Claim Missing Document
Check
Articles

Found 2 Documents
Search

Analisis Intensitas Radiasi Matahari di Manado dan Maros Rifai, Listya Dewi; Tongkukut, Seni H. J.; Raharjo, Slamet Suyitno
Jurnal MIPA Vol 3, No 1 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.3.1.2014.3907

Abstract

Telah dilakukan analisis intensitas radiasi matahari di Manado dan Maros dengan menganalisis pola grafik intensitas radiasi matahari terhadap sudut deklinasi matahari. Faktor pengaruh atmosfer dianalisis dari pola intensitas radiasi matahari terhadap curah hujan dengan metode regresi linear sederhana pada kedua daerah penelitian. Hasil yang diperoleh berupa nilai intensitas radiasi matahari di Maros lebih tinggi dibandingkan Manado sepanjang tahun, dengan Maros 133.121 gram.cal/cm², dan Manado 117.289 gram.cal/cm². Penerimaan intensitas radiasi matahari di Manado dan Maros dipengaruhi oleh intensitas curah hujan di kedua daerah, yaitu kenaikan curah hujan menurunkan intensitas radiasi matahari, disamping dipengaruhi oleh kondisi geografi lokal dan faktor tutupan awan.An analysis of solar radiation intensity in Manado and Maros had been performed by analyzing the chart pattern of the solar radiation intensity against angle of solar declination. The effect of atmosphere was analyzed using a simple linear regression method from the solar radiation intensity pattern against the precipitation at the two areas. The results showed that the solar radiation intensity value ​​in Maros was higher than that in Manado throughout the year, which were 133.121 gram.cal/cm² in Maros and 117.289 gram.cal/cm² in Manado. The solar radiation intensity in Manado and Maros was influenced by precipitation intensity in both regions, that was the increasing precipitation intensity decreased the solar radiation intensity, and by local geography and cloud factor.
IDENTIFICATION OF LOCAL ACTIVE FAULTS IN MAINLAND GORONTALO REGION BASED ON FOCAL MECHANISM ANALYSIS Pertiwi, Imanuela Indah; Rifai, Listya Dewi
Jurnal Geosaintek Vol. 10 No. 3 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v10i3.2217

Abstract

One of the nations that experiences devastating earthquakes frequently is Indonesia. Local active faults on land are one of the causes of these earthquakes. New information on the purported presence of local active faults can be obtained from the quantity of small-magnitude earthquake occurrences. By analyzing the focal sphere mechanism, small-scale earthquake data are used to identify local active faults in the Gorontalo area. The minor magnitude earthquakes (M<5) that struck the Gorontalo region in February 2023 and were recorded eleven events at the BMKG- Gorontalo Geophysical Station that were used in this investigation. he resulting focus sphere diagram can be used to ascertain the faults or strike direction propensity. The focal mechanism of the earthquake in the Pohuwato region demonstrates the Oblique Thrust Fault's inclination toward a northeastern-southern strike orientation. The tendency of the strike orientation of the east-west-oriented Oblique Thrust Fault, which is the focal mechanism of the earthquake that happened in Buol, also demonstrates the same thing. According to the Gorontalo Fault diagram provided by the National Earthquake Study Center, the focal mechanism of the earthquake in Cluster A (earthquake numbers 1,6,9), the Gorontalo region, also demonstrates the strike direction of the Northwest-Southeast-oriented Oblique Thrust Fault. The earthquake occurrences in cluster B (Pohuwato area), earthquake numbers 2,3,8, and cluster C (Buol area), earthquake numbers 4, 5,7, raise the possibility of a new local active fault on the Gorontalo region's mainland. The Gorontalo region's suspicion of the existence of local active faults is strengthened by the monitoring of earthquake intensity based on occurrences that occurred between March 2023 and March 2024. Over the course of a year, there are nine to twenty-seven earthquakes with a magnitude of less than five (M<5). These seismic occurrences provide credence to the theory that Pohuwato and Buol, Gorontalo, have local active faults.