Tsunami trimlines identified across different islands of the Tonga archipelago (NERC Grant NE/X002454/1)
Tsunami trimlines identified across different islands of the Tonga archipelago. Trimlines have been used as a reference land feature following the January 2022 Tonga tsunami event that ripped off vegetation and built-up areas. Trimlines are distinctive limits between an area with sand coverage, vegetation destruction, and soil erosion on the one hand, and the unaffected natural vegetation on the other. This distinction provides a good landmark to map the inundation width and the landward extension of tsunami runup. In this case, the trimlines have been manually delineated by BGS - Earth Observation team using different high-resolution satellite datasets both optical (KompSat, Planet, Pleiades, WorldView) and radar (TerraSAR-X). Trimlines are well known from task-force publications documenting recent tsunami detection efforts and provide key information to support tsunami triggering mechanism models. For more info, see https://www.usgs.gov/media/images/tsunami-terms and Scheffers et al. (2012), https://doi.org/10.1007/s11069-010-9691-6
dataset
:
http://data.bgs.ac.uk/id/dataHolding/13608013
English
Geoscientific information
GEMET - INSPIRE themes, version 1.0:
BGS Thesaurus of Geosciences:
Satellite imagery
Tsunamis
NGDC Deposited Data
Free:
Free:
NERC_DDC
-175.3500,
-21.1000,
-174.7000,
-20.2500
TO, TON, TONGA [id=936000]
creation: 2022-11-24
2022-01-16
-
2022-04-25
vector
British Geological Survey
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British Geological Survey
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Environmental Science Centre, Nicker Hill, Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: 0115 936 3143
email:
enquiries@bgs.ac.uk
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British Geological Survey
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British Geological Survey
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Data Quality
We manually analysed high-resolution optical (KompSat, Planet, Pleiades, WorldView) and radar (TerraSAR-X) and draw the lines.
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
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Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
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Metadata about metadata
f19549a8-8d3f-5588-e053-0937940a790b
British Geological Survey
Environmental Science Centre,Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: +44 115 936 3100
email:
enquiries@bgs.ac.uk
Role: point of contact
2024-04-24