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Penelitian ini mengkaji lebih dalam perbedaaan pola curah hujan di Sulawesi Utara. Penelitian menggunakan data 12 stasiun atau pos pengamatan curah hujan di Sulawesi Utara dengan menggunakan teknik Fast Fourier Transform (FFT). Tujuan penelitian ini adalah membuat peta distribusi spasial periodisitas spektral curah hujan di wilayah Sulawesi Utara, sehingga dapat dianalisis fenomena cuaca yang mempengaruhi curah hujan di beberapa wilayah di Sulawesi Utara. Hasil penelitian ini menunjukkan bahwa Sulawesi Utara diklasifikasikan menjadi 2 tipe periodisitas curah hujan yang memiliki kekuatan kerapatan spektral tertinggi dengan periode 36 dasarian dan periode 18 dasarian. Sulawesi Utara juga diklasifikasikan menjadi 5 tipe periodisitas curah hujan yang memiliki kekuatan kerapatan spektral tertinggi ke dua dengan periode 3-11 dasarian, periode 18 dasarian, periode 36 dasarian, periode 60-110 dasarian dan periode 359 dasarian.This research examines more deeply the differences in rainfall patterns in Northern Sulawesi. This research use the data from 12 stations or rainfall observation posts in North Sulawesi by using the technique of Fast Fourier Transform (FFT). The purpose of this research is to create a spatial distribution map of rainfall spectral periodicity in North Sulawesi in order to analyze weather phenomena that affect rainfall in some areas in North Sulawesi. Based on the results of this study, North Sulawesi is classified into 2 types of rainfall periodicity having the highest spectral density power with the period of 36 ten-days (dasarian) and the period of 18 ten-days. North Sulawesi is also classified into 5 types of rainfall periodicity having the second highest spectral density power with the period of 3-11 ten-days, the period of 18 ten-days, the period of 36 ten-days, the period of 60-110 ten-days and the period of 359 ten-days.

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This study investigated the effectiveness of the collaboration program between the Lecturer's Community Service (PKM) and Student's Community Service (KKN) of the State College of Meteorology Climatology and Geophysics (STMKG) for disaster-resilient in Pondok Aren District, South Tangerang, Indonesia. Community participatory methods have been applied during this program which elaborates the role of lecturers, students and the community in enhancing the disaster awareness community.  Some activities have been done during this program, such as providing the spatial information maps, designing the earthquake's evacuation route, planting the bio pure absorption hole technology (LRB), installing the Automatic Rain Gauge (ARG), counselling to school and Forum Group Discussion (FGD). As the result, Pondok Aren district appreciated STMKG, which has chosen their office as the target of program.  The improving knowledge about the disaster vulnerability in Pondok Aren district has formed during the program which the pre- and post-questioners of FGD can evaluate.  The collaboration-community service program proved more effective in activities, funding and time consumption than the conventional program. Furthermore, the causes of floods disaster in the Pondok Aren district also can be listed during this program.