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Peter J Haeussler, Ph.D.

Most of my research is related to earthquake and tsunami hazards in Alaska, with a focus on paleoseismology, submarine landslides, and active faulting. I am the Alaska Coordinator for the Earthquake Hazards Program of the USGS. I also study various aspects of the framework geology of Alaska, with a focus on neotectonics and tectonics.  

I use various tools to understand earthquakes and earthquake hazards in Alaska. I’ve studied the tectonic evolution of parts of Alaska, accretionary prisms along Alaska’s margin, forearc and splay faulting, submarine landslides, mountain building and exhumation, landscape evolution, glacial histories, and sedimentary basins. I’ve worked with marine and terrestrial seismic reflection and potential field data. Current work is focused on lacustrine paleoseismology, splay faulting, and various seismic hazards projects.

Professional Experience

  • 1994 - Present  Research Geologist, U.S. Geological Survey, Anchorage, AK

  • 1992 - 1994       Postdoctoral Researcher, U.S. Geological Survey, Anchorage, AK

  • 1992                   Geologist, U.S. Geological Survey, Menlo Park, CA

  • 1986 - 1991       Research Assistant, University of California Santa Cruz

  • 1985 - 1988       Teaching Assistant, University of California Santa Cruz

  • 1985                   Geologist, Lancer Energy Corporation, Wilmore, KY

Education and Certifications

  • Ph.D.   1991   University of California Santa Cruz    Earth Sciences

  • B.S.     1984    Michigan State University       Geology

Affiliations and Memberships*

  • 1985-present, American Geophysical Union

  • 1985-present, Geological Society of America

  • 1992-present, Alaska Geological Society

  • 2010-present, Seismological Society of America

Honors and Awards

  • Fellow, Geological Society of America

Science and Products

2018 Anchorage Earthquake -- Overflight Photo 1 - 12/03/18

M7.1 November 30, 2018 Anchorage Earthquake

A magnitude 7.1 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).
By
Alaska Science Center
M7.1 November 30, 2018 Anchorage Earthquake

M7.1 November 30, 2018 Anchorage Earthquake

A magnitude 7.1 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).
Learn More
Image: Geologic Studies on Sitkinak Island, Alaska

Alaska-Aleutian Subduction Zone Studies

Our research team is exploring seismic and aseismic slip along the Alaska-Aleutian arc and studying the prehistoric record of megathrust earthquakes and tsunamis along the Alaska-Aleutian subduction zone Seismic and Aseismic Slip : Tectonic tremor and associated slow slip events represent a newly discovered part of the earthquake cycle. This research aims to understand the process generating...
By
Alaska Science Center
Alaska-Aleutian Subduction Zone Studies

Alaska-Aleutian Subduction Zone Studies

Our research team is exploring seismic and aseismic slip along the Alaska-Aleutian arc and studying the prehistoric record of megathrust earthquakes and tsunamis along the Alaska-Aleutian subduction zone Seismic and Aseismic Slip : Tectonic tremor and associated slow slip events represent a newly discovered part of the earthquake cycle. This research aims to understand the process generating...
Learn More
Image: Central Alaska Range

Western Alaska Range Metallogeny and Tectonics

There are many different types of mineral deposits present in the Western Alaska Range: plutonic gold, porphyry copper-gold (Pebble prospect), epithermal gold, tin-silver skarns, sedimentary barite, mafic hosted nickle-platinum-group elements, uranium-thorium rare earth elements, and even a diamond prospect.
By
Mineral Resources Program, Alaska Science Center
Western Alaska Range Metallogeny and Tectonics

Western Alaska Range Metallogeny and Tectonics

There are many different types of mineral deposits present in the Western Alaska Range: plutonic gold, porphyry copper-gold (Pebble prospect), epithermal gold, tin-silver skarns, sedimentary barite, mafic hosted nickle-platinum-group elements, uranium-thorium rare earth elements, and even a diamond prospect.
Learn More
The tsunami created by the 2004 M9.1 Sumatra earthquake.

