title: Variable Holocene deformation above a shallow subduction zone extremely close to the trench.
abstract: Histories of vertical crustal motions at convergent margins offer fundamental insights into the relationship between interplate slip and permanent deformation. Moreover, past abrupt motions are proxies for potential tsunamigenic earthquakes and benefit hazard assessment. Well-dated records are required to understand the relationship between past earthquakes and Holocene vertical deformation. Here we measure elevations and (230)Th ages of in situ corals raised above the sea level in the western Solomon Islands to build an uplift event history overlying the seismogenic zone, extremely close to the trench (4-40 km). We find marked spatiotemporal heterogeneity in uplift from mid-Holocene to present: some areas accrue more permanent uplift than others. Thus, uplift imposed during the 1 April 2007 Mw 8.1 event may be retained in some locations but removed in others before the next megathrust rupture. This variability suggests significant changes in strain accumulation and the interplate thrust process from one event to the next.
authors.affiliation: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, J. J. Pickle Research Campus, Building 196, 10100 Burnet Road (R2200), Austin, Texas 78758, USA.|Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, 1 University Station C9000, Austin, Texas 78712, USA.
authors.forename: Kaustubh
authors.identifier: http://orcid.org/0000-0002-7875-4182
authors.initials: K
authors.lastname: Thirumalai
authors.affiliation: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, J. J. Pickle Research Campus, Building 196, 10100 Burnet Road (R2200), Austin, Texas 78758, USA.
authors.forename: Frederick W
authors.initials: FW
authors.lastname: Taylor
authors.affiliation: Department of Geosciences, High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), National Taiwan University, Taipei, Taiwan 10617.
authors.forename: Chuan-Chou
authors.initials: CC
authors.lastname: Shen
authors.affiliation: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, J. J. Pickle Research Campus, Building 196, 10100 Burnet Road (R2200), Austin, Texas 78758, USA.|Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, 1 University Station C9000, Austin, Texas 78712, USA.
authors.forename: Luc L
authors.initials: LL
authors.lastname: Lavier
authors.affiliation: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, J. J. Pickle Research Campus, Building 196, 10100 Burnet Road (R2200), Austin, Texas 78758, USA.
authors.forename: Cliff
authors.initials: C
authors.lastname: Frohlich
authors.affiliation: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, J. J. Pickle Research Campus, Building 196, 10100 Burnet Road (R2200), Austin, Texas 78758, USA.
authors.forename: Laura M
authors.initials: LM
authors.lastname: Wallace
authors.affiliation: Department of Geosciences, High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), National Taiwan University, Taipei, Taiwan 10617.
authors.forename: Chung-Che
authors.initials: CC
authors.lastname: Wu
authors.affiliation: Department of Geosciences, High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), National Taiwan University, Taipei, Taiwan 10617.|The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Sun
authors.affiliation: Department of Mines, Energy, and Water Resources, PO Box G37, Honiara, Solomon Islands.
authors.forename: Alison K
authors.initials: AK
authors.lastname: Papabatu