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Journal : Nekton

Preliminary modeling of tsunami potential in the Tanimbar Islands Ratuluhain, Eva Susan; Noya, Yunita Angnetjie; Kalay, Degen E.; Hukubun, Ronald Darlly
Nekton Vol 5 No 1 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i1.944

Abstract

The Tanimbar Islands are an area of high tectonic activity and are part of the outer arc island chain formed by subduction in the Banda zone. The presence of the Sorong Fault and Tanimbar Fault around the Tanimbar Islands also affects the level of vulnerability to earthquakes and tsunami hazards. The purpose of this study was to predict the tsunami potential and affected area of the Tanimbar Islands. The method of analyzing the height data and predicting the affected area used COMCOT v1.7 software. Model simulations were performed on the domain layer by using linear equations. Earthquake and fault parameter data were obtained from the USGS website using historical earthquakes dated January 10, 2023. Bathymetry data were obtained from the GEBO website at a resolution of 15-arcsecond (464 m). The model simulation results show that the initial wave height value marked by the red contour is 0.22 m and the lowest low tide value marked by the blue contour is -0.4 m. Based on these results, the tsunami potential in the Tanimbar Islands is not dangerous, as the potentially affected areas in the study area are Selu Island, Woluaru Island, Wotap Island, and Molu Island, as well as the small islands in the western part. The simulation results demonstrate the importance of research related to tsunami hazards that may occur in the future so that appropriate mitigation can be planned for the existence of small islands around the Tanimbar Islands.
Seasonal Variability of Wind, Surface Current and Sea Surface Temperature in the Eastern Seram Waters During the 2015 Super El Nino Utama, Cipta; Tubalawony, Simon; Waas, Harold Joppie Davido; Hukubun, Ronald Darlly; Wattimena, Marlin Chrisye
Nekton Vol 5 No 2 (2025): (Issue In Progress)
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i2.1062

Abstract

The eastern Seram waters are influenced by both the Seram Sea and the Banda Sea. This study aimed to examine variations in wind, surface currents, and sea surface temperature (SST) during 2015, coinciding with the super El Niño event. Data were obtained from the Group for High Resolution Sea Surface Temperature (GHRSST) and the Copernicus Marine Environment Monitoring Service (CMEMS). The results indicated that the monthly average wind speed in this area ranged from 0.01 to 8.98 m/s, with the lowest speed in November and the highest from January and June to September. Surface currents also exhibited seasonal variability, flowing from the Seram Sea to the Banda Sea during the west season (December–January) and reversing eastward in February. During the east season, Banda Sea water masses were supplied by Seram Sea water. Sea surface temperature decreased notably from June to August, with the lowest temperature recorded in August due to upwelling in the Banda and Arafura Seas. Surface currents formed eddies with warm water centers in the northern part of eastern Seram waters, and cold water centers (25,4 °C) were also observed. The convergence of these two water masses with distinct characteristics generated thermal fronts with temperature differences, resulting in strong temperature gradients from August to October as a consequence of upwelling and cooling induced by the intense El Niño at the end of 2015.
Rekonstruksi Tsunami Mentawai dengan Menggunakan COMCOT v1.7 Ratuluhain, Eva Susan; Noya, Yunita A.; Pradjoko, Eko; Rahman, Rahman; Hukubun, Ronald D.
Nekton Vol 2 No 2 (2022): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (793.853 KB) | DOI: 10.47767/nekton.v2i2.403

