seismically excited by infrasound from the 2022 Hunga Tonga–Hunga Ha’apai eruption, Tonga Earth’s upper crust seismically excited by infrasound from the 2022 Hunga Tonga–Hunga Ha’apai eruption, Tonga

Records of pressure variations on seismographs were historically considered unwanted noise; however, increased deployments of collocated seismic and acoustic instrumentation have driven recent efforts to use this effect induced by both wind and anthropogenic explosions to invert for near‐surface Earth structure. These studies have been limited to shallow structure because the pressure...
Authors
Robert E. Anthony, Adam T. Ringler, Toshiro Tanimoto, Robin Matoza, Silvio De Angelis, David C. Wilson
By
Natural Hazards Mission Area, Geologic Hazards Science Center

The global seismographic network reveals atmospherically coupled normal modes excited by the 2022 Hunga Tonga eruption The global seismographic network reveals atmospherically coupled normal modes excited by the 2022 Hunga Tonga eruption

The eruption of the submarine Hunga Tonga-Hunga Haʻapai (Hunga Tonga) volcano on 15 January 2022, was one of the largest volcanic explosions recorded by modern geophysical instrumentation. The eruption was notable for the broad range of atmospheric wave phenomena it generated and for their unusual coupling with the oceans and solid Earth. The event was recorded worldwide across the...
Authors
Adam T. Ringler, Robert E. Anthony, Rick Aster, T. Taira, Brian Shiro, David C. Wilson, S. H. De Angelis, C. Ebeling, Matthew M. Haney, R. Matoza, H. Ortiz
By
Natural Hazards Mission Area, Volcano Hazards Program, Geologic Hazards Science Center, Volcano Science Center

Achievements and prospects of global broadband seismographic networks after 30 years of continuous geophysical observations Achievements and prospects of global broadband seismographic networks after 30 years of continuous geophysical observations

Global seismographic networks (GSNs) emerged during the late nineteenth and early twentieth centuries, facilitated by seminal international developments in theory, technology, instrumentation, and data exchange. The mid- to late-twentieth century saw the creation of the World-Wide Standardized Seismographic Network (1961) and International Deployment of Accelerometers (1976), which...
Authors
Adam T. Ringler, Robert E. Anthony, R. C. Aster, C. J. Ammon, S. Arrowsmith, Harley M. Benz, C. Ebeling, A. Frassetto, W. Y. Kim, Paula Koelemeijer, H. C. P. Lau, V. Lekic, J. P. Montagner, P. G. Richards, D. P. Schaff, M. Vallee, William L. Yeck
By
Natural Hazards Mission Area, Geologic Hazards Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

ASL Sensor Test Suite ASL Sensor Test Suite

This program is used to analyze various aspects of seismic sensor data in order to determine information about their configuration, such as gain and orientation.
The Loneliest Seismometers on Earth

The Loneliest Seismometers on Earth

The USGS Albuquerque Seismological Observatory is partnering with the IceCube Neutrino Observatory, University of Wisconsin-Madison, and the National...

Read Article
Deep Ice Seismometer Thumbnail Deep Ice Seismometer Thumbnail
World's deepest seismometer braces the South Pole!
Deep Ice Seismometer Thumbnail

World's deepest seismometer braces the South Pole!

World's deepest seismometer braces the South Pole!

Get ready to journey to the bottom of the world! The Deep Ice Seismometer is a groundbreaking new tool that will revolutionize how we monitor earthquakes across the globe. Developed through a powerful collaboration between the U.S.

By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center
Deep Ice Seismometer Thumbnail

World's deepest seismometer braces the South Pole!

World's deepest seismometer braces the South Pole!

Get ready to journey to the bottom of the world! The Deep Ice Seismometer is a groundbreaking new tool that will revolutionize how we monitor earthquakes across the globe. Developed through a powerful collaboration between the U.S.

By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center
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