Seismic observations of glaciogenic ocean waves (micro-tsunamis) on icebergs and ice shelves

MacAyeal, Douglas R.; Okal, Emile A.; Aster, R. C.; Bassis, J. N.

doi:10.3189/002214309788608679

Cited by 62 publications

(90 citation statements)

References 49 publications

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“…Similar cryoseismic phenomena have also been reported around the Ross Sea region (MacAyeal et al, 2009), the marginal sea of the Antarctic Peninsula [33], as well as the continental margin of Dronning Maud Land [17]. In particular, iceberg-originated harmonic tremor emanating from tabular icebergs was observed by both seismo-acoustic and local broadband seismic signals [35].…”

Section: Ice-quakes Glacial Earthquakessupporting

confidence: 71%

“…In particular, iceberg-originated harmonic tremor emanating from tabular icebergs was observed by both seismo-acoustic and local broadband seismic signals [35]. The tremor signals consisted of extended episodes of stick-slip ice-quakes generated when the ice-cliff edges of two tabular icebergs rubbed together during glancing, "strike-slip" type iceberg collisions.…”

Section: Ice-quakes Glacial Earthquakesmentioning

confidence: 99%

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Seismicity in the Antarctic Continent and Surrounding Ocean

Kanao¹

2014

OJER

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Seismicity in the Antarctic and surrounding ocean is evaluated based on the compiling data by the International Seismological Centre (ISC). The Antarctic continent and surrounding ocean have been believed to be one of the aseismic regions of the Earth for many decades. However, according to the development of Global Seismic Networks and local seismic arrays, the number of tectonic earthquakes detected in and around the Antarctic continent has been increased. A total of 13 seismicity areas are classified into the Antarctic continent (3 areas) and oceanic regions within the Antarctic Plate (10 areas). In general, seismic activity in the continental areas is very low in Antarctica. However, a few small earthquakes are identified. Wilkes Land in East Antarctica is the most tectonically active area in the continent, with several small earthquake events having been detected during the last four decades. In the oceanic region, in contrast, seismic activity in the area of 120˚-60˚ W sector is three times higher than that in the other oceanic areas. This may be considered to be involved in a tectonic stress concentration toward the Easter Island Triple Junction between the Antarctic Plate, the Pacific Plate and the Nazuca micro-Plate. Three volcanic areas, moreover, the Deception Island, the Mts. Erebus and Melbourn, are also found to be high seismic activities in contrast with surrounding vicinity areas.

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Section: Ice-quakes Glacial Earthquakessupporting

confidence: 71%

Section: Ice-quakes Glacial Earthquakesmentioning

confidence: 99%

Seismicity in the Antarctic Continent and Surrounding Ocean

Kanao¹

2014

OJER

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“…Swell propagates dispersively across ocean basins, which results in longer period swell arriving at the coast before the shorter period swell. This period-dependent delay is readily measured in data recorded by seismic stations, ocean buoys, and seismographs, such as those deployed recently on a giant Antarctic iceberg (MacAyeal et al, 2009). …”

Section: Seismic Signals From the Oceanmentioning

confidence: 99%

“…Similar (Muller and Eckstaller, 2003). In particular, iceberg-originated harmonic tremor emanating from tabular icebergs was observed by both seismo-acoustic and local broadband seismic signals (MacAyeal et al, 2009). The tremor signals consisted of extended episodes of stick-slip ice-quakes generated when the ice-cliff edges of two tabular icebergs rubbed together during glancing, «strike-slip» iceberg collisions.…”

Section: Glacial Earthquakes In Polar Regionsmentioning

confidence: 99%

Seismic Wave Interactions Between the Atmosphere - Ocean - Cryosphere System and the Geosphere in Polar Regions

Kanao¹,

Maggi²,

Ishihara³

et al. 2012

Seismic Waves - Research and Analysis

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“…rocking, capsizing, rolling, collapsing) that can generate waves. Tsunamis generated by icebergs are frequently observed in parts of Antarctica and Greenland, where they routinely have wave heights of 2 m or so [1,2,40]. However, their occurrence and geomorphic significance over longer (Holocene) timescales have not previously been studied.…”

Section: Introductionmentioning

confidence: 99%

Sedimentary evidence for a mid-Holocene iceberg-generated tsunami in a coastal lake, west Greenland

Long

Szczuciński

Lawrence

2015

Arktos

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4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract We report sedimentological evidence for a tsunami from a coastal lake at Innaarsuit, Disko Bugt (west Greenland), which was most likely generated by a rolling iceberg. The tsunami invaded the lake c. 6000 years ago, during a period of time when relative sea level (RSL) was falling quickly because of isostatic rebound. We use the background rate of RSL fall, together with an age model for the sediment sequence, to infer a minimum wave runup during the event of c. 3.3 m. The stratigraphic signature of the event bears similarities to that described from studies of the early-Holocene Storegga slide tsunami in Norwegian coastal basins. Conditions conducive to iceberg tsunami include a supply of icebergs, deep water close to the shore, a depositional setting protected from storms or landslide tsunami, and a coastal configuration that has the potential to amplify the height of tsunami waves as water depths shallow and the waves approach and impact the coast. Future warming of polar regions will lead to increased calving and iceberg production, at a time when human use of polar coasts will also grow. We predict, therefore, that iceberg-generated tsunami will become a growing hazard in polar coastal waters, especially in areas adjacent to large, fast-flowing, marine-terminating ice streams that are close to human populations or infrastructure.

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Seismic observations of glaciogenic ocean waves (micro-tsunamis) on icebergs and ice shelves

Cited by 62 publications

References 49 publications

Seismicity in the Antarctic Continent and Surrounding Ocean

Seismicity in the Antarctic Continent and Surrounding Ocean

Seismic Wave Interactions Between the Atmosphere - Ocean - Cryosphere System and the Geosphere in Polar Regions

Sedimentary evidence for a mid-Holocene iceberg-generated tsunami in a coastal lake, west Greenland

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