SeanPaul La Selle
Geologist with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 14
Radiocarbon, Cesium-137, Grain Size, and X-ray Fluorescence Data for Tsunami Geology Investigation, Driftwood Bay, Umnak Island, Alaska (2018) Radiocarbon, Cesium-137, Grain Size, and X-ray Fluorescence Data for Tsunami Geology Investigation, Driftwood Bay, Umnak Island, Alaska (2018)
This dataset consists of nine tables that include radiocarbon dates, Cesium-137 activity, grain size measurements, and scanning X-ray fluorescence element intensity counts.
Core logs, scans, photographs, grain size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua`i, O`ahu, and Hawai`i Core logs, scans, photographs, grain size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua`i, O`ahu, and Hawai`i
Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (for example, Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt along the coasts of these subduction zones are critical for assessing the hazard from distant...
Filter Total Items: 22
Onshore flow characteristics of the 1755 CE Lisbon tsunami: Linking forward and inverse numerical modeling Onshore flow characteristics of the 1755 CE Lisbon tsunami: Linking forward and inverse numerical modeling
The 1755 CE Lisbon earthquake triggered the largest historical tsunami ever impacting the Atlantic coasts of Europe. Despite recent efforts to better understand this event, there are still unanswered questions about the location of its epicenter and whether physical and historical evidences are in agreement. Inverse modeling using tsunami sediments can be applied to quantify onshore flow
Authors
Ivana Bosnic, Pedro Costa, Francisco Dourado, SeanPaul La Selle, Guy Gelfenbaum
Selective sediment transport during Hurricane Sandy on Fire Island (New York, USA): Inferences from heavy-mineral assemblages Selective sediment transport during Hurricane Sandy on Fire Island (New York, USA): Inferences from heavy-mineral assemblages
In October 2012, Hurricane Sandy caused severe erosion on beaches and dunes of Fire Island (New York, USA). Major shoreline changes occurred with erosional dominance in the upper shoreline and aggradation in the lowermost section of the beach due to the deposition of eroded upper beach and dune sediment. Sand laminations with a high concentration of heavy minerals (“black sand...
Authors
Joao Cascalho, Pedro Costa, Guy Gelfenbaum, SeanPaul La Selle, Bruce Jaffe
The roles of flow acceleration and deceleration in sediment suspension in the surf zone The roles of flow acceleration and deceleration in sediment suspension in the surf zone
Prediction of sediment suspension in the surf zone remains elusive. We explore how suspended sediment concentration at 19 cm above the bed in the mid-surf zone during a storm is influenced by flow acceleration and deceleration. There is a tendency for higher suspended sediment concentrations during onshore flow, with decelerating onshore flows having higher concentrations than steady...
Authors
Bruce Jaffe, SeanPaul La Selle
Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust
At the eastern end of the 1957 Andreanof Islands magnitude-8.6 earthquake rupture, Driftwood Bay (Umnak Island) and Stardust Bay (Sedanka Island) lie along presently locked and creeping parts of the Aleutian megathrust, respectively, based on satellite geodesy onshore. Both bays, located 200-km apart, face the Aleutian trench and harbor coastal evidence for tsunami inundation in 1957...
Authors
Robert C. Witter, Richard Briggs, Simon Engelhart, Guy Gelfenbaum, Richard Koehler, Alan Nelson, SeanPaul La Selle, Reide Corbett, Kristi Wallace
Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands
Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (e.g., Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt deposited by tsunamis in low-lying areas along Pacific coasts, even those distant from subduction...
Authors
SeanPaul La Selle, Bruce Richmond, Bruce Jaffe, Alan Nelson, Frances Griswold, Maria Arcos, Catherine Chague, James M. Bishop, Piero Bellanova, Haunani Kane, Brent D. Lunghino, Guy Gelfenbaum
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory, Sediment Lab Suite and Carbon Analysis Laboratory
Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i
Far‐field tsunami deposits observed in the Kahana Valley, O'ahu, Hawai'i (USA), were investigated for their organic‐geochemical content. During short high‐energy events, (tsunamis and storms) organic and chemical components are transported with sediment from marine to terrestrial areas. This study investigates the use of anthropogenic based organic geochemical compounds (such as...
Authors
Piero Bellanova, Mike Frenken, Bruce Richmond, Jan Schwarzbauer, SeanPaul La Selle, Frances Griswold, Bruce Jaffe, Alan Nelson, Klaus Reicherter
The application of microtextural and heavy mineral analysis to discriminate between storm and tsunami deposits The application of microtextural and heavy mineral analysis to discriminate between storm and tsunami deposits
Recent work has applied microtextural and heavy mineral analyses to sandy storm and tsunami deposits from Portugal, Scotland, Indonesia and the USA. We looked at the interpretation of microtextural imagery (scanning electron microscopy) of quartz grains and heavy mineral compositions. We consider inundation events of different chronologies and sources (the AD 1755 Lisbon and 2004 Indian...
