?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+ANOMALI+SINYAL+ULTRA+LOW+FREQUENCY%0D%0ABERDASARKAN+DATA+PENGUKURAN+GEOMAGNETIK%0D%0ASEBAGAI+INDIKATOR+PREKURSOR+GEMPABUMI%0D%0AWILAYAH+LAMPUNG+TAHUN+2016&rft.creator=ULFA+WAHYUNINGSIH%2C++1315051056&rft.subject=GB+Physical+geography&rft.subject=Rekayasa+hidrolik+.+rekayasa+laut&rft.description=Telah+dilakukan+penelitian+tentang+analisis+anomali+sinyal+pada+spektrum%0D%0Afrekuensi+yang+sangat+rendah+berdasarkan+data+pengukuran+geomagnetik+sebagai%0D%0Aindikator+prekursor+gempabumi+wilayah+Lampung+tahun+2016.+Untuk+mencapai%0D%0Atujuan+penelitian+dilakukan+berdasarkan+tahapan+berikut+ini+(i)+Perhitungan+data%0D%0Amedan+magnet+total%3B+(ii)+Analisis+Tren+Harian%3B+(iii)+Transformasi+Fourier+data%0D%0AAnomali+Geomagnetik%3B+(iv)+Lokalisasi+Frekuensi+ULF+%3B+(v)+Perhitungan+Ratio%0D%0AVertikal-Horizontal+(Polarisasi+Ratio+Z%2FH)+%3B+(vi)+Koreksi+badai+magnet+atau%0D%0ADisturbance+Strom+Time+(DST)%3B+(vii)+Identifikasi+Prekursor+gempabumi%3B+(viii)%0D%0APenentuan+Onset+Time%2C+lead+time%2C+dan+arah+prekursor.+Hasil+analisis+sepuluh%0D%0Agempabumi+dengan+magnitudo+diatas+5+Mw+memiliki+prekursor+antara+11+sampai%0D%0A30+hari+sebelum+terjadi+gempabumi.+Sembilan+dari+sepuluh+gempabumi+yang%0D%0Aditeliti+memiliki+prekursor+dan+satu+gempabumi+yang+tidak+memiliki+prekursor%2C%0D%0Ahal+ini+dikarenakan+jaraknya+yang+terlalu+jauh+dari+stasiun+MAGDAS+di+Liwa%2C%0D%0ALampung+Barat.+Dengan+demikian+dapat+diketahui+bahwa+prekursor+menggunakan%0D%0Adata+magnetik+tersebut+dapat+digunakan+untuk+melakukan+prediksi+jangka+pendek.%0D%0AKata+Kunci+%3A+Gempabumi+Wilayah+Lampung%2C+emisi+ULF%2C+Prekursor+gempabumi.%0D%0A%0D%0AABSTARCT%0D%0A%0D%0ARegional+research+had+been+done+to+analysis+anomalies+signal+of+ultra+low%0D%0Afrequency+based+on+measurement+data+as+an+indicator+of+the+geomagnetic%0D%0Aearthquake+precursor+of+lampung+in+2016.+To+achieve+purpose+of+the+study%0D%0Aconducted+by+the+following+steps%3A+(i)+Calculation+of+the+total+magnetic+field+of+data%3B%0D%0A(ii)+Daily+Trend+Analysis%3B+(iii)+the+Fourier+transform+of+the+data+Geomagnetic%0D%0AAnomaly%3B+(iv)+Localization+Frequency+ULF%3B+(v)+Calculation+of+Ratio+Vertical-%0D%0AHorizontal+(Polarization+Ratio+Z+%2F+H)%3B+(vi)+Correction+magnetic+storms+or%0D%0ADisturbance+Strom+Time+(DST)%3B+(vii)+the+identification+of+earthquake+precursors%3B%0D%0A(viii)+Determination+of+OnsetTime%2C+leadtime%2Cand+the+direction+of+precursors.+The%0D%0Aresults+of+the+analysis+of+ten+earthquakes+with+a+magnitude+above+5+MW+have%0D%0Aprecursors+between+11+to+30+days+before+an+earthquake.+Nine+out+of+ten+earthquakes%0D%0Astudied+had+an+earthquake+precursors+and+precursors+that+do+not+have%2C+this+is+because%0D%0Athe+distance+is+too+far+from+the+station+Magdas+in+Liwa%2C+West+Lampung.+Thus+it+can%0D%0Abe+seen+that+the+precursor+using+the+magnetic+data+can+be+used+to+make+short-term%0D%0Apredictions.%0D%0AKeywords%3A+Earthquake+Lampung+region%2C+ULF+emissions%2C+precursors+of%0D%0Aearthquakes.&rft.publisher=Fakultas+Teknik&rft.date=2017-08-21&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28322%2F1%2FABSTRACT%2520%2528ABSTRAK%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28322%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28322%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++ULFA+WAHYUNINGSIH%2C+1315051056++(2017)+ANALISIS+ANOMALI+SINYAL+ULTRA+LOW+FREQUENCY+BERDASARKAN+DATA+PENGUKURAN+GEOMAGNETIK+SEBAGAI+INDIKATOR+PREKURSOR+GEMPABUMI+WILAYAH+LAMPUNG+TAHUN+2016.++Fakultas+Teknik%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F28322%2F