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Flank collapses and tsunami hazard in the Antilles Arc

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Flank collapses and tsunami hazard in the Antilles Arc. / Teeuw, Richard Michael; Rust, Derek John; Solana, Maria Del Carmen; Dewdney, Christopher; Robertson, R.

2009. 6389 Abstract from EGU General Assembly, Vienna, United Kingdom.

Research output: Contribution to conferenceAbstract

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Teeuw RM, Rust DJ, Solana MDC, Dewdney C, Robertson R. Flank collapses and tsunami hazard in the Antilles Arc. 2009. Abstract from EGU General Assembly, Vienna, United Kingdom.

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@conference{8d386d5bac7349e384c52cc1bd786b39,
title = "Flank collapses and tsunami hazard in the Antilles Arc",
abstract = "We highlight potentially tsunamigenic volcanic flank instability on the north coast of Dominica in the Lesser Antilles arc. 3-D views from Google Earth were key to the initial recognition of this hazardous terrain. Seismic, bathymetric and geomorphological data suggest that this coast is bounded by an active fault structure, with the relatively up-thrown flank displaying evidence of both shallow translational and deep-seated rotational slope instability. A probable landslide block of ˜1 M tonnes on the seaward margin of the instability complex has large tension cracks on its upslope margin, clearly visible on Quickbird satellite imagery and X-band SRTM digital elevation models . Failure of this block could destabilise a larger adjacent upslope block (˜3 M tonnes). Preliminary calculations indicate that landslides at these scales could trigger tsunami waves, locally reaching up to 4 m in height, with the greatest hazard along the southern coast of Guadeloupe, 30-40 km to the north of Dominica.",
author = "Teeuw, {Richard Michael} and Rust, {Derek John} and Solana, {Maria Del Carmen} and Christopher Dewdney and R. Robertson",
year = "2009",
language = "English",
pages = "6389",
note = "EGU General Assembly ; Conference date: 19-04-2009 Through 24-04-2009",

}

RIS

TY - CONF

T1 - Flank collapses and tsunami hazard in the Antilles Arc

AU - Teeuw, Richard Michael

AU - Rust, Derek John

AU - Solana, Maria Del Carmen

AU - Dewdney, Christopher

AU - Robertson, R.

PY - 2009

Y1 - 2009

N2 - We highlight potentially tsunamigenic volcanic flank instability on the north coast of Dominica in the Lesser Antilles arc. 3-D views from Google Earth were key to the initial recognition of this hazardous terrain. Seismic, bathymetric and geomorphological data suggest that this coast is bounded by an active fault structure, with the relatively up-thrown flank displaying evidence of both shallow translational and deep-seated rotational slope instability. A probable landslide block of ˜1 M tonnes on the seaward margin of the instability complex has large tension cracks on its upslope margin, clearly visible on Quickbird satellite imagery and X-band SRTM digital elevation models . Failure of this block could destabilise a larger adjacent upslope block (˜3 M tonnes). Preliminary calculations indicate that landslides at these scales could trigger tsunami waves, locally reaching up to 4 m in height, with the greatest hazard along the southern coast of Guadeloupe, 30-40 km to the north of Dominica.

AB - We highlight potentially tsunamigenic volcanic flank instability on the north coast of Dominica in the Lesser Antilles arc. 3-D views from Google Earth were key to the initial recognition of this hazardous terrain. Seismic, bathymetric and geomorphological data suggest that this coast is bounded by an active fault structure, with the relatively up-thrown flank displaying evidence of both shallow translational and deep-seated rotational slope instability. A probable landslide block of ˜1 M tonnes on the seaward margin of the instability complex has large tension cracks on its upslope margin, clearly visible on Quickbird satellite imagery and X-band SRTM digital elevation models . Failure of this block could destabilise a larger adjacent upslope block (˜3 M tonnes). Preliminary calculations indicate that landslides at these scales could trigger tsunami waves, locally reaching up to 4 m in height, with the greatest hazard along the southern coast of Guadeloupe, 30-40 km to the north of Dominica.

M3 - Abstract

SP - 6389

T2 - EGU General Assembly

Y2 - 19 April 2009 through 24 April 2009

ER -

ID: 2223890