EGU2020 11838.html Field Survey of the 2018 Anak KrakatauFritz … · 2020. 5. 6. · • Tsunami...
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Field Survey of the 2018 Anak Krakatau Tsunami on the Islands in the Sunda Strait Hermann M. Fritz 1 , Tubagus Solihuddin 2 , Costas E. Synolakis 3,4 , Gegar S. Prasetya 5 , Jose C. Borrero 6 , Vassilis Skanavis 3 , Semeidi Husrin 2 , Widjo Kongko 7 , Dinar C. Istiyanto 7 , August Daulat 2 , Dini Purbani 2 , Hadiwijaya L. Salim 2 , Rahman Hidayat 2 , Velly Asvaliantina 2 , Maria Usman 5 , Ardito Kodijat 9 1 https://meetingorganizer.copernicus.org/EGU2020/EGU2020‐11838.html 1 School of Civil and Environmental Eng., Georgia Institute of Technology, Atlanta, GA 30332, USA 2 Marine Research Centre, Ministry of Marine Affairs and Fisheries, Jakarta 14430, Indonesia 3 Dept. of Civil and Env. Eng., University of Southern California, Los Angeles, CA 90089, USA 4 Dep. of Environmental Engineering, Technical University of Crete, Chanea 73100, Greece 5 Indonesian Tsunami Scientific Community, Jakarta 12950, Indonesia 6 eCoast Ltd., 47 Cliff St., Raglan 3225, New Zealand 7 Agency for the Assessment and Application of Technology (BPPT), Yogyakarta 55284, Indonesia 8 Coordinating Ministry for Maritime Affairs – Jakarta 10340, Indonesia 9 IOC‐UNESCO, Indian Ocean Tsunami Information Center (IOTIC), Jakarta 12110, Indonesia Fritz et al., 2020
Transcript of EGU2020 11838.html Field Survey of the 2018 Anak KrakatauFritz … · 2020. 5. 6. · • Tsunami...
Field Survey of the 2018 Anak Krakatau Tsunami on the Islands in the Sunda StraitHermann M. Fritz1, Tubagus Solihuddin2, Costas E. Synolakis3,4,Gegar S. Prasetya5, Jose C. Borrero6, Vassilis Skanavis3, Semeidi Husrin2, Widjo Kongko7, Dinar C. Istiyanto7, August Daulat2,
Dini Purbani2, Hadiwijaya L. Salim2, Rahman Hidayat2,Velly Asvaliantina2, Maria Usman5, Ardito Kodijat9
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https://meetingorganizer.copernicus.org/EGU2020/EGU2020‐11838.html
1 School of Civil and Environmental Eng., Georgia Institute of Technology, Atlanta, GA 30332, USA 2 Marine Research Centre, Ministry of Marine Affairs and Fisheries, Jakarta 14430, Indonesia3 Dept. of Civil and Env. Eng., University of Southern California, Los Angeles, CA 90089, USA4 Dep. of Environmental Engineering, Technical University of Crete, Chanea 73100, Greece 5 Indonesian Tsunami Scientific Community, Jakarta 12950, Indonesia6 eCoast Ltd., 47 Cliff St., Raglan 3225, New Zealand7 Agency for the Assessment and Application of Technology (BPPT), Yogyakarta 55284, Indonesia8 Coordinating Ministry for Maritime Affairs – Jakarta 10340, Indonesia9 IOC‐UNESCO, Indian Ocean Tsunami Information Center (IOTIC), Jakarta 12110, Indonesia
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Volcanic Tsunamis:Krakatau 1883 and 2018
Anak Krakatau Before(Photo: September 2018)
Krakatau 1883 remnant Rakata
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Volcanic Tsunamis – Krakatau 1883Anak Krakatau Before (Photos: September 2018)
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Meeting at Marine Research Center (MRC):Ministry of Marine Affairs and Fisheries (MoMAF) and Coordinating Ministry of Maritime Affairs (CMoMA)
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TIDE STATION POINTS
# Lon. (deg) Lat. (deg.) Sta. Name
1 105.8410 ‐6.1893 Serang2 105.9530 ‐6.0176 Ciwandan3 104.2130 ‐5.5204 Bangkunat4 104.6190 ‐5.5003 Kota Agung5 105.3190 ‐5.4713 Panjang
G.A.K
Slide:Widjo Kongko
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Water
Elevat
ion (m
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Time (UTC+7:00 / WIB)
Ciwandan(105.953E, 6.0176S)
MARIGRAM: CiwandanG.A.K
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:00Water Elevation (m
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Time (UTC+7:00 / WIB)
Ciwandan(105.953E, 6.0176S)
Slide:Widjo Kongko
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Sunda Strait Islands Tsunami Field Survey
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RakataIsland
Maximum85 m runup
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Rakata Island
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Krakatau Volcanic Complex
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Panjang Island
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Panjang Island
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Panjang Island
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Anak Krakatau Volcano
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Anak Krakatau Volcano
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Sertung Island
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Anak Krakatau
Rakata
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Sertung Island
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Sertung Island
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Sertung Island
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Sertung Island
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Sebesi
NearestInhabitedIsland
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Sebesi Island
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Sebesi Island
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Sebesi Island
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Sebesi Island
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Waymuli, Sumatra
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Waymuli, Sumatra
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Panaitan Island, Ujung Kulon National Park
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Panaitan Island, Ujung Kulon National Park
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Panaitan Island, Ujung Kulon National Park
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Panaitan Island, Ujung Kulon National Park
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Ujung Kulon National Park
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Ujung Kulon National Park
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Ujung Kulon National Park
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Ujung Kulon National Park
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Eyewitness Interview
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Sunda Strait Islands Tsunami Field Survey
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2018 Sunda Strait tsunami CONCLUSIONS• ITST collected 87 tsunami heights February 4‐9, 2019• Maximum 85 m runup on Rakata and an 83 m runup on Sertung.• Flow depth reached more than 11 m above ground on Sertung. • On Sebesi Island located 15 km northeast of the source tsunami runup
heights remained below 10 m.• Tsunami heights exceeding 10 m were observed in the Ujung Kulon
National Park located 50 km southwest. • The runup distributions on the islands encircling Anak Krakatau
highlight the directivity of the collapse towards the southwest. • Inundation and damage were mostly limited to within 400 m of the
shoreline given the relatively short wavelengths of volcanic tsunamis.• The team interviewed numerous eyewitnesses based on established
protocol and educated residents about tsunami hazards. • Community‐based education and awareness programs are essential to
save lives in locales at risk from locally generated tsunamis. • Regrowth of Anak Krakatau will determine the future tsunami hazard • PAGEOPH Borrero et al., 2020 tentatively accepted for publication
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Acknowledgments
This work is supported by • National Science Foundation NSF RAPID award CMMI‐1906162
• Any opinions, findings, and conclusions or recommendations expressed herein are those of the author(s) and do not necessarily reflect the views of the National Science Foundation
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Terima Kasih ‐ QuestionsFritz et al., 2020