The "Snow Plow Theory"* of Early-Arriving Tsunamis

Release Date: JUNE 1, 2015 What is a splay fault, and how can they affect tsunamis? * completely contrived term by this author, not a scientific term or theory
By
Natural Hazards Mission Area, Earthquake Hazards Program
The "Snow Plow Theory"* of Early-Arriving Tsunamis

The "Snow Plow Theory"* of Early-Arriving Tsunamis

Release Date: JUNE 1, 2015 What is a splay fault, and how can they affect tsunamis? * completely contrived term by this author, not a scientific term or theory
Learn More
Filter Total Items: 25

Radiocarbon Data for Tree Ring Samples from Girdwood, Alaska Radiocarbon Data for Tree Ring Samples from Girdwood, Alaska

This dataset consists of sample details and radiocarbon age data of tree-ring samples collected near Girdwood, Alaska, and analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility.
By
Alaska Science Center

Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023) Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023)

This dataset includes sub-bottom seismic and sediment core data collected during USGS field activities 2021-612-FA, 2020-625-FA, and 2020-615-FA. Sub-bottom data include Chirp seismic in SEG-Y format with associated navigation tracklines. Core data include photo and computed tomography (CT) scans, and various mineralogical, radiometric, and other sampling data. Users are advised to read...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

Multichannel seismic reflection data were collected by the U.S. Geological Survey in May of 2015 outside of Palma Bay, Alaska. Seismic data were acquired coincidentally with high resolution bathymetry (Dartnell and others, 2022). Data were acquired to map the offshore extension of the Queen Charlotte-Fairweather Fault. The fault has produced several significant earthquakes during the...
By
Pacific Coastal and Marine Science Center

Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA

High-resolution multichannel seismic reflection data and chirp sub-bottom data were collected by the U.S. Geological Survey in July and August 2017 offshore southeast Alaska to expand data coverage along the Queen Charlotte Fault system. Data were acquired to study earthquake hazards, fault mechanics and submarine mass wasting processes along the Queen Charlotte fault system, a 1200 km...
By
Pacific Coastal and Marine Science Center

Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA

In 2015 the U.S. Geological Survey, Pacific Coastal and Marine Science Center, in cooperation with the Alaska Department of Fish and Game (ADFG), collected bathymetry and acoustic-backscatter data near Cross Sound in southeast Alaska using a Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The bathymetry and acoustic-backscatter data are provided as GeoTIFFs with 10-m...
By
Pacific Coastal and Marine Science Center

Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska

This data release contains whole rock major and trace element data for 399 igneous and sedimentary rock samples collected from the Western Alaska Range between 1968 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey. All materials were analyzed by ALS Global, between 2014 and 2018, by a range of different techniques, so multiple unique entries for a given...
By
Alaska Science Center
No results found.
Filter Total Items: 154

The 2023 Alaska National Seismic Hazard Model The 2023 Alaska National Seismic Hazard Model

US Geological Survey (USGS) National Seismic Hazard Models (NSHMs) are used extensively for seismic design regulations in the United States and earthquake scenario development, as well as risk assessment and mitigation for both buildings and infrastructure. This 2023 update of the long-term, time-independent Alaska NSHM includes substantial changes to both the earthquake rupture forecast...
Authors
Peter M. Powers, Jason M. Altekruse, Andrea L. Llenos, Andrew J. Michael, Kirstie Lafon Haynie, Peter J. Haeussler, Adrian Bender, Sanaz Rezaeian, Morgan P. Moschetti, James Andrew Smith, Richard W. Briggs, Robert C. Witter, Charles Mueller, Yuehua Zeng, Demi Leafar Girot, Julie A. Herrick, Allison Shumway, Mark D. Petersen
By
Geologic Hazards Science Center

Repeated coseismic uplift of coastal lagoons above the Patton Bay Splay Fault System, Montague Island, Alaska, USA Repeated coseismic uplift of coastal lagoons above the Patton Bay Splay Fault System, Montague Island, Alaska, USA

