Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2019-03-31 |
タイトル |
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タイトル |
Characteristics of non-tectonic tremors around the Lützow-Holm Bay, East Antarctica, during 2013–2015 |
タイトル |
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言語 |
en |
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タイトル |
Characteristics of non-tectonic tremors around the Lützow-Holm Bay, East Antarctica, during 2013–2015 |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Cryosphere |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Fast-sea-ice |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Harmonic tremor |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Microbaroms |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
MODIS |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Tanaka, Yuya
Hiramatsu, Yoshihiro
Ishihara, Yoshiaki
Kanao, Masaki
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Characteristics of non-tectonic tremors, excited mainly by the interaction within the cryosphere, were investigated using seismic waveform data of 2013–2015 recorded at broadband stations on the east coast of the Lützow-Holm Bay (LHB), East Antarctica. The tremors were classified into three types by spectral and waveform features. Type A events have long durations, typically several hours to days, with high amplitudes of spectra over 1–8 Hz. They occur dominantly in austral summers. Type B events have characteristically irregular variations in discrete dominant frequencies in spectra. Type C events are harmonic tremors with discrete dominant frequencies in spectra that vary regularly with time. Type B and C events show similar seasonal variations: they are numerous around April and less so in austral winter. Comparison of spectra between seismic waves and infrasound, together with satellite images, suggests that type A events originated from storm-induced swells near off-LHB. Source locations of type C events and satellite images suggest that type C events are likely to result from the collision/crevassing of ice blocks in fast-sea-ice in LHB. Similar seasonal variations of type B and C events imply that these two events have similar origins. |
書誌情報 |
en : Polar Science
巻 19,
p. 77-85,
発行日 2019-03
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2018.11.010 |
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関連名称 |
10.1016/j.polar.2018.11.010 |