skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Vertical deformation at western part of Sumatra

Abstract

This research tries to make advancement in GPS signal processing to estimate the interseismic vertical deformation field at western part of Sumatra Island. The data derived by Continuous Global Positioning System (CGPS) from Badan Informasi Geospasial (BIG) between 2010 and 2012. GPS Analyze at Massachusetts Institute of Technology (GAMIT) software and Global Kalman Filter (GLOBK) software are used to process the GPS signal to estimate the vertical velocities of the CGPS station. In order to minimize noise due to atmospheric delay, Vienna Mapping Function 1 (VMF1) is used as atmospheric parameter model and include daily IONEX file provided by the Center for Orbit Determination in Europe (CODE) as well. It improves GAMIT daily position accuracy up to 0.8 mm. In a second step of processing, the GLOBK is used in order to estimate site positions and velocities in the ITRF08 reference frame. The result shows that the uncertainties of estimated displacement velocity at all CGPS stations are smaller than 1.5 mm/yr. The subsided deformation patterns are seen at the northern and southern part of west Sumatra. The vertical deformation at northern part of west Sumatra indicates postseismic phase associated with the 2010 and 2012 Northern Sumatra earthquakes and also the long-term postseismicmore » associated with the 2004 and 2005 Northern Sumatra earthquakes. The uplifted deformation patterns are seen from Bukit Tinggi to Seblat which indicate a long-term interseismic phase after the 2007 Bengkulu earthquake and 2010 Mentawai earthquake. GANO station shows a subsidence at rate 12.25 mm/yr, indicating the overriding Indo-Australia Plate which is dragged down by the subducting Southeast Asian Plate.« less

Authors:
; ;
Publication Date:
OSTI Identifier:
22391585
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1658; Journal Issue: 1; Conference: ISEDM 2014: 4. International Sympsoium on Earthquake and Disaster Mitigation 2014, Bandung (Indonesia), 11-12 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DATA PROCESSING; DEFORMATION; EARTHQUAKES; G CODES; GEOLOGIC MODELS; GEOPHYSICS; GLOBAL POSITIONING SYSTEM; MAPPING; PLATES; SEISMICITY; SEISMOLOGY; SIGNALS; VELOCITY

