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Earthquake clustering and energy release of the African–Arabian rift system

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.
0037-1106
155-162
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
5b4eeb35-d229-4325-8940-d934dab7563d
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
5b4eeb35-d229-4325-8940-d934dab7563d

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), 155-162. (doi:10.1785/0120160343).

Record type: Article

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

Identifiers

Local EPrints ID: 417569
URI: https://eprints.soton.ac.uk/id/eprint/417569
ISSN: 0037-1106
PURE UUID: 2ef47960-a8f7-45b0-9d70-e3d39c11dacd
ORCID for Derek Keir: ORCID iD orcid.org/0000-0001-8787-8446

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Date deposited: 05 Feb 2018 17:30
Last modified: 06 Jun 2018 12:31

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Contributors

Author: Thomas R Hall
Author: Casey Nixon
Author: Derek Keir ORCID iD
Author: Paul W. Burton
Author: Atalay Ayele

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