Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone
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- Material Type
- 記事
- Author/Editor
- Yutaro OkadaTakuya NishimuraTakao Tabei
- Publication, Distribution, etc.
- Publication Date
- 2022-01-24
- Publication Date (W3CDTF)
- 2022-01-24
- Periodical title
- EPS : Earth, Planets and Space
- No. or year of volume/issue
- 74(18)
- Volume
- 74(18)
- ISSN (Periodical Title)
- 1880-5981
- ISSN-L (Periodical Title)
- 1343-8832
- Text Language Code
- eng
- DOI
- 10.1186/s40623-022-01576-8
- Persistent ID (NDL)
- info:ndljp/pid/12287086
- Collection
- Collection (Materials For Handicapped People:1)
- Collection (particular)
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- Acquisition Basis
- オンライン資料収集制度
- Date Accepted (W3CDTF)
- 2022-05-18T20:14:28+09:00
- Date Captured (W3CDTF)
- 2022-04-27
- Format (IMT)
- application/pdf
- Access Restrictions
- 国立国会図書館内限定公開
- Service for the Digitized Contents Transmission Service
- 図書館・個人送信対象外
- Availability of remote photoduplication service
- 可
- Periodical Title (URI)
- Periodical Title (Persistent ID (NDL))
- info:ndljp/pid/12287068
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- Summary, etc.
- Using global navigation satellite system (GNSS) data to detect millimeter-order signals of short-term slow slip events (S-SSEs) and to estimate their source parameters, especially duration, is challenging because of low signal-to-noise ratio. Although the duration of S-SSEs in the Nankai subduction zone has been estimated using tiltmeters, its regional variation has never been quantitatively studied. We developed an S-SSE detection method to estimate both the fault model and duration with their errors based on the detection methods developed by previous studies and applied it to a 23-year period of GNSS data in the Nankai subduction zone. We extracted S-SSE signals by calculating correlation coefficients between the GNSS time series and a synthetic template representing the time evolution of an S-SSE and by computing the average of correlation coefficients weighted by the predicted S-SSE signals. We enhanced the signals for duration estimation by stacking GNSS time series weighted by displacements calculated from the estimated fault model. By applying the developed method, we detected 284 S-SSEs from 1997 to 2020 in the Nankai subduction zone from Tokai to Kyushu and discussed their regional characteristics. The results include some newly detected S-SSEs, including events accompanying very low-frequency earthquakes and repeating earthquakes in offshore Kyushu. Our study provides the first geodetic evidence for synchronization of S-SSEs and other seismic phenomena in offshore Kyushu. We estimated the cumulative slip and duration, and their error carefully. We also estimated the average slip rate by dividing the cumulative slip by the cumulative duration. This study clarified that the average slip rate in western Shikoku was approximately twice as that in eastern Shikoku and Kyushu. These regional differences were statistically significant at the 95% confidence interval. Multiple factors can influence the regional characteristics of S-SSEs, and we speculate that the subducting plate interface geometry is one of the dominant factors.
- DOI
- 10.1186/s40623-022-01576-8
- Access Restrictions
- インターネット公開
- Rights (production)
- © The Author(s) 2022.This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Related Material
- Additional file 4 of Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zoneAdditional file 3 of Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zoneAdditional file 1 of Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zoneAdditional file 2 of Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone
- Related Material (URI)
- Is Referenced By
- A review on slow earthquakes in the Japan TrenchSystematic Detection of Short‐Term Slow Slip Events in Southcentral AlaskaDevelopment of an epidemic-type aftershock-sequence model explicitly incorporating the seismicity-triggering effects of slow slip eventsAlong-strike distribution of seismicity and large slow slip correlated with gravity at the Nankai TroughLong-term slow slip events with and without tremor activation in the Bungo Channel and Hyuganada, southwest JapanDeep plutonic bodies over low-frequency earthquakes revealed from receiver-side Green's functionsEight-year catalog of deep short-term slow slip events at the Nankai trough based on objective detection algorithm using strain and tilt recordsInvestigation on short-term slow slip events in the northeast Japan subduction zones using decadal GNSS dataSpatiotemporal evolution of a deep short-term slow slip event in the Nankai subduction zone in November 2022 derived from strain, tilt, and GNSS recordsNumerical experiment toward simultaneous estimation of the spatiotemporal evolution of interseismic fault slips and block motions in southwest JapanDetection and Characterization of Earthquake Swarms in Nankai and Its Association With Slow Slip EventsReduction of non-tidal oceanographic fluctuations in ocean-bottom pressure records of DONET using principal component analysis to enhance transient tectonic detectabilityA review of shallow slow earthquakes along the Nankai TroughReduction of non-tidal oceanographic fluctuations in ocean bottom pressure records of DONET using principal component analysis to enhance tectonic transient detectabilityRecent advances in earthquake seismology using machine learningThick slab crust with rough basement weakens interplate coupling in the western Nankai Trough南海トラフ沿いで発生する浅部スロー地震の特徴日向灘南部における大地震の多様な発生様式南海トラフにおける浅部スロー地震域の地質構造と摩擦特性
- References
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- References (URI)
- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- 学術機関リポジトリデータベース雑誌記事索引データベースCrossref科学研究費助成事業データベース科学研究費助成事業データベース科学研究費助成事業データベースCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossref
- Bibliographic ID (NDL)
- 12287086