Seismic Waves - Research and Analysis

Kanao, Masaki

doi:10.5772/1400

Cited by 12 publications

(7 citation statements)

References 112 publications

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“…Local seismicity around the LHB was reported by [16] (Figure 3). The seventeen events, except for the 1996.…”

Section: Velocity Discontinuities In the Upper Mantlementioning

confidence: 84%

“…Several kinds of natural seismic signals connected to the atmosphere-ocean-cryosphere system can be detected in polar regions. The movement of ice is capable of causing small magnitude earthquakes, generally labeled "ice-quakes" (or "ice-shocks") for their relationship to glacial dynamics [15,16]. Such kinds of cryoseismic sources are considered to have been composed of the movement of ice sheets, sea-ice, oceanic tide-cracks, oceanic gravity waves, icebergs and the calving fronts of ice caps.…”

Section: Retrieved Data and Major Scientific Targetsmentioning

confidence: 99%

“…The evidence can be explained by the sea-ice extent impeding both the direct ocean-to-continent coupling and the coastal reflection. Microseism studies of Antarctica using IPY data have recently been undertaken with fruitful results [16,20].…”

Section: Retrieved Data and Major Scientific Targetsmentioning

confidence: 99%

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Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Kanao¹,

Yamada²,

Toyokuni³

2013

IJG

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Deployments of seismic stations in Antarctica are an ambitious project to improve the spatial resolution of the Antarctic Plate and surrounding regions. Several international programs had been conducted in wide area of the Antarctic continent during the International Polar Year (IPY 2007(IPY -2008. The "Antarctica's GAmburtsev Province (AGAP)", the "GAmburtsev Mountain SEISmic experiment (GAMSEIS)" as a part of AGAP, and the "Polar Earth Observing Network (POLENET)" were major contributions to the IPY. The AGAP/GAMSEIS was an internationally coordinated deployments of more than few tens of broadband seismographs over the wide area of East Antarctica. Detailed information on crustal thickness and mantle structure provides key constraints on an origin of the Gamburtsev Mountains; and more broad structure and evolution of the East Antarctic craton and sub-glacial environment. From POLENET data obtained, local and regional signals associated with ice movements were recorded together with a significant number of teleseismic events. Moreover, seismic deployments have been carried out in the Lützow-Holm Bay (LHB), East Antarctica, by Japanese activities. The recorded teleseismic and local events are of sufficient quality to image the structure and dynamics of the crust and mantle, such as the studies by receiver functions suggesting a heterogeneous upper mantle. In addition to studies on the shallow part of the Earth, we place emphasis on these seismic deployments' ability to image the Earth's deep interior, as viewed from Antarctica, as a large aperture array in the southern high latitude.

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“…Local seismicity around the LHB was reported by [16] (Figure 3). The seventeen events, except for the 1996.…”

Section: Velocity Discontinuities In the Upper Mantlementioning

confidence: 84%

Section: Retrieved Data and Major Scientific Targetsmentioning

confidence: 99%

See 1 more Smart Citation

Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Kanao¹,

Yamada²,

Toyokuni³

2013

IJG

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“…The long-duration sea-ice tremors had very distinct spectral characteristics that distinguished them clearly from ordinary teleseismic and/or local tectonic events. Several sequences of harmonic over-toned signals, presumably associated with the merging of multiple ice volumes, appeared on the seismic signals [34]. The characteristic signals also represent the surge events that seem more closely related to the break-up process of the sea-ice mass volume.…”

Section: Ice-quakes Glacial Earthquakesmentioning

confidence: 99%

“…For example, a large volume of sea ice was discharged from LHB during the 1997 austral winter, and clearly imaged by the NOAA satellite. The broadband seismographs at Syowa Station recorded distinct waveforms associated with the discharge events [34]. The long-duration sea-ice tremors had very distinct spectral characteristics that distinguished them clearly from ordinary teleseismic and/or local tectonic events.…”

Section: Ice-quakes Glacial Earthquakesmentioning

confidence: 99%

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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Cryoseismology

Podolskiy

Walter

2016

Reviews of Geophysics

213

209

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The last decade witnessed an explosion in yearly number of publications on passive glacier seismology. The seismic signals from a wide range of glacier‐related processes fill a broad band of frequencies (from 10−3 to 102 Hz) and moment magnitudes (from M–3 to M7) providing a fresh and unprecedented view on fundamental processes in the cryosphere. New insights into basal motion, iceberg calving, glacier, iceberg, and sea ice dynamics, and precursory signs of unstable glaciers and ice structural changes are being discovered with seismological techniques. These observations offer an invaluable foundation for understanding ongoing environmental changes and for future monitoring of ice bodies worldwide. In this review we discuss seismic sources in the cryosphere as well as research challenges for the near future. The field of glacier seismology is evolving so rapidly that some parts of this review will likely soon be outdated. Nevertheless, given an overwhelming number of recent publications and rapidly growing seismic data volumes provided by modern seismic installations in polar and mountain regions, this introduction to cryosphere seismicity aims to serve as a timely and comprehensive reference for glaciologists and seismologists.

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Seismic Waves - Research and Analysis

Cited by 12 publications

References 112 publications

Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Seismicity in the Antarctic Continent and Surrounding Ocean

Cryoseismology

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Seismic Waves - Research and Analysis

Cited by 12 publications

References 112 publications

Passive Seismic Deployments from the L&#252;tzow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Passive Seismic Deployments from the L&#252;tzow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Seismicity in the Antarctic Continent and Surrounding Ocean

Cryoseismology

Contact Info

Product

Resources

About

Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity

Passive Seismic Deployments from the Lützow-Holm Bay to Inland Plateau of East Antarctica: The Japanese IPY Contribution to Structure and Seismicity