The December 2018 Anak Krakatau Volcano Tsunami as Inferred from Post-Tsunami Field Surveys and Spectral Analysis

Abdul Muhari, Mohammad Heidarzadeh, Harjo Susmoro, Haris D. Nugroho, Estu Kriswati, Supartoyo, Antonius B. Wijanarto, Fumihiko Imamura, Taro Arikawa

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69 Citations (SciVal)

Abstract

We present analysis of the December 2018 Anak Krakatau tsunami in Sunda Strait, Indonesia, from a combination of post-tsunami field surveys, bathymetric changes and spectral analysis of the tsunami tide gauge records. Post-tsunami surveys revealed moderate tsunami height along the coast of Sumatra and Java with maximum surveyed runup of 13.5 m and maximum inundation distance of 330 m. At small islands located close to the volcano, extreme tsunami impacts were observed indicating not only a huge tsunami was generated by large amounts of collapse material which caused notable changes of seafloor bathymetry, but also indicates the role of those small islands in reducing tsunami height that propagated to the mainland of Indonesia. Our spectral analysis of tide gauge records showed that the tsunami’s dominant period was 6.6–7.4 min, indicating the short-period nature of the 2018 Sunda Strait tsunami.

Original languageEnglish
Pages (from-to)5219-5233
Number of pages15
JournalPure and Applied Geophysics
Volume176
Issue number12
DOIs
Publication statusPublished - 1 Dec 2019

Bibliographical note

Funding Information:
Authors are grateful to the Minister of Marine Affairs and Fisheries, Susi Pudjiastuti and Director General of Marine Spatial Management, Brahmantya Satyamurti Poerwadi for their supports from the early stages of the study. The authors also thank the Chairwoman of National Agency of Meteorology, Climatology and Geophysics of Indonesia, Prof. Dwikorita Karnawati for involving AM in the airborne survey. This research is partially funded by International Research Institute of Disaster Science, Tohoku University, Japan. Survey team member from Ministry of Marine Affairs and Fisheries; Bobby Arianto, Oktanul Dinata. Survey team from Geological Agency of Indonesia is acknowledged. MH is funded by the Royal Society (grant number CHLR1180173) and the Brunel University London (Brunel Research Initiative and Enterprise Fund 2017/18, BUL BRIEF).

Funding Information:
Authors are grateful to the Minister of Marine Affairs and Fisheries, Susi Pudjiastuti and Director General of Marine Spatial Management, Brahmantya Satyamurti Poerwadi for their supports from the early stages of the study. The authors also thank the Chairwoman of National Agency of Meteorology, Climatology and Geophysics of Indonesia, Prof. Dwikorita Karnawati for involving AM in the airborne survey. This research is partially funded by International Research Institute of Disaster Science, Tohoku University, Japan. Survey team member from Ministry of Marine Affairs and Fisheries; Bobby Arianto, Oktanul Dinata. Survey team from Geological Agency of Indonesia is acknowledged. MH is funded by the Royal Society (grant number CHL\R1\180173) and the Brunel University London (Brunel Research Initiative and Enterprise Fund 2017/18, BUL BRIEF).

Publisher Copyright:
© 2019, The Author(s).

Keywords

  • anak Krakatau Volcano
  • post-tsunami survey
  • Sunda strait tsunami

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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