Coseismic slip on the Patton Bay splay fault system during the 1964 Mw 9.2 Great Alaska Earthquake contributed to local tsunami generation and vertically uplifted shorelines as much as 11 m on Montague Island in Prince William Sound (PWS). Sudden uplift of 3.7–4.3 m caused coastal lagoons along the island's northwestern coast to gradually drain. The resulting change in depositional...
Authors
Jessica DePaolis, Tina Dura, Robert C. Witter, Peter J. Haeussler, Adrian Bender, Janet H. Curran, D. Reide Corbett
By
Alaska Science Center

Fairweather transform boundary Oligocene to present orogenesis: Fairweather Range vertical extrusion and rotation of the Yakutat microplate at ca. 3 Ma Fairweather transform boundary Oligocene to present orogenesis: Fairweather Range vertical extrusion and rotation of the Yakutat microplate at ca. 3 Ma

Oblique-slip along transform fault boundaries is often partitioned between a strike-slip system and thrust faults that accommodate contraction. However, topography along the Yakutat-North American transform (Fairweather fault), is asymmetric with low-terrain above active thrusts on the western, Yakutat side of the transform and high topography on the continental side with peaks >4500 m...
Authors
Jeff Benowitz, Richard O. Lease, Peter J. Haeussler, Terry Pavlis, Michael Mann
By
Alaska Science Center

The 2023 US 50-State National Seismic Hazard Model: Overview and implications The 2023 US 50-State National Seismic Hazard Model: Overview and implications

The US National Seismic Hazard Model (NSHM) was updated in 2023 for all 50 states using new science on seismicity, fault ruptures, ground motions, and probabilistic techniques to produce a standard of practice for public policy and other engineering applications (defined for return periods greater than ∼475 or less than ∼10,000 years). Changes in 2023 time-independent seismic hazard...
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Edward H. Field, Morgan P. Moschetti, Kishor S. Jaiswal, Kevin R. Milner, Sanaz Rezaeian, Arthur D. Frankel, Andrea L. Llenos, Andrew J. Michael, Jason M. Altekruse, Sean Kamran Ahdi, Kyle Withers, Charles Mueller, Yuehua Zeng, Robert E. Chase, Leah M. Salditch, Nico Luco, Kenneth S. Rukstales, Julie A. Herrick, Demi Leafar Girot, Brad T. Aagaard, Adrian Bender, Michael L. Blanpied, Richard W. Briggs, Oliver S. Boyd, Brandon Clayton, Christopher B. DuRoss, Eileen L. Evans, Peter J. Haeussler, Alexandra Elise Hatem, Kirstie Lafon Haynie, Elizabeth H. Hearn, Kaj M. Johnson, Zachary Alan Kortum, N. Simon Kwong, Andrew James Makdisi, Henry Mason, Daniel McNamara, Devin McPhillips, P. Okubo, Morgan T. Page, Frederick Pollitz, Justin Rubinstein, Bruce E. Shaw, Zheng-Kang Shen, Brian Shiro, James Andrew Smith, William J. Stephenson, Eric M. Thompson, Jessica A. Thompson Jobe, Erin A. Wirth, Robert C. Witter
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Dating the penultimate great earthquake in south-central Alaska using tree-ring crossdating and radiocarbon wiggle-matching Dating the penultimate great earthquake in south-central Alaska using tree-ring crossdating and radiocarbon wiggle-matching

A forest bed of tree stumps currently in the intertidal zone at Girdwood, south-central Alaska, records coseismic submergence during the penultimate great earthquake. Tree-ring samples from ten spruce stumps were crossdated to develop a 149-year-long ring-width chronology. Radiocarbon wiggle-matching found that single-ring ages from the chronology were offset 28 ± 7 years older than the...
Authors
David J Barclay, Peter J. Haeussler, Robert C. Witter
By
Alaska Science Center

