Earthquake clustering and energy release of the African–Arabian rift system
Earthquake clustering and energy release of the African–Arabian rift system
The earthquakes associated with continental deformation are spatially and temporally variable and are fundamental in understanding fault activity and seismogenic hazards. We conduct KK ‐means cluster analysis on seismicity in the African–Arabian rift systems to create the first computationally objective analysis of the pattern of earthquakes. We use seismic moment to compute spatial variations in maximum credible earthquake (Mcred) and likely time to the next major release of seismic energy. Our best‐fit model has 32 clusters of ∼100–400 km∼100–400 km in length, with cluster size decreasing northward along the rift and cluster boundaries correlating with major structural segmentation of the rift. Mcred varies between MwMw 5.2 and 7.4 across the whole dataset, with the highest values estimated in portions of the rift where the majority of extension is accommodated by seismogenic failure.
155-162
Hall, Thomas R
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Nixon, Casey
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Keir, Derek
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Burton, Paul W.
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Ayele, Atalay
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February 2018
Hall, Thomas R
c7ff608d-cc1d-4077-bae0-4614d753c1c9
Nixon, Casey
18e290c7-3f4b-43d0-9118-0f3ac926aadd
Keir, Derek
5616f81f-bf1b-4678-a167-3160b5647c65
Burton, Paul W.
61e6c3db-b42f-4a5d-9ac6-0703c797ffd9
Ayele, Atalay
730f62fb-c461-4a4e-b52d-b143a7936df6
Hall, Thomas R, Nixon, Casey, Keir, Derek, Burton, Paul W. and Ayele, Atalay
(2018)
Earthquake clustering and energy release of the African–Arabian rift system.
Bulletin of the Seismological Society of America, 108 (1), .
(doi:10.1785/0120160343).
Abstract
The earthquakes associated with continental deformation are spatially and temporally variable and are fundamental in understanding fault activity and seismogenic hazards. We conduct KK ‐means cluster analysis on seismicity in the African–Arabian rift systems to create the first computationally objective analysis of the pattern of earthquakes. We use seismic moment to compute spatial variations in maximum credible earthquake (Mcred) and likely time to the next major release of seismic energy. Our best‐fit model has 32 clusters of ∼100–400 km∼100–400 km in length, with cluster size decreasing northward along the rift and cluster boundaries correlating with major structural segmentation of the rift. Mcred varies between MwMw 5.2 and 7.4 across the whole dataset, with the highest values estimated in portions of the rift where the majority of extension is accommodated by seismogenic failure.
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e-pub ahead of print date: 9 January 2018
Published date: February 2018
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Local EPrints ID: 417569
URI: http://eprints.soton.ac.uk/id/eprint/417569
ISSN: 0037-1106
PURE UUID: 2ef47960-a8f7-45b0-9d70-e3d39c11dacd
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Date deposited: 05 Feb 2018 17:30
Last modified: 16 Mar 2024 04:06
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Author:
Thomas R Hall
Author:
Casey Nixon
Author:
Paul W. Burton
Author:
Atalay Ayele
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