Hasil Pencarian  ::  Simpan CSV :: Kembali

"Periodic magnetic storms are those related to reccurent coronal hole events within a period of one solar rotation. There are still few studies on successive periodic magnetic storm. In this paper, we discuss the nature of the amplitude of the periodic magnetic storms within the solar cycle 20,21,22, and 23. The periodic nature of solar wind ( 27 days) occured on descending phase of solar cycle 22 also caused a reccurent geomagnetic disturbance. The disturbance developed into a geomagnetic storm in the first (27 days) and the ninth rotation. The geomegnetic disturbances with period 27 and 13.5 days are both significant at the low latitude while the period of 30 days are more dominant at the high latitude. That mean, from two flows of high velicity plasmas, only one that higher contribution on the occurence of geomagnetic disturbance accompanied by high intensity southern Bz field."

"hanges in the daily variation of H component due to magnetic storms with a duration of hours to days is the space weather information is very important for further decision making for the user. Activity disturbance caused wave/influx of energetic particles that arise through the solar wind, can solve the earth's magnetic field is strong at very short intervals. Changes in the daily variation H component is generally an increase or decrease up to hundreds of nano tesla from a stable ondition. In the paper be discussion analysis of changes in the daily variation of H component magnet during magnetic storms using double Fourier series. In order to obtain information from changes daily variation of H component during magnetic storms through data from monitoring stations geomagnetic Biak and Tangerang. The results of analysis obtained 3 times a magnetic storm events occur fluctuation SSG to daily variations in H component in Tangerang April 2001, in order 171nT,-and-125nT 221nT. Magnetic storm SSC 28 April 2001 showed changes occur daily variation of H component in the station at Biak -467nT and 1124nT."

"The ease on development of micro-satellites using relativity simplified facilities and with relatively less costs have provided the opportunity on development of experimental micro-satellites to provide earth observation information to support development efforts in Indonesia. A functional analysis assessment is implemented to the integrated operational activity of the ground station regarding remote sensing data acquisition and satellite control operation according to user data request. The description of ground station telemetry and command operational functions consist of several coordinated aspects of satellite in-orbit maintenance, operation of satellite payload, and scheduling of satellite data acquisitions."

"Telah dikaji indikasi perubahan iklim, khususnya variasi atau perubahan curah hujan bulanan yang terjadi di Kabupaten Subang dan Tasikmalaya. Berbasis kepada data curah hujan bulanan yang dihasilkan oleh Badan Meteorologi dan Geofisika (BMG) selama 25 tahun pengamatan (1980-2005), di atas wilayah tersebut dibuatlah kelompok Zona Prediksi Iklim (ZPI) sesuai kriteria menurut BMG. Hasilnya menunjukkan bahwa hampir semua ZPI mengalami tren positif. Walaupun didapat pola Monsunal dengan siklus utama sekitar 12 bulanan, namun terdapat perbedaan jumlah curah hujan ratarata antara Kabupaten Subang dan Tasikmalaya. Pada semua wilayah terdapat perbedaan intensitas curah hujan dalam tiap bulan, terutama selama musim hujan (November-April). Wilayah Subang ZPI 40 dan ZPI 46 mempunyai curah hujan antara 300 hingga 450 mm pada saat musim hujan. Sementara ZPI 33, ZPI 41 dan ZPI 42 mempunyai curah hujan antara 150 hingga 300 mm. Sedangkan wilayah Tasikmalaya, umumnya memiliki curah hujan antara 200-400 mm pada semua wilayah ZPI."

"Geomagnetic disturbances are closely related with the interplanetary magnetic field, particularly the southward component (negative Bz), since such condition can lead to the energy tranfer from the solar wind into the Earth’s magnetosphere. The energy transfer can cause disturbance in geomagnetic field, which is represented by disturbance index Dst. The good correlation between the minimum values of Bz and Dst means that the stronger the magnetic field can lead to the stronger disturbance. However, the minimum of both parameter do not occur simultaneously. From analysis of 41 geomagnetic storms with Dst ≤ -30 nT, in general, the time delay between Bz and Dst is two hours, which Bz reach minimum two hour before the Dst. It represent the time that required by the disturbance to travel from magnetopause to the Earth. Keywords: Geomagnetic disturbance, Interplanetary magnetic field"

"Penelitian ini membahas tentang sebaran gempa bumi merusak yang pernah terjadi di Provinsi Bengkulu dan Kabupaten Lampung Barat dari tahun 1900 hingga 2010 Sebaran dalam hal ini dilihat dalam sebaran daerah terdampak gempa bumi berupa intensitas kerusakan serta nilai Peak Ground Acceleration PGA pada setiap kejadian gempa bumi merusak yang terjadi Setelah itu akan dilihat pengaruh karakteristik wilayah seperti kelompok batuan jarak terhadap patahan dan lereng terhadap tingkat kerusakan di daerah terdampak gempa bumi merusak Gempa bumi merusak yang terjadi dari tahun 1900 hingga 2010 sebanyak 11 kali kejadian dan berasal dari pergerakan sesar aktif dimana sebagian besar berada pada wilayah pesisir sedangkan di Kabupaten Lampung Barat berada pada wilayah pegunungan yang dekat dengan Sesar Semangko dengan nilai PGA dominan 75 139 gals dan intensitas dominan antara VIII dan IX MMI yang didominasi pada kelompok batuan sedimen berada pada jarak 500 1000 m pada patahan dan kondisi lereng 2 15 dimana Terdapat kecenderungan tingkat kerusakan yang lebih besar pada daerah terdampak yang terdapat patahan patahan lokal di sekitarnya dan kondisi lereng yang berkisar antar 15 hingga 40 dimana potensi longsor sangat mungkin terjadi dan menambah tingkat kerusakan akibat bencana gempa bumi walaupun berada pada wilayah nilai PGA yang lebih tinggi.