Rapid shallow megathrust afterslip from the 2021 M8.2 Chignik, Alaska earthquake revealed by seafloor geodesy Rapid shallow megathrust afterslip from the 2021 M8.2 Chignik, Alaska earthquake revealed by seafloor geodesy

The shallower portions of subduction zone megathrust faults host Earth’s most hazardous tsunamigenic earthquakes, yet understanding how and when they slip remains elusive because of challenges making seafloor observations. We performed Global Navigation Satellite System Acoustic seafloor geodetic surveys before and ~2.5 months after the 29 July 2021 Mw (moment magnitude) 8.2 Chignik...
Authors
Benjamin A. Brooks, Dara Elyse Goldberg, John DeSanto, Todd Ericksen, Spahr Webb, Scott Nooner, C. David Chadwell, James H. Foster, Sarah E. Minson, Robert C. Witter, Peter J. Haeussler, Jeffery T. Freymueller, William D. Barnhart, Johanna Nevitt
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Science and Products

2018 Anchorage Earthquake -- Overflight Photo 1 - 12/03/18

M7.1 November 30, 2018 Anchorage Earthquake

A magnitude 7.1 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).
By
Alaska Science Center
M7.1 November 30, 2018 Anchorage Earthquake

M7.1 November 30, 2018 Anchorage Earthquake

A magnitude 7.1 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).
Learn More
Image: Geologic Studies on Sitkinak Island, Alaska

Alaska-Aleutian Subduction Zone Studies

Our research team is exploring seismic and aseismic slip along the Alaska-Aleutian arc and studying the prehistoric record of megathrust earthquakes and tsunamis along the Alaska-Aleutian subduction zone Seismic and Aseismic Slip : Tectonic tremor and associated slow slip events represent a newly discovered part of the earthquake cycle. This research aims to understand the process generating...
By
Alaska Science Center
Alaska-Aleutian Subduction Zone Studies

Alaska-Aleutian Subduction Zone Studies

Our research team is exploring seismic and aseismic slip along the Alaska-Aleutian arc and studying the prehistoric record of megathrust earthquakes and tsunamis along the Alaska-Aleutian subduction zone Seismic and Aseismic Slip : Tectonic tremor and associated slow slip events represent a newly discovered part of the earthquake cycle. This research aims to understand the process generating...
Learn More
Image: Central Alaska Range

Western Alaska Range Metallogeny and Tectonics

There are many different types of mineral deposits present in the Western Alaska Range: plutonic gold, porphyry copper-gold (Pebble prospect), epithermal gold, tin-silver skarns, sedimentary barite, mafic hosted nickle-platinum-group elements, uranium-thorium rare earth elements, and even a diamond prospect.
By
Mineral Resources Program, Alaska Science Center
Western Alaska Range Metallogeny and Tectonics

Western Alaska Range Metallogeny and Tectonics

There are many different types of mineral deposits present in the Western Alaska Range: plutonic gold, porphyry copper-gold (Pebble prospect), epithermal gold, tin-silver skarns, sedimentary barite, mafic hosted nickle-platinum-group elements, uranium-thorium rare earth elements, and even a diamond prospect.
Learn More
The tsunami created by the 2004 M9.1 Sumatra earthquake.

The "Snow Plow Theory"* of Early-Arriving Tsunamis

Release Date: JUNE 1, 2015 What is a splay fault, and how can they affect tsunamis? * completely contrived term by this author, not a scientific term or theory
By
Natural Hazards Mission Area, Earthquake Hazards Program
The "Snow Plow Theory"* of Early-Arriving Tsunamis

The "Snow Plow Theory"* of Early-Arriving Tsunamis

Release Date: JUNE 1, 2015 What is a splay fault, and how can they affect tsunamis? * completely contrived term by this author, not a scientific term or theory
Learn More
Filter Total Items: 25

Radiocarbon Data for Tree Ring Samples from Girdwood, Alaska Radiocarbon Data for Tree Ring Samples from Girdwood, Alaska

This dataset consists of sample details and radiocarbon age data of tree-ring samples collected near Girdwood, Alaska, and analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility.
By
Alaska Science Center

Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023) Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023)

This dataset includes sub-bottom seismic and sediment core data collected during USGS field activities 2021-612-FA, 2020-625-FA, and 2020-615-FA. Sub-bottom data include Chirp seismic in SEG-Y format with associated navigation tracklines. Core data include photo and computed tomography (CT) scans, and various mineralogical, radiometric, and other sampling data. Users are advised to read...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

Multichannel seismic reflection data were collected by the U.S. Geological Survey in May of 2015 outside of Palma Bay, Alaska. Seismic data were acquired coincidentally with high resolution bathymetry (Dartnell and others, 2022). Data were acquired to map the offshore extension of the Queen Charlotte-Fairweather Fault. The fault has produced several significant earthquakes during the...
By
Pacific Coastal and Marine Science Center

Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA

High-resolution multichannel seismic reflection data and chirp sub-bottom data were collected by the U.S. Geological Survey in July and August 2017 offshore southeast Alaska to expand data coverage along the Queen Charlotte Fault system. Data were acquired to study earthquake hazards, fault mechanics and submarine mass wasting processes along the Queen Charlotte fault system, a 1200 km...
By
Pacific Coastal and Marine Science Center

Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA

In 2015 the U.S. Geological Survey, Pacific Coastal and Marine Science Center, in cooperation with the Alaska Department of Fish and Game (ADFG), collected bathymetry and acoustic-backscatter data near Cross Sound in southeast Alaska using a Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The bathymetry and acoustic-backscatter data are provided as GeoTIFFs with 10-m...
By
Pacific Coastal and Marine Science Center

Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska

This data release contains whole rock major and trace element data for 399 igneous and sedimentary rock samples collected from the Western Alaska Range between 1968 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey. All materials were analyzed by ALS Global, between 2014 and 2018, by a range of different techniques, so multiple unique entries for a given...
By
Alaska Science Center
No results found.
Filter Total Items: 154

The 2023 Alaska National Seismic Hazard Model The 2023 Alaska National Seismic Hazard Model

US Geological Survey (USGS) National Seismic Hazard Models (NSHMs) are used extensively for seismic design regulations in the United States and earthquake scenario development, as well as risk assessment and mitigation for both buildings and infrastructure. This 2023 update of the long-term, time-independent Alaska NSHM includes substantial changes to both the earthquake rupture forecast...
Authors
Peter M. Powers, Jason M. Altekruse, Andrea L. Llenos, Andrew J. Michael, Kirstie Lafon Haynie, Peter J. Haeussler, Adrian Bender, Sanaz Rezaeian, Morgan P. Moschetti, James Andrew Smith, Richard W. Briggs, Robert C. Witter, Charles Mueller, Yuehua Zeng, Demi Leafar Girot, Julie A. Herrick, Allison Shumway, Mark D. Petersen
By
Geologic Hazards Science Center

Repeated coseismic uplift of coastal lagoons above the Patton Bay Splay Fault System, Montague Island, Alaska, USA Repeated coseismic uplift of coastal lagoons above the Patton Bay Splay Fault System, Montague Island, Alaska, USA

Coseismic slip on the Patton Bay splay fault system during the 1964 Mw 9.2 Great Alaska Earthquake contributed to local tsunami generation and vertically uplifted shorelines as much as 11 m on Montague Island in Prince William Sound (PWS). Sudden uplift of 3.7–4.3 m caused coastal lagoons along the island's northwestern coast to gradually drain. The resulting change in depositional...
Authors
Jessica DePaolis, Tina Dura, Robert C. Witter, Peter J. Haeussler, Adrian Bender, Janet H. Curran, D. Reide Corbett
By
Alaska Science Center

Fairweather transform boundary Oligocene to present orogenesis: Fairweather Range vertical extrusion and rotation of the Yakutat microplate at ca. 3 Ma Fairweather transform boundary Oligocene to present orogenesis: Fairweather Range vertical extrusion and rotation of the Yakutat microplate at ca. 3 Ma

