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SeanPaul La Selle

Geologist with the USGS Pacific Coastal and Marine Science Center

Science and Products

A computed-generated image showing the Queen Charlotte Fault and nearshore area, using bathymetry and lidar data

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
Learn More
A home, severely damaged by the tsunami that hit Sumatra on December 26, 2004, sits atop debris.

Tsunami Hazards, Modeling, and the Sedimentary Record

Basic research to develop the geologic record of paleotsunamis and improve the ability to interpret that record is needed to mitigate tsunami risk in the U.S.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory, Sediment Lab Suite and Carbon Analysis Laboratory, Subduction Zone Science
Tsunami Hazards, Modeling, and the Sedimentary Record

Tsunami Hazards, Modeling, and the Sedimentary Record

Basic research to develop the geologic record of paleotsunamis and improve the ability to interpret that record is needed to mitigate tsunami risk in the U.S.
Learn More
Filter Total Items: 15

Sediment core data from offshore Cascadia during field activities 2020-633-FA and 2021-636-FA Sediment core data from offshore Cascadia during field activities 2020-633-FA and 2021-636-FA

This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and grainsize data. As part of a multi-year project focused on characterizing offshore marine geohazards (tsunamis, earthquakes, and landslides), the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program is collaborating with MBARI to conduct research along...
By
Pacific Coastal and Marine Science Center

Sublacustrine landslide and tsunami models from Lake Quinault, Washington Sublacustrine landslide and tsunami models from Lake Quinault, Washington

This USGS data release provides model setup files to simulate a hypothetical sublacustrine landslide in Lake Quinault and resulting tsunami waves.
By
Pacific Coastal and Marine Science Center

Sediment core data from offshore Cascadia during field activity 2022-653-FA Sediment core data from offshore Cascadia during field activity 2022-653-FA

This data release contains sediment core data including X-ray Computed Tomography (CT) scans, photos, and multi-sensor core logger (MSCL) data. Sediment cores were collected along the Cascadia Subduction Zone (offshore northern California, Oregon and Washington) during U.S. Geological Survey cruise 2022-653-FA aboard the M/V Bold-Horizon. The cores were collected to evaluate potential...
By
Pacific Coastal and Marine Science Center

Sediment core data collected from Cargill Marsh, South San Francisco Bay, California during field activities 2022-643-FA and 2023-681-FA Sediment core data collected from Cargill Marsh, South San Francisco Bay, California during field activities 2022-643-FA and 2023-681-FA

The U.S. Geological Survey Pacific Coastal and Marine Science Center collected cores in the Cargill Marsh section of Whales Tail South Marsh in Eden Landing Ecological Reserve in Alameda County, California in 2022 and 2023. This data release includes photographs, computed tomography (CT) scans, and radiometric data. Details on core locations and measured variables are included in...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021 Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021

Seismic-reflection data and cores were collected in Ozette Lake, Washington, from 2019 to 2021. These data were used to investigate submarine landslide deposits triggered by large Cascadia Subduction Zone earthquakes. Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Geology Program. In the US Pacific Northwest region, the greatest...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Tsunami deposit data and sediment transport models from the Salmon River estuary, central Oregon Tsunami deposit data and sediment transport models from the Salmon River estuary, central Oregon

This data release contains sedimentological data and numerical models representing the circa 1700 CE tsunami in the Salmon River estuary, Oregon. The thickness of sandy tsunami deposits was identified in hundreds of cores that map the extent of the deposit throughout the estuary. Grainsize data demonstrate the inland fining of the sandy tsunami deposits. The distribution of tsunami...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.
Ocean sand in wetland core
Ocean sand in wetland core
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.

Ocean sand in wetland core

Ocean sand in wetland core

A vibracore taken from a marshy area in Anahola Valley, Kaua‛i reveals a sandier mud layer.

By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.

Ocean sand in wetland core

Ocean sand in wetland core

A vibracore taken from a marshy area in Anahola Valley, Kaua‛i reveals a sandier mud layer.

