Munir, Cindy Ulul Azmi (2026) Analisis Komparatif Global Energi Spektral Tsunami dan Interaksi Fase Pasut Menggunakan Data Tide gauge Resolusi Temporal Tinggi. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tsunami merupakan fenomena oseanografi ekstrem yang dipicu oleh gangguan geodinamik, seperti gempa megathrust, longsoran bawah laut, dan aktivitas vulkanik. Analisis komparatif multi-event yang mengintegrasikan karakteristik spektral, kuantifikasi energi, dan interaksi fase pasut masih relatif terbatas. Penelitian ini bertujuan menganalisis karakteristik spektral, energi, dan pengaruh fase pasut terhadap tsunami menggunakan data tide gauge resolusi temporal tinggi pada empat peristiwa besar, yaitu Chile (2010), Mentawai (2010), Tohoku (2011), dan Kamchatka–Rusia (2025). Metode penelitian meliputi pre-processing, harmonic analysis, analisis spektral menggunakan Fast Fourier Transform (FFT) dan Continuous Wavelet Transform (CWT), kuantifikasi energi melalui integral kuadrat residual, uji Mann–Whitney untuk mengevaluasi pengaruh fase pasut terhadap amplitudo dan energi, serta analisis korelasi Pearson dan Spearman untuk mengidentifikasi pola global lintas kejadian. Hasil penelitian menunjukkan bahwa setiap peristiwa memiliki spectral fingerprint yang berbeda, dengan periode dominan meningkat seiring bertambahnya magnitudo sumber (36,0–78,3 menit). Hubungan amplitudo dan energi menunjukkan korelasi yang sangat kuat (r = 0,928; p < 0,001), sedangkan fase pasut tidak memberikan pengaruh yang signifikan terhadap amplitudo maupun energi (p > 0,05). Penelitian ini berkontribusi terhadap pencapaian SDG 1 melalui penguatan ketahanan masyarakat pesisir, SDG 9 melalui pengembangan sistem peringatan dini tsunami, SDG 14 melalui peningkatan pemahaman ekosistem laut dan pesisir, serta SDG 17 melalui kolaborasi internasional berbasis jaringan tide gauge.
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Tsunamis are extreme oceanographic phenomena triggered by major geodynamic disturbances, including megathrust earthquakes, submarine landslides, and volcanic activity. Comparative multi-event studies integrating spectral characteristics, energy quantification, and tidal phase interaction remain relatively limited. This study aims to analyze the spectral characteristics, energy, and influence of tidal phase on tsunami behavior using high-temporal-resolution tide gauge records from four major events: Chile (2010), Mentawai (2010), Tohoku (2011), and Kamchatka–Russia (2025). The methodology includes pre-processing, harmonic analysis, spectral analysis using the Fast Fourier Transform (FFT) and Continuous Wavelet Transform (CWT), energy quantification through the squared residual integral, the Mann–Whitney test to evaluate the influence of tidal phase on tsunami amplitude and energy, and Pearson and Spearman correlation analyses to identify global patterns across events. The results indicate that each event exhibits a distinct spectral fingerprint, with dominant periods increasing with earthquake magnitude (36.0–78.3 min). A very strong correlation was observed between tsunami amplitude and energy (r = 0.928, p < 0.001), whereas tidal phase showed no significant influence on either amplitude or energy (p > 0.05). This study contributes to SDG 1 by strengthening coastal community resilience, SDG 9 through the advancement of tsunami early warning systems, SDG 14 by improving understanding of marine and coastal ecosystems, and SDG 17 through international collaboration based on tide gauge networks.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Amplitudo; Energi; Fase Pasut; SDGs; Spektral; Tsunami |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GC Oceanography > GC89 Sea Level T Technology > TC Hydraulic engineering. Ocean engineering > TC424 Water levels T Technology > TD Environmental technology. Sanitary engineering > TD171.75 Climate change mitigation T Technology > TD Environmental technology. Sanitary engineering > TD890 Global Environmental Monitoring System |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Geomatics Engineering > 29101-(S2) Master Theses |
| Depositing User: | Cindy Ulul Azmi Munir |
| Date Deposited: | 30 Jul 2026 06:52 |
| Last Modified: | 30 Jul 2026 06:52 |
| URI: | http://repository.its.ac.id/id/eprint/139733 |
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