Oblique-slip along transform fault boundaries is often partitioned between a strike-slip system and thrust faults that accommodate contraction. However, topography along the Yakutat-North American transform (Fairweather fault), is asymmetric with low-terrain above active thrusts on the western, Yakutat side of the transform and high topography on the continental side with peaks >4500 m...
Authors
Jeff Benowitz, Richard O. Lease, Peter J. Haeussler, Terry Pavlis, Michael Mann
By
Alaska Science Center

The 2023 US 50-State National Seismic Hazard Model: Overview and implications The 2023 US 50-State National Seismic Hazard Model: Overview and implications

The US National Seismic Hazard Model (NSHM) was updated in 2023 for all 50 states using new science on seismicity, fault ruptures, ground motions, and probabilistic techniques to produce a standard of practice for public policy and other engineering applications (defined for return periods greater than ∼475 or less than ∼10,000 years). Changes in 2023 time-independent seismic hazard...
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Edward H. Field, Morgan P. Moschetti, Kishor S. Jaiswal, Kevin R. Milner, Sanaz Rezaeian, Arthur D. Frankel, Andrea L. Llenos, Andrew J. Michael, Jason M. Altekruse, Sean Kamran Ahdi, Kyle Withers, Charles Mueller, Yuehua Zeng, Robert E. Chase, Leah M. Salditch, Nico Luco, Kenneth S. Rukstales, Julie A. Herrick, Demi Leafar Girot, Brad T. Aagaard, Adrian Bender, Michael L. Blanpied, Richard W. Briggs, Oliver S. Boyd, Brandon Clayton, Christopher B. DuRoss, Eileen L. Evans, Peter J. Haeussler, Alexandra Elise Hatem, Kirstie Lafon Haynie, Elizabeth H. Hearn, Kaj M. Johnson, Zachary Alan Kortum, N. Simon Kwong, Andrew James Makdisi, Henry Mason, Daniel McNamara, Devin McPhillips, P. Okubo, Morgan T. Page, Frederick Pollitz, Justin Rubinstein, Bruce E. Shaw, Zheng-Kang Shen, Brian Shiro, James Andrew Smith, William J. Stephenson, Eric M. Thompson, Jessica A. Thompson Jobe, Erin A. Wirth, Robert C. Witter
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Dating the penultimate great earthquake in south-central Alaska using tree-ring crossdating and radiocarbon wiggle-matching Dating the penultimate great earthquake in south-central Alaska using tree-ring crossdating and radiocarbon wiggle-matching

A forest bed of tree stumps currently in the intertidal zone at Girdwood, south-central Alaska, records coseismic submergence during the penultimate great earthquake. Tree-ring samples from ten spruce stumps were crossdated to develop a 149-year-long ring-width chronology. Radiocarbon wiggle-matching found that single-ring ages from the chronology were offset 28 ± 7 years older than the...
Authors
David J Barclay, Peter J. Haeussler, Robert C. Witter
By
Alaska Science Center

Rapid shallow megathrust afterslip from the 2021 M8.2 Chignik, Alaska earthquake revealed by seafloor geodesy Rapid shallow megathrust afterslip from the 2021 M8.2 Chignik, Alaska earthquake revealed by seafloor geodesy

The shallower portions of subduction zone megathrust faults host Earth’s most hazardous tsunamigenic earthquakes, yet understanding how and when they slip remains elusive because of challenges making seafloor observations. We performed Global Navigation Satellite System Acoustic seafloor geodetic surveys before and ~2.5 months after the 29 July 2021 Mw (moment magnitude) 8.2 Chignik...
Authors
Benjamin A. Brooks, Dara Elyse Goldberg, John DeSanto, Todd Ericksen, Spahr Webb, Scott Nooner, C. David Chadwell, James H. Foster, Sarah E. Minson, Robert C. Witter, Peter J. Haeussler, Jeffery T. Freymueller, William D. Barnhart, Johanna Nevitt
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government

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