Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust
Large to great earthquakes and related tsunamis generated on the Alaska megathrust produce major hazards for both the area of rupture and heavily populated coastlines around much of the Pacific Ocean. Recent modeling studies suggest that single-segment ruptures,as well as multi-segment, 1964-type ru...
Published in: | Geology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Geological Society of America
2014
|
Subjects: | |
Online Access: | https://nrl.northumbria.ac.uk/id/eprint/16718/ https://doi.org/10.1130/G35797.1 |
id |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:16718 |
---|---|
record_format |
openpolar |
spelling |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:16718 2023-05-15T17:04:35+02:00 Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust Shennan, Ian Barlow, Natasha Carver, Gary Davies, Frank Garrett, Ed Hocking, Emma 2014-08-09 https://nrl.northumbria.ac.uk/id/eprint/16718/ https://doi.org/10.1130/G35797.1 unknown Geological Society of America Shennan, Ian, Barlow, Natasha, Carver, Gary, Davies, Frank, Garrett, Ed and Hocking, Emma (2014) Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust. Geology, 42 (8). pp. 687-690. ISSN 1943-2682 F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2014 ftunivnorthumb https://doi.org/10.1130/G35797.1 2022-09-25T05:59:31Z Large to great earthquakes and related tsunamis generated on the Alaska megathrust produce major hazards for both the area of rupture and heavily populated coastlines around much of the Pacific Ocean. Recent modeling studies suggest that single-segment ruptures,as well as multi-segment, 1964-type ruptures, can produce great earthquakes, >M8, and significant hazards both in the near field and to distant locations through the generation of tsunamis. We present new paleoseismological data from Kodiak Island and a new analysis of radiocarbon data based on Bayesian age modeling to combine our observations with previous geological, historical, and archaeological investigations. We suggest that, in addition to multi-segment ruptures in A.D. 1964 and 1020–1150 (95% age estimate), a single-segment rupture occurred in 1788, with coseismic land-surface deformation across Kodiak Island and a tsunami that is recorded in historical documents and in sediment sequences, and another, similar rupture of the same Kodiak segment at A.D. 1440–1620. These indicate shorter intervals between ruptures of the Kodiak segment than previously assumed, and more frequent ruptures than for the Prince William Sound segment. Article in Journal/Newspaper Kodiak Alaska Northumbria University, Newcastle: Northumbria Research Link (NRL) Pacific Geology 42 8 687 690 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
unknown |
topic |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Shennan, Ian Barlow, Natasha Carver, Gary Davies, Frank Garrett, Ed Hocking, Emma Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
topic_facet |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Large to great earthquakes and related tsunamis generated on the Alaska megathrust produce major hazards for both the area of rupture and heavily populated coastlines around much of the Pacific Ocean. Recent modeling studies suggest that single-segment ruptures,as well as multi-segment, 1964-type ruptures, can produce great earthquakes, >M8, and significant hazards both in the near field and to distant locations through the generation of tsunamis. We present new paleoseismological data from Kodiak Island and a new analysis of radiocarbon data based on Bayesian age modeling to combine our observations with previous geological, historical, and archaeological investigations. We suggest that, in addition to multi-segment ruptures in A.D. 1964 and 1020–1150 (95% age estimate), a single-segment rupture occurred in 1788, with coseismic land-surface deformation across Kodiak Island and a tsunami that is recorded in historical documents and in sediment sequences, and another, similar rupture of the same Kodiak segment at A.D. 1440–1620. These indicate shorter intervals between ruptures of the Kodiak segment than previously assumed, and more frequent ruptures than for the Prince William Sound segment. |
format |
Article in Journal/Newspaper |
author |
Shennan, Ian Barlow, Natasha Carver, Gary Davies, Frank Garrett, Ed Hocking, Emma |
author_facet |
Shennan, Ian Barlow, Natasha Carver, Gary Davies, Frank Garrett, Ed Hocking, Emma |
author_sort |
Shennan, Ian |
title |
Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
title_short |
Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
title_full |
Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
title_fullStr |
Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
title_full_unstemmed |
Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust |
title_sort |
great tsunamigenic earthquakes during the past 1000 years in the alaska megathrust |
publisher |
Geological Society of America |
publishDate |
2014 |
url |
https://nrl.northumbria.ac.uk/id/eprint/16718/ https://doi.org/10.1130/G35797.1 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_relation |
Shennan, Ian, Barlow, Natasha, Carver, Gary, Davies, Frank, Garrett, Ed and Hocking, Emma (2014) Great tsunamigenic earthquakes during the past 1000 years in the Alaska megathrust. Geology, 42 (8). pp. 687-690. ISSN 1943-2682 |
op_doi |
https://doi.org/10.1130/G35797.1 |
container_title |
Geology |
container_volume |
42 |
container_issue |
8 |
container_start_page |
687 |
op_container_end_page |
690 |
_version_ |
1766058884870438912 |