The role of Holocene relative sea-level change in preserving records of subduction zone earthquakes
- Dura, Tina
- Engelhart, Simon E.
- Vacchi, Matteo
- Horton, Benjamin Peter
- Kopp, Robert E.
- Peltier, William Richard
- Bradley, Sarah
DOIAbstract
Eustasy and glacio- and hydro-isostatic adjustment are the main drivers of regional variability of Holocene relative sea-level (RSL) records. These regional variations in Holocene RSL influence the preservation of coastal wetland stratigraphic records of prehistoric earthquakes along subduction zone coasts. The length and completeness of prehistoric earthquake records is intrinsically linked to the accommodation space provided by gradually rising (<3 mm/year) Holocene RSL. In near-field regions that were located beneath northern hemisphere ice sheets (e.g., western Vancouver Island), RSL fall from a mid-Holocene highstand has limited prehistoric earthquake records to the last 1 ka. In intermediate field regions (e.g., southern Washington an...
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