Authors
Pedro Costa, Guy Gelfenbaum, Sue Dawson, SeanPaul La Selle, F Milne, J. Cascalho, C. Ponte Lira, C. Andrade, M. Freitas, Bruce Jaffe
Hurricane Sandy washover deposits on Fire Island, New York Hurricane Sandy washover deposits on Fire Island, New York
Washover deposits on Fire Island, New York, from Hurricane Sandy in 2012 were investigated a year after the storm to document the sedimentary characteristics of hurricane washover features. Sediment data collected in the field includes stratigraphic descriptions and photos from trenches, bulk sediment samples, U-channels, and gouge and push cores. Samples and push cores were further...
Authors
SeanPaul M. La Selle, Brent D. Lunghino, Bruce Jaffe, Guy Gelfenbaum, Pedro Costa
Uncertainty in tsunami sediment transport modeling Uncertainty in tsunami sediment transport modeling
Erosion and deposition from tsunamis record information about tsunami hydrodynamics and size that can be interpreted to improve tsunami hazard assessment. We explore sources and methods for quantifying uncertainty in tsunami sediment transport modeling. Uncertainty varies with tsunami, study site, available input data, sediment grain size, and model. Although uncertainty has the...
Authors
Bruce Jaffe, Kazuhisa Goto, Daisuke Sugawara, Guy Gelfenbaum, SeanPaul M. La Selle
Unusually large tsunamis frequent a currently creeping part of the Aleutian megathrust Unusually large tsunamis frequent a currently creeping part of the Aleutian megathrust
Current models used to assess earthquake and tsunami hazards are inadequate where creep dominates a subduction megathrust. Here we report geological evidence for large tsunamis, occurring on average every 300–340 years, near the source areas of the 1946 and 1957 Aleutian tsunamis. These areas bookend a postulated seismic gap over 200 km long where modern geodetic measurements indicate...
Authors
Robert C. Witter, G. Carver, Richard Briggs, Guy Gelfenbaum, R.D. Koehler, SeanPaul M. La Selle, Adrian Bender, S.E. Engelhart, E. Hemphill-Haley, Troy Hill
Science and Products
Filter Total Items: 14
Radiocarbon, Cesium-137, Grain Size, and X-ray Fluorescence Data for Tsunami Geology Investigation, Driftwood Bay, Umnak Island, Alaska (2018) Radiocarbon, Cesium-137, Grain Size, and X-ray Fluorescence Data for Tsunami Geology Investigation, Driftwood Bay, Umnak Island, Alaska (2018)
This dataset consists of nine tables that include radiocarbon dates, Cesium-137 activity, grain size measurements, and scanning X-ray fluorescence element intensity counts.
Core logs, scans, photographs, grain size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua`i, O`ahu, and Hawai`i Core logs, scans, photographs, grain size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua`i, O`ahu, and Hawai`i
Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (for example, Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt along the coasts of these subduction zones are critical for assessing the hazard from distant...
Filter Total Items: 22
Onshore flow characteristics of the 1755 CE Lisbon tsunami: Linking forward and inverse numerical modeling Onshore flow characteristics of the 1755 CE Lisbon tsunami: Linking forward and inverse numerical modeling
The 1755 CE Lisbon earthquake triggered the largest historical tsunami ever impacting the Atlantic coasts of Europe. Despite recent efforts to better understand this event, there are still unanswered questions about the location of its epicenter and whether physical and historical evidences are in agreement. Inverse modeling using tsunami sediments can be applied to quantify onshore flow
Authors
Ivana Bosnic, Pedro Costa, Francisco Dourado, SeanPaul La Selle, Guy Gelfenbaum
Selective sediment transport during Hurricane Sandy on Fire Island (New York, USA): Inferences from heavy-mineral assemblages Selective sediment transport during Hurricane Sandy on Fire Island (New York, USA): Inferences from heavy-mineral assemblages
In October 2012, Hurricane Sandy caused severe erosion on beaches and dunes of Fire Island (New York, USA). Major shoreline changes occurred with erosional dominance in the upper shoreline and aggradation in the lowermost section of the beach due to the deposition of eroded upper beach and dune sediment. Sand laminations with a high concentration of heavy minerals (“black sand...
Authors
Joao Cascalho, Pedro Costa, Guy Gelfenbaum, SeanPaul La Selle, Bruce Jaffe
The roles of flow acceleration and deceleration in sediment suspension in the surf zone The roles of flow acceleration and deceleration in sediment suspension in the surf zone
Prediction of sediment suspension in the surf zone remains elusive. We explore how suspended sediment concentration at 19 cm above the bed in the mid-surf zone during a storm is influenced by flow acceleration and deceleration. There is a tendency for higher suspended sediment concentrations during onshore flow, with decelerating onshore flows having higher concentrations than steady...