By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory
Filter Total Items: 22

Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise

Climate-driven sea-level rise is increasing the frequency of coastal flooding worldwide, exacerbated locally by factors like land subsidence from groundwater and resource extraction. However, a process rarely considered in future sea-level rise scenarios is sudden (over minutes) land subsidence associated with great (>M8) earthquakes, which can exceed 1 m. Along the Washington, Oregon...
Authors
Tina Dura, William Chilton, David Small, Andra Garner, Andrea D. Hawkes, Diego Melgar, Simon E. Engelhart, Lydia M. Staisch, Robert C. Witter, Alan Nelson, Harvey Kelsey, Jonathan Allan, David S. Bruce, Jessica DePaolis, Mike Priddy, Richard W. Briggs, Robert Weiss, SeanPaul La Selle, Michael J. Willis, Benjamin P. Horton
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Alaska Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Pacific Coastal and Marine Science Center

Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

Despite growing interest and investment in salt-marsh restoration, relatively few marshes subjected to restoration efforts have been systematically monitored to assess physical restoration trajectory or success. In south San Francisco Bay, CA, USA, where 83% of wetlands were lost via human manipulation, the largest wetland restoration effort on the U.S. west coast is currently underway...
Authors
Daniel J. Nowacki, Jessica R. Lacy, SeanPaul La Selle
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

A 700-year rupture sequence of great eastern Aleutian earthquakes from tsunami modeling of stratigraphic records A 700-year rupture sequence of great eastern Aleutian earthquakes from tsunami modeling of stratigraphic records

Great Aleutian underthrusting earthquakes produced destructive tsunamis impacting Hawaiʻi in 1946 and 1957. Prior modeling of the 1957 tsunami deposit and runup records on eastern Aleutian and Hawaiian Islands jointly with tide-gauge observations across the Pacific Ocean constrained a rupture model with shallow slip up to 26 m along 600 km of the plate boundary. Here we implement this...
Authors
Yoshiki Yamazaki, Kwok Fai Cheung, Thorne Lay, SeanPaul La Selle, Robert C. Witter, Bruce E. Jaffe
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Combining multisite tsunami and deformation modeling to constrain slip distributions for the 1700 C.E. Cascadia earthquake Combining multisite tsunami and deformation modeling to constrain slip distributions for the 1700 C.E. Cascadia earthquake

A major earthquake ruptured the Cascadia subduction zone (CSZ) on 26 January 1700. Key paleoseismic evidence associated with this event include tsunami deposits, stratigraphic evidence of coastal coseismic subsidence, written Japanese records of a tsunami unaccompanied by earthquake shaking, and margin‐wide turbidites found offshore and in lacustrine environments. Despite this wealth of
Authors
David Small, Diego Melgar, SeanPaul La Selle, Andrew J Meigs
By
Pacific Coastal and Marine Science Center

Testing megathrust rupture models using tsunami deposits Testing megathrust rupture models using tsunami deposits

The 26 January 1700 CE Cascadia subduction zone earthquake ruptured much of the plate boundary and generated a tsunami that deposited sand in coastal marshes from northern California to Vancouver Island. Although the depositional record of tsunami inundation is extensive in some of these marshes, few sites have been investigated in enough detail to map the inland extent of sand...
Authors
SeanPaul La Selle, Alan R. Nelson, Robert C. Witter, Bruce E. Jaffe, Guy Gelfenbaum, Jason Scott Padgett
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center

A great tsunami earthquake component of the 1957 Aleutian Islands earthquake A great tsunami earthquake component of the 1957 Aleutian Islands earthquake

The great 1957 Aleutian Islands earthquake ruptured ∼1200 km of the plate boundary along the Aleutian subduction zone and produced a destructive tsunami across Hawaiʻi. Early seismic and tsunami analyses indicated that large megathrust fault slip was concentrated in the western Aleutian Islands, but tsunami waves generated by slip in the west cannot explain the large observed runup in...
Authors
Yoshiki Yamazaki, Thorne Lay, Kwok Fai Cheung, Robert C. Witter, SeanPaul La Selle, Bruce E. Jaffe
By
Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center
USGS Releases Global 3D Archive of Coral Reef Cores to Support Climate and Coastal Research

USGS Releases Global 3D Archive of Coral Reef Cores to Support Climate and Coastal Research

A new digital archive released by the USGS Pacific and St. Petersburg Coastal and Marine Science Centers gives scientists an unprecedented look inside...