---

This study discusses the distribution of destructive earthquakes that had been occurred in the provinces of Bengkulu and West Lampung regency from 1900 to 2010 Distribution in this case be seen in the distribution of earthquake affected areas such as the intensity of the damage and the value of Peak Ground Acceleration PGA at any damaging earthquakes that occurred After that will be the influence of regional characteristics such as rock group the distance to the fault and the slope of the extent of damage in the area affected by the destructive earthquake Damaging earthquakes that occurred from 1900 to 2010 as many as 11 times the incidence and comes from the movement of active faults which are mostly located in coastal areas while in the West Lampung regency located in the mountainous region near the Semangko fault with PGA values dominant are 75 139 gals and dominant intensity between MMI VIII and IX on the group of sedimentary rocks located at a distance of 500 1000 m from faults and slope conditions in which 2 15 which is likely that a greater level of damage in the affected areas contained fragments surrounding local and conditions of the slopes that range between 15 to 40 where the potential landslide is likely to occur and increase the level of damage caused by the earthquake in the region even located on higher PGA values English version of the abstract can be written here"

"(software) of the IR1 (Infrared) and the calibration (CAL), it can be known when the dry season start based on the cloud top temperature and the cloud coverage of Indonesia. The results of the monthly MTSAT data in two years observations (period 2006 to 2007), shows that the dry season beginning of Indonesia is in June, July, August, September and October started from the eastern part of Indonesia to the western part of Indonesia especially the South Sumatera. Further by using Standard Presipitation Index (SPI) methods in June, July, August, September and October 2007 (five months), gives some information that the most experiencing drought areas in Indonesia especially in the eastern part of Indonesia are July and August. Keyword:Rainfall, MTSAT, drought "

"Hydrometeor is a phenomenon in the atmosphere which consist of particles of liquid and solid water in the atmosphere, or deposition of water drops on the surface of objects near the earth's surface, or in the air caused by the condensation of water vapor around it. Characteristics of hydrometeor in the region of Semarang Ahmad Yani and Yogyakarta Adi Sucipto Airports discussed in this paper. The purpose of this research is to know and understand the characteristics of hydrometeor such as density vertical profiles and temporal variation of water content of liquid and solid water (ice) in the clouds and rain in the region Semarang Ahmad Yani and Yogyakarta Adi Sucipto Airports based on observations of Tropical Rainfall Measuring Mission (TRMM) satellite. The data used in this study were 3A12 TRMM data and the cumulative observations in the range 1998 to 2008. The results show that there are significant differences in terms of value and the level of maximum density altitude where the maximum density value of liquid water content in clouds, ice levels in the cloud, liquid water content in rain and ice levels in rain over area of Semarang Ahmad Yani and the Yogyakarta Adi Sucipto Airports observations during 1998-2008. In the area of Semarang Ahmad Yani Airport and the surrounding areas has maximum hydrometeor density in the period 1998. The maximum density of liquid water content of rain and that of clouds are 0.0048 g/m3 at an altitude of 3 km (LWC cloud) and 0.0028 g / m3 at an altitude of 1.5 km (LWC rain) , respectively; meanwhile in the Adi Sucipto Airport Yogyakarta and its surroundings, the period of the rainy season is also the period 1998 to the density of liquid water content of rain clouds and the maximum, but with slightly different values. Key words:Liquid water content, Solid water (ice) content, Hydrometeor"

"Penelitian ini dilakukan untuk melihat pengaruh El Nino 1997 terhadap variabilitas ozon total Indonesia 1997-2005. Data ozon global dari TOMS (Total Ozone Mapping Spectrometer) Satelit NASA pada rentang tahun 1997-2005 diekstrak untuk wilayah Indonesia (90W-150E, 12.5S-12.5N). Hasil plot deret waktu menunjukkan bahwa konsentrasi ozon total rata-rata bulanan bervariasi antara 242 hingga 275.38 (Dobson Units). Konsentrasi tertinggi terjadi pada Bulan September-Oktober dan terendah terjadi pada Bulan Desember-Januari. Konsentrasi ozon total di Indonesia meningkat pada saat terjadi El Nino kuat, yakni mencapai 275.38 DU. Hasil penelitian juga menunjukkan bahwa pada tahun terjadi El Nino lemah, yakni tahun 2002 dan 2004, konsentrasi ozon juga meningkat pada Bulan September yakni berturut-turut 271.40 dan 274.64 DU. Pada tahun-tahun tidak terjadi El Nino, yaitu 2001, 2003, 2005, konsentrasi ozon tertinggi berturut-turut pada September adalah: 270.06, 268.14, 262.68 DU. Wilayah di Indonesia yang dipengaruhi El Nino kuat selama September- Oktober 1997 adalah Halmahera, Sulawesi Utara, dan Papua Utara dengan konsentrasi ozon sebesar 282-294 DU. Pada wilayah lainnya konsentrasi juga meningkat menjadi 286-290 DU, yaitu Sulawesi Utara, Sulawesi Tengah, Maluku."