Authors
Bruce Jaffe, SeanPaul La Selle
Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust
At the eastern end of the 1957 Andreanof Islands magnitude-8.6 earthquake rupture, Driftwood Bay (Umnak Island) and Stardust Bay (Sedanka Island) lie along presently locked and creeping parts of the Aleutian megathrust, respectively, based on satellite geodesy onshore. Both bays, located 200-km apart, face the Aleutian trench and harbor coastal evidence for tsunami inundation in 1957...
Authors
Robert C. Witter, Richard Briggs, Simon Engelhart, Guy Gelfenbaum, Richard Koehler, Alan Nelson, SeanPaul La Selle, Reide Corbett, Kristi Wallace
Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands
Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (e.g., Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt deposited by tsunamis in low-lying areas along Pacific coasts, even those distant from subduction...
Authors
SeanPaul La Selle, Bruce Richmond, Bruce Jaffe, Alan Nelson, Frances Griswold, Maria Arcos, Catherine Chague, James M. Bishop, Piero Bellanova, Haunani Kane, Brent D. Lunghino, Guy Gelfenbaum
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Core Preparation and Analysis Laboratory and Sample Repositories, Multi-Sensor Core Logger Laboratory, Sediment Lab Suite and Carbon Analysis Laboratory
Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i
Far‐field tsunami deposits observed in the Kahana Valley, O'ahu, Hawai'i (USA), were investigated for their organic‐geochemical content. During short high‐energy events, (tsunamis and storms) organic and chemical components are transported with sediment from marine to terrestrial areas. This study investigates the use of anthropogenic based organic geochemical compounds (such as...
Authors
Piero Bellanova, Mike Frenken, Bruce Richmond, Jan Schwarzbauer, SeanPaul La Selle, Frances Griswold, Bruce Jaffe, Alan Nelson, Klaus Reicherter
The application of microtextural and heavy mineral analysis to discriminate between storm and tsunami deposits The application of microtextural and heavy mineral analysis to discriminate between storm and tsunami deposits
Recent work has applied microtextural and heavy mineral analyses to sandy storm and tsunami deposits from Portugal, Scotland, Indonesia and the USA. We looked at the interpretation of microtextural imagery (scanning electron microscopy) of quartz grains and heavy mineral compositions. We consider inundation events of different chronologies and sources (the AD 1755 Lisbon and 2004 Indian...
Authors
Pedro Costa, Guy Gelfenbaum, Sue Dawson, SeanPaul La Selle, F Milne, J. Cascalho, C. Ponte Lira, C. Andrade, M. Freitas, Bruce Jaffe
Hurricane Sandy washover deposits on Fire Island, New York Hurricane Sandy washover deposits on Fire Island, New York
Washover deposits on Fire Island, New York, from Hurricane Sandy in 2012 were investigated a year after the storm to document the sedimentary characteristics of hurricane washover features. Sediment data collected in the field includes stratigraphic descriptions and photos from trenches, bulk sediment samples, U-channels, and gouge and push cores. Samples and push cores were further...
Authors
SeanPaul M. La Selle, Brent D. Lunghino, Bruce Jaffe, Guy Gelfenbaum, Pedro Costa
Uncertainty in tsunami sediment transport modeling Uncertainty in tsunami sediment transport modeling
Erosion and deposition from tsunamis record information about tsunami hydrodynamics and size that can be interpreted to improve tsunami hazard assessment. We explore sources and methods for quantifying uncertainty in tsunami sediment transport modeling. Uncertainty varies with tsunami, study site, available input data, sediment grain size, and model. Although uncertainty has the...
Authors
Bruce Jaffe, Kazuhisa Goto, Daisuke Sugawara, Guy Gelfenbaum, SeanPaul M. La Selle
Unusually large tsunamis frequent a currently creeping part of the Aleutian megathrust Unusually large tsunamis frequent a currently creeping part of the Aleutian megathrust
Current models used to assess earthquake and tsunami hazards are inadequate where creep dominates a subduction megathrust. Here we report geological evidence for large tsunamis, occurring on average every 300–340 years, near the source areas of the 1946 and 1957 Aleutian tsunamis. These areas bookend a postulated seismic gap over 200 km long where modern geodetic measurements indicate...
Authors
Robert C. Witter, G. Carver, Richard Briggs, Guy Gelfenbaum, R.D. Koehler, SeanPaul M. La Selle, Adrian Bender, S.E. Engelhart, E. Hemphill-Haley, Troy Hill