Read Article
The Threat of Coastal Flooding from Cascadia Earthquake-Driven Land Subsidence

The Threat of Coastal Flooding from Cascadia Earthquake-Driven Land Subsidence

Along the Pacific Northwest coast, scientists have long warned of a looming threat: a massive earthquake from the Cascadia Subduction Zone, capable of...

Read Article
Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

A newly published study from USGS combines time-series measurements of sediment fluxes, repeat elevation surveys, and sediment core analysis to assess...

Read Article
Revisiting the 1957 Aleutian Earthquake: New Insights into Tsunami Hazards for Hawaiʻi

Revisiting the 1957 Aleutian Earthquake: New Insights into Tsunami Hazards for Hawaiʻi

Despite being separated by more than 3,910 kilometers (2,430 miles) of open ocean in the North Pacific, Hawai’i and Alaska’s Aleutian Islands share...

Read Article
Studying Tsunami Sands to Better Understand the 1700 Cascadia Earthquake

Studying Tsunami Sands to Better Understand the 1700 Cascadia Earthquake

Scientists from the U.S. Geological Survey (USGS) have leveraged sediment core mapping and sophisticated computer modeling to shed new light on the...

Read Article
Comparison of a century of sedimentary and written records on the San Francisco Peninsula

Comparison of a century of sedimentary and written records on the San Francisco Peninsula

New research from USGS and partners combines high-resolution sediment analysis with historical records to reveal the extent to which human activity...

Read Article

Science and Products

A computed-generated image showing the Queen Charlotte Fault and nearshore area, using bathymetry and lidar data

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
Learn More
A home, severely damaged by the tsunami that hit Sumatra on December 26, 2004, sits atop debris.

Tsunami Hazards, Modeling, and the Sedimentary Record

Basic research to develop the geologic record of paleotsunamis and improve the ability to interpret that record is needed to mitigate tsunami risk in the U.S.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory, Sediment Lab Suite and Carbon Analysis Laboratory, Subduction Zone Science
Tsunami Hazards, Modeling, and the Sedimentary Record

Tsunami Hazards, Modeling, and the Sedimentary Record

Basic research to develop the geologic record of paleotsunamis and improve the ability to interpret that record is needed to mitigate tsunami risk in the U.S.
Learn More
Filter Total Items: 15

Sediment core data from offshore Cascadia during field activities 2020-633-FA and 2021-636-FA Sediment core data from offshore Cascadia during field activities 2020-633-FA and 2021-636-FA

This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and grainsize data. As part of a multi-year project focused on characterizing offshore marine geohazards (tsunamis, earthquakes, and landslides), the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program is collaborating with MBARI to conduct research along...
By
Pacific Coastal and Marine Science Center

Sublacustrine landslide and tsunami models from Lake Quinault, Washington Sublacustrine landslide and tsunami models from Lake Quinault, Washington

This USGS data release provides model setup files to simulate a hypothetical sublacustrine landslide in Lake Quinault and resulting tsunami waves.
By
Pacific Coastal and Marine Science Center

Sediment core data from offshore Cascadia during field activity 2022-653-FA Sediment core data from offshore Cascadia during field activity 2022-653-FA

This data release contains sediment core data including X-ray Computed Tomography (CT) scans, photos, and multi-sensor core logger (MSCL) data. Sediment cores were collected along the Cascadia Subduction Zone (offshore northern California, Oregon and Washington) during U.S. Geological Survey cruise 2022-653-FA aboard the M/V Bold-Horizon. The cores were collected to evaluate potential...
By
Pacific Coastal and Marine Science Center