Citation Formats

Febriyani, Caroline, E-mail: caroline.fanuel@students.itb.ac.id, Prijatna, Kosasih, E-mail: prijatna@gd.itb.ac.id, and Meilano, Irwan, E-mail: irwan.meilano@gd.itb.ac.id. Vertical deformation at western part of Sumatra. United States: N. p., 2015. Web. doi:10.1063/1.4915033.
Febriyani, Caroline, E-mail: caroline.fanuel@students.itb.ac.id, Prijatna, Kosasih, E-mail: prijatna@gd.itb.ac.id, & Meilano, Irwan, E-mail: irwan.meilano@gd.itb.ac.id. Vertical deformation at western part of Sumatra. United States. doi:10.1063/1.4915033.
Febriyani, Caroline, E-mail: caroline.fanuel@students.itb.ac.id, Prijatna, Kosasih, E-mail: prijatna@gd.itb.ac.id, and Meilano, Irwan, E-mail: irwan.meilano@gd.itb.ac.id. 2015. "Vertical deformation at western part of Sumatra". United States. doi:10.1063/1.4915033.
@article{osti_22391585,
title = {Vertical deformation at western part of Sumatra},
author = {Febriyani, Caroline, E-mail: caroline.fanuel@students.itb.ac.id and Prijatna, Kosasih, E-mail: prijatna@gd.itb.ac.id and Meilano, Irwan, E-mail: irwan.meilano@gd.itb.ac.id},
abstractNote = {This research tries to make advancement in GPS signal processing to estimate the interseismic vertical deformation field at western part of Sumatra Island. The data derived by Continuous Global Positioning System (CGPS) from Badan Informasi Geospasial (BIG) between 2010 and 2012. GPS Analyze at Massachusetts Institute of Technology (GAMIT) software and Global Kalman Filter (GLOBK) software are used to process the GPS signal to estimate the vertical velocities of the CGPS station. In order to minimize noise due to atmospheric delay, Vienna Mapping Function 1 (VMF1) is used as atmospheric parameter model and include daily IONEX file provided by the Center for Orbit Determination in Europe (CODE) as well. It improves GAMIT daily position accuracy up to 0.8 mm. In a second step of processing, the GLOBK is used in order to estimate site positions and velocities in the ITRF08 reference frame. The result shows that the uncertainties of estimated displacement velocity at all CGPS stations are smaller than 1.5 mm/yr. The subsided deformation patterns are seen at the northern and southern part of west Sumatra. The vertical deformation at northern part of west Sumatra indicates postseismic phase associated with the 2010 and 2012 Northern Sumatra earthquakes and also the long-term postseismic associated with the 2004 and 2005 Northern Sumatra earthquakes. The uplifted deformation patterns are seen from Bukit Tinggi to Seblat which indicate a long-term interseismic phase after the 2007 Bengkulu earthquake and 2010 Mentawai earthquake. GANO station shows a subsidence at rate 12.25 mm/yr, indicating the overriding Indo-Australia Plate which is dragged down by the subducting Southeast Asian Plate.},
doi = {10.1063/1.4915033},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1658,
place = {United States},
year = 2015,
month = 4
}
  • The Beruk Field in the middle of deep swamps in central Sumatra began producing 30,000 bbl per day of low-sulfur crude in March 1980; this Field plus others in Socal's Coastal Plains contract are expected to be producing 90,000 barrels of oil a day by 1982. Construction and development of the difficult site required an $82 million investment to build a floating road, pipeline, power lines, and a permanent camp. (DCK)
  • Dating of basalts of late Cenozoic age that have been displaced by recurrent movement along fault systems of the western Colorado Plateau indicates that perennial streams downcut quickly after uplifts. The rate of downcutting of the offset basalts upstream from a fault is largely a function of the amount of uplift. Minimum uplift rates can be estimated by comparing present stream profiles to the profiles that existed before extrusion of the lava flows. A preliminary study of the valleys of the Virgin River and adjacent drainage systems indicates that the estern margin of the Basin and Range province has beenmore » rising in relative altitude at roughly 25 m/m.y. Grand Wash area, at least 90 m/m.y. in the block between the Grand Wash and Hurricane faults, and 390 m/m.y. in the block east of the Hurricane fault.« less
  • Thirteen species of planktonic foraminifera collected with vertically stratified zooplankton tows in the slope water, Gulf Stream cold core ring, and northern Sargasso Sea show significant differences in their vertical distributions in the upper 200 meters of these different hydrographic regimes. Gulf Stream cold core rings may be responsible for a southern displacement of the faunal boundary associated with the Gulf Stream when reconstructed from the deep-sea sediment record. Oxygen isotope analyses of seven species reveal that nonspinose species (algal symbiont-barren) apparently calcify in oxygen isotope equilibrium, whereas spinose species usually calcify out of oxygen isotope equilibrium by approximately -0.3more » to -0.4 per mil in delta/sup 18/O values. The isotope data indicate that foraminifera shells calcify in depth zones that are significantly narrower than the overall vertical distribution of a species would imply.« less
  • A time series of sinking particles from the western Arabian Sea was analyzed for aliphatic and polycyclic aromatic hydrocarbons, polychlorinated biphenyls, 4,4{prime}-DDT and 4,4{prime}-DDE, to assess the role of monsoons on their vertical flux in the Indian Ocean. Concurrently, molecular markers such as sterols and linear and branched alkanes were analyzed enabling the characterization of the biogenic sources and biogeochemical processes occurring during the sampling period. Hierarchical cluster analysis (HCA) of the data set of concentrations and fluxes of these compounds confirmed a seasonal variability driven by the SW and NE monsoons. Moreover, the influence of different air masses ismore » evidenced by the occurrence of higher concentrations of DDT, PCBs, and pyrolytic PAHs during the NE monsoon and of fossil hydrocarbons during the SW monsoon. Total annual fluxes to the deep Arabian Sea represent an important removal contribution of persistent organic pollutants, thus not being available for the global distillation process (volatilization and atmospheric transport from low or mid latitudes to cold areas). Therefore, monsoons may play a significant role on the global cycle of organic pollutants.« less
  • We report here the first evidence of vertical transmission of Aedes flavivirus (AEFV) and its first isolation in the Western Hemisphere. AEFV strain SPFLD-MO-2011-MP6 was isolated in C6/36 cells from a pool of male Aedes albopictus mosquitoes that were reared to adults from larvae collected in southwest Missouri, USA, in 2011. Electron micrographs of the virus showed virions of approximately 45 nm in diameter with morphological characteristics associated with flaviviruses. The genomic sequence demonstrated that AEFV-SPFLD-MO-2011-MP6 shares a high degree of nucleotide and amino acid sequence identity with the AEFV Narita-21 strain, isolated in Japan in 2003. Intracerebral inoculation ofmore » newborn mice with the virus failed to produce observable illness or death and the virus did not replicate in vertebrate cells, consistent with a lack of vertebrate host range. - Highlights: ► The first report of Aedes flavivirus (AEFV) in the Western Hemisphere. ► The first evidence of vertical transmission of AEFV in mosquitoes. ► The first electron micrograph of AEFV. ► The first attempt to infect animals with AEFV.« less