Tectonic Features of the Southern Sumatra-Western Java Forearc of Indonesia
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And S-Wave Velocity Structures and the in Uence Of
P- and S-wave Velocity Structures and the Inuence of Volcanic Activities in the East Java Area from Seismic Tomography Syawaldin Ridha Department of Physics, Universitas Brawijaya, Indonesia Sukir Maryanto ( [email protected] ) Universitas Brawijaya https://orcid.org/0000-0002-1882-6818 Agustya A. Martha Meteorological, Climatological, and Geophysical Agency, Indonesia Vanisa Syahra Department of Physics, Universitas Brawijaya, Indonesia Muhajir Anshori Meteorological, Climatological, and Geophysical Agency, Indonesia Pepen Supendi Meteorological, Climatological, and Geophysics Agency, Indonesia Sri Widiyantoro Bandung Institute of Technology: Institut Teknologi Bandung Research Letter Keywords: seismic tomography, East Java, Vp/Vs, Vp, Vs, partial melting Posted Date: May 6th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-438689/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/24 Abstract Indonesia is one of the most interesting targets for seismic tomographic studies due to its tectonic complexity. The subduction zone was formed when the Indian oceanic plate was subducted beneath the Eurasian continental plate. This activity caused the formation of volcanoes along the Sunda Arc, including the area of East Java. In this study, we aim to identify the inuence of volcanic activities which extends from the west to the east of East Java. We used the data of 1,383 earthquakes, recorded by the 22 stations of the Indonesia Tsunami Early Warning System (InaTEWS) seismic network. We relocated the earthquakes and conducted a tomographic study using SIMULPS12. We then explored the anomalies of P- and S-wave velocities and Vp/Vs ratio. The low-velocity zone was observed in the volcanic area related to the partial melting zone or magma chamber with high Vp/Vs. -
Volcanic Eruption Impacts Student Worksheet
Volcanic Eruption Impacts Student Worksheet Explosive and Effusive Volcanoes The type of volcanic eruption is largely determined by magma composition. Flux-mediated melting at subduction zones creates a felsic magma with high levels of carbon dioxide and water. These dissolved gases explode during eruption. Effusive volcanoes have a hotter, more mafic magma with lower levels of dissolved gas, allowing them to erupt more calmly (effusive eruption). Sinabung (Indonesia) Mount Sinabung is a stratovolcano located 40 km from the Lake Toba supervolcano in North Sumatra. It lies along the Sunda Arc, where the Indo-Australian plate subducts beneath the Sunda and Burma plates. After 1200 years of dormancy, Sinabung began erupting intermittently in 2010. Major eruptions have occurred regularly since November 2013. In November and December 2015, ash plumes reached 6 – 11 km in height on multiple occasions. Pyroclastic flows and ashfall blanketed the region in January 2014 and lava flows travelled down the south flank, advancing 2.5 km by April 2014. Pyroclastic flows in February 2014 killed 17 people in a town 3 km from the vent. In June 2015, ash falls affected areas 10 – 15 km from the summit on many occasions. A lahar in May