Sediment core data collected from Cargill Marsh, South San Francisco Bay, California during field activities 2022-643-FA and 2023-681-FA Sediment core data collected from Cargill Marsh, South San Francisco Bay, California during field activities 2022-643-FA and 2023-681-FA

The U.S. Geological Survey Pacific Coastal and Marine Science Center collected cores in the Cargill Marsh section of Whales Tail South Marsh in Eden Landing Ecological Reserve in Alameda County, California in 2022 and 2023. This data release includes photographs, computed tomography (CT) scans, and radiometric data. Details on core locations and measured variables are included in...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021 Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021

Seismic-reflection data and cores were collected in Ozette Lake, Washington, from 2019 to 2021. These data were used to investigate submarine landslide deposits triggered by large Cascadia Subduction Zone earthquakes. Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Geology Program. In the US Pacific Northwest region, the greatest...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Tsunami deposit data and sediment transport models from the Salmon River estuary, central Oregon Tsunami deposit data and sediment transport models from the Salmon River estuary, central Oregon

This data release contains sedimentological data and numerical models representing the circa 1700 CE tsunami in the Salmon River estuary, Oregon. The thickness of sandy tsunami deposits was identified in hundreds of cores that map the extent of the deposit throughout the estuary. Grainsize data demonstrate the inland fining of the sandy tsunami deposits. The distribution of tsunami...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.
Ocean sand in wetland core
Ocean sand in wetland core
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.

Ocean sand in wetland core

Ocean sand in wetland core

A vibracore taken from a marshy area in Anahola Valley, Kaua‛i reveals a sandier mud layer.

By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory
A long skinny core section of mud with a sandy layer in the middle of it lays on the marsh grass near where the core was taken.

Ocean sand in wetland core

Ocean sand in wetland core

A vibracore taken from a marshy area in Anahola Valley, Kaua‛i reveals a sandier mud layer.

By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory
Filter Total Items: 22

Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise

Climate-driven sea-level rise is increasing the frequency of coastal flooding worldwide, exacerbated locally by factors like land subsidence from groundwater and resource extraction. However, a process rarely considered in future sea-level rise scenarios is sudden (over minutes) land subsidence associated with great (>M8) earthquakes, which can exceed 1 m. Along the Washington, Oregon...
Authors
Tina Dura, William Chilton, David Small, Andra Garner, Andrea D. Hawkes, Diego Melgar, Simon E. Engelhart, Lydia M. Staisch, Robert C. Witter, Alan Nelson, Harvey Kelsey, Jonathan Allan, David S. Bruce, Jessica DePaolis, Mike Priddy, Richard W. Briggs, Robert Weiss, SeanPaul La Selle, Michael J. Willis, Benjamin P. Horton
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Alaska Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Pacific Coastal and Marine Science Center

Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

Despite growing interest and investment in salt-marsh restoration, relatively few marshes subjected to restoration efforts have been systematically monitored to assess physical restoration trajectory or success. In south San Francisco Bay, CA, USA, where 83% of wetlands were lost via human manipulation, the largest wetland restoration effort on the U.S. west coast is currently underway...
Authors
Daniel J. Nowacki, Jessica R. Lacy, SeanPaul La Selle
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

A 700-year rupture sequence of great eastern Aleutian earthquakes from tsunami modeling of stratigraphic records A 700-year rupture sequence of great eastern Aleutian earthquakes from tsunami modeling of stratigraphic records

Great Aleutian underthrusting earthquakes produced destructive tsunamis impacting Hawaiʻi in 1946 and 1957. Prior modeling of the 1957 tsunami deposit and runup records on eastern Aleutian and Hawaiian Islands jointly with tide-gauge observations across the Pacific Ocean constrained a rupture model with shallow slip up to 26 m along 600 km of the plate boundary. Here we implement this...
Authors
Yoshiki Yamazaki, Kwok Fai Cheung, Thorne Lay, SeanPaul La Selle, Robert C. Witter, Bruce E. Jaffe
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Combining multisite tsunami and deformation modeling to constrain slip distributions for the 1700 C.E. Cascadia earthquake Combining multisite tsunami and deformation modeling to constrain slip distributions for the 1700 C.E. Cascadia earthquake