Abstract

Many studies on the Mentawai tsunami have been carried out. Still, not many have reviewed the validation of run-up height compared to the results of field studies in the same year as the Mentawai tsunami on October 25, 2010. The survey of the Mentawai tsunami reconstruction using COMCOT v1.7 aims to validate The tsunami run-up height of the model output was compared with the results of the field study by the GITST Team in 2010. Validation of the model was carried out using the Aida parameter, by calculating the ratio of the comparison between the model output and the field study results. The study location of the model is divided into 3 layers, namely layer01 covering Sipora Island, North Pagai Island, and South Pagai Island, layer02 covering North Pagai Island and South Pagai Island, and layer03 with the focus of observation on Sibigau Island, with bathymetric resolution used for each layer. 464 m, 232 m, and 77 m so that the propagation at the observation site can be seen clearly. The height of the modeled tsunami ranged from 2.5 – 11.2 meters, with a maximum run-up height observed on Sibigau Island of 11.2 meters, and the time range for the tsunami arriving on land was 5 – 15 minutes. The comparison ratio between the model results and the field study is K = 0.9 and k (standard deviation) = 0.16. Based on the comparison ratio, the model output is close to the actual result.
Co-Authors Abdi Pangestu Abdul Norman Kibas Adhe Fitri Rohly Elys Agnes A. Panggabean Aidah Z. N. Rohmah Albert F. Thomas Aldeva H. F Mawuntu Aldi Renata Alessandra F. Saija Alessandra F. Saija Alfian Fayus Shafar Ambo Alia U. Mahua Alif Nur Laili Rachmah Alvind G. Kambuno Amey Makahity Ami Indah Marasabessy Anansya Theresya Lekatompessy Anastasya Supusepa Aneila Stephanie Russel Angela Ruban Angela Ruban Aprilia Tuasuun Astry Tehuayo Atmisari Diman Audry Leiwakabessy Badaruddin, Sabrianah Bireinda Tirza Violetta Tuapattinaya Brian Saputra Manurung Charlota Masully Chrisnata Manihuruk Christiana Manuella Violynn Clifford R. Kundiman Degen E. Kalay Degen E. Kalay Degen Erasmus Kalay Delce Kainama Dhea Nurafni Firmansyah Donal Noija Eko Pradjoko Elsy Taruk Linggi Emilia Hanubun Esra Yudha Empra Eva Kaimudin Eva S. Ratuluhain Eva Susan Ratuluhain Evanthely N. Ch. M. Tahalele Fadila F F Farhana Umhaera Patty Fatima Kubais Febiyanty Palijama Feronika Pulamajen Fileo Agus Waileruny Fira A. Rehalat Friesland Tuapetel Frijona Fabiola Lokollo Fuadiska Salamena Gian Rumahlatu Gladys R. Pamesti Glaselaria A. Oeijano Gloria A. D. Rante Gloria M Souissa Gloria Sapulette Gloria Sitaniapessy Godwin W. A. Hehanussa Goziana Armagita Grace Pattiselanno Gratia D. Manuputty Gresia Maiseka Gresti Vionae Grisko V. Pattippeilohy Harold J.D. Waas Hehanussa, Kedswin Gerson Hektor Dalton Hehanussa Helmalya Putri Hendra Titawael Hendrikus Sakliressy Hensly Tahalea Hermanto Romera Hiariey, Johanis Hubert A. Mainake Hukubun, Wiwien Gaby Hulopi, Mahriyana Imanuel Villian Trayanta Soukotta Indra Wati Niapele Indriyanti Kendy Inri Chartini Johansz Intan Buton Ivanmorl Ruspanah Ivanmorl Ruspanah Ivanual M. Wairata Jembris Nustelu Joel Apriyanto Fejacreyo Huka Joel K. Cols Cols Johan B. Bension Johan Bruiyf Bension Jolanda Tomasouw Jorgi B. Kurniawan Josepina Inggriany Untailawan Joshua Amstrong Leuwol Jossep Titirloloby Josua Frans Trianto Joy Gaspersz Juan Marchel Paulus Jugerteria Luhulima Juliaans E. R. Marantika Jusuf Leiwakabessy Kalay, Degen E Kalay, Degen E. Karan Silaratubun Kelvin Sopahaluwakan Kereison D. Saija Kesia L. Sahusilawane Kezia Cornelia Klau Kezia Sovici Tuhuleruw Krisnawati Maahury Krisye Pasanea Kuntum N. Lisaholet Labibah Nur Dini Laura B. S. Huwae Laura Bianca Silvia Huwae Laura Bianca Sylvia Huwae LAURY CHARA HUWAE Lawalata, Felix Fernando Lenci Patty, Kristi Lina S. Berlianti Linansera, Valentine Lukman Hamsah Djari Lunmisay, Jelian Lusanra Jacqueline Tutkey M. Aldi Septian M. Fajar Alfikar Marcia Lainsamputty Marlin C. Wattimena Marlin Chrisye Wattimena Marsel Marthin Nikijuluw Masnia Masnia Masrikat, Julius A. N. Maya Lisa Haupea Megumi I. P. Malle Meilanny Cornelis Merlin Getdha Putnarubun Michele C. Manuputty Michele F. C. Usmany Michele Kesaulya Moniharapon, Louis D Murad Madi Mutia F. Tala N. Satumalay, Vilsigelint Natalia Tetelepta Novisty Mainake Noya, Yunita A. Noya, Yunita Angnetjie Nur Andini Pentury, Kresyan Poppy S Manila Pormes, Ludwina Pretty Mitra Kristina Zebua Prezto S. A. Dabutar Putri Azzuhra N. Pattisahusiwa Rahman Rahman Rahman Rahman Ratih C F Ratumanan Ratih C. F. Ratumanan Ratuluhain, Eva Susan Ratumanan , Ratih C F Refaldy Siahaya Regina Latuheru Retraubun, Alex S W Retraubun, Alex S. W Revi A. Rumbawa Rijoly, Frederik Rina S. D. Suganda Riski A. K. Rumata Riskiya Riskiya Ruben Mesasnuat Ruliana, Binti Rumasoreng Rumasoreng S. Tentua, Caroline Safitriyani Safitriyani Saleky, Valentine D Salma Rumau Sanduan, Fitria Sherly Lewerissa Shinta Syaranamual Siahainenia, Laura Silahooy, Veince B. Simon Tubalawony Siti R. Sehwaky Siti Rukmana Wally Siti S. Rumonin Sitti Aisa Mahu Sophia N. M. Fendjalang Sri J. A. Bandu Srihayu Umasangaji Stefanno M. A. Rijoly Stefano M. A. Rijoly Stela Salamor Suranti Pratiwi Suryani Makassar Syalvira N. Nasaruddin Tamaratritania Citta Trisnantari Tomasoa, Matheos Trisna Marsadi Tualeka, Oki Nurul Asma Utama, Cipta Valentine D. Saleky Valentine D. Saleky Velicia Ivena Hutubessy Vica Jillyan Edsti Saija Vicko Lamidja Vivin Ayuasthika Waas, Harold J.D Waas, Harold Joppie Davido Wakano, Deli Warnesy A Samangun Wattimena, Marlin Ch WATTIMURY, JUSUPH J Wenseslaus Rurum Yansen Jagatri Kufla Yayan Asmawan Yemima H. Von Bulow Yoisye Lopulalan Yulius Ruspanah Zusye Latuihamallo