Numerical modeling of seismic waves for estimating the influence of the Greenland ice sheet on observed seismograms

Toyokuni, Genti; Takenaka, Hiroshi; Kanao, Masaki; Tsuboi, Seiji; Tono, Yoko

doi:10.1016/j.polar.2014.12.001

Cited by 10 publications

(11 citation statements)

References 20 publications

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“…The phenomenon of trapped and guided waves has also been observed for earthquake signals traveling through the Greenland Ice Sheet [ Toyokuni et al , ]. A characteristic type of ice sheet‐guided S wave, resulting from superimposition of surface/bed reflections, was proposed and named “Le.” Due to the influence of the ice sheet, records of deep teleseismic earthquakes may thus appear with amplified high‐frequency content [ Tsuboi et al , ].…”

Section: Future Directions and Research Frontiersmentioning

confidence: 99%

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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 The field of glacier seismology is evolving so rapidly that some parts of this review will likely soon be outdated.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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Section: Future Directions and Research Frontiersmentioning

confidence: 99%

“…The phenomenon of trapped and guided waves has also been observed for earthquake signals traveling through the Greenland Ice Sheet [Toyokuni et al, 2015a]. A characteristic type of ice sheet-guided S wave, resulting from superimposition of surface/bed reflections, was proposed and named "Le."…”

Section: Other Passive Techniquesmentioning

confidence: 99%

Cryoseismology

Podolskiy

Walter

2016

Reviews of Geophysics

213

209

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“…The estimation of the inner structure of the Earth by using the quasi-axisymmetric method was actually acquired through the broadband seismic data from AGAP/POLENET [8]. The same wave modeling method was expanded to the local area and applied to the data from Greenland (GLISN; see Chapters 2 and 7) [9] (Figure 2). By adding the information on the thickness of the ice sheet and bedrock topography, the generating scheme of the waves propagating inside the ice sheet (the "ice waves") was theoretically demonstrated.…”

Section: Global Seismic Wave Propagationmentioning

confidence: 99%

“…Observed and theoretical seismic waveforms at the GLISN stations (hypocenter); Fiji earthquake (Sep 15, 2011; M = 7.3 and depth = 630 km) (modified after Toyokuni et al[9]). Copyright Clearance Center (CCC, http://www.…”

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confidence: 99%

Summary: Global Seismology and the Polar Region

Kanao¹

2018

Polar Seismology - Advances and Impact

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Polar Seismology" has been developed since the International Geophysical Year (IGY 1957-1958) and contributed significantly to global seismology in particular through the big project of the International Polar Year (IPY 2007-2008). At present, in the first stage of the twenty-first century, "polar regions" play an important role to monitor and understand the drastic variations in the Earth's system as well as to advance the interdisciplinary studies of the interactions among multispheres within the system.

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“…The low S-velocities could be explained by the presence of unfrozen liquids as a result of premelting at grain joints. As a third study, synthetic seismograms were constructed so as to figure out a realistic regional structure model beneath Greenland [24]. Elastic wave propagation up to 2 Hz against different ice-sheet models was calculated by assuming various focal depths and seismic source mechanisms.…”

Section: Arctic Regionmentioning

confidence: 99%

Structural Studies on the Earth’s Crust, Plates, and the Ice Sheet in the Polar Region

Kanao¹

2018

Polar Seismology - Advances and Impact

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During the International Polar Year (IPY 2007-2008), a number of seismological studies regarding the structure and dynamics of the Earth's surface layers, the static inner structure of the crystalline crust and lithosphere involving Earth's history, earthquake occurrence mechanism, inner deformation of the plates, crustal movement relating to deglaciation, seismic isotropy, and the other topics of the ice sheet overlying the solid earth were conducted. In this chapter, recent seismological results as for the structural study of the crust, plates, and ice sheet in bipolar regions are overviewed.

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Numerical modeling of seismic waves for estimating the influence of the Greenland ice sheet on observed seismograms

Cited by 10 publications

References 20 publications

Cryoseismology

Cryoseismology

Summary: Global Seismology and the Polar Region

Structural Studies on the Earth’s Crust, Plates, and the Ice Sheet in the Polar Region

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