A major earthquake ruptured the Cascadia subduction zone (CSZ) on 26 January 1700. Key paleoseismic evidence associated with this event include tsunami deposits, stratigraphic evidence of coastal coseismic subsidence, written Japanese records of a tsunami unaccompanied by earthquake shaking, and margin‐wide turbidites found offshore and in lacustrine environments. Despite this wealth of
Authors
David Small, Diego Melgar, SeanPaul La Selle, Andrew J Meigs
By
Pacific Coastal and Marine Science Center

Testing megathrust rupture models using tsunami deposits Testing megathrust rupture models using tsunami deposits

The 26 January 1700 CE Cascadia subduction zone earthquake ruptured much of the plate boundary and generated a tsunami that deposited sand in coastal marshes from northern California to Vancouver Island. Although the depositional record of tsunami inundation is extensive in some of these marshes, few sites have been investigated in enough detail to map the inland extent of sand...
Authors
SeanPaul La Selle, Alan R. Nelson, Robert C. Witter, Bruce E. Jaffe, Guy Gelfenbaum, Jason Scott Padgett
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center

A great tsunami earthquake component of the 1957 Aleutian Islands earthquake A great tsunami earthquake component of the 1957 Aleutian Islands earthquake

The great 1957 Aleutian Islands earthquake ruptured ∼1200 km of the plate boundary along the Aleutian subduction zone and produced a destructive tsunami across Hawaiʻi. Early seismic and tsunami analyses indicated that large megathrust fault slip was concentrated in the western Aleutian Islands, but tsunami waves generated by slip in the west cannot explain the large observed runup in...
Authors
Yoshiki Yamazaki, Thorne Lay, Kwok Fai Cheung, Robert C. Witter, SeanPaul La Selle, Bruce E. Jaffe
By
Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center
USGS Releases Global 3D Archive of Coral Reef Cores to Support Climate and Coastal Research

USGS Releases Global 3D Archive of Coral Reef Cores to Support Climate and Coastal Research

A new digital archive released by the USGS Pacific and St. Petersburg Coastal and Marine Science Centers gives scientists an unprecedented look inside...

Read Article
The Threat of Coastal Flooding from Cascadia Earthquake-Driven Land Subsidence

The Threat of Coastal Flooding from Cascadia Earthquake-Driven Land Subsidence

Along the Pacific Northwest coast, scientists have long warned of a looming threat: a massive earthquake from the Cascadia Subduction Zone, capable of...

Read Article
Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh

A newly published study from USGS combines time-series measurements of sediment fluxes, repeat elevation surveys, and sediment core analysis to assess...

Read Article
Revisiting the 1957 Aleutian Earthquake: New Insights into Tsunami Hazards for Hawaiʻi

Revisiting the 1957 Aleutian Earthquake: New Insights into Tsunami Hazards for Hawaiʻi

Despite being separated by more than 3,910 kilometers (2,430 miles) of open ocean in the North Pacific, Hawai’i and Alaska’s Aleutian Islands share...

Read Article
Studying Tsunami Sands to Better Understand the 1700 Cascadia Earthquake

Studying Tsunami Sands to Better Understand the 1700 Cascadia Earthquake

Scientists from the U.S. Geological Survey (USGS) have leveraged sediment core mapping and sophisticated computer modeling to shed new light on the...

Read Article
Comparison of a century of sedimentary and written records on the San Francisco Peninsula

Comparison of a century of sedimentary and written records on the San Francisco Peninsula

New research from USGS and partners combines high-resolution sediment analysis with historical records to reveal the extent to which human activity...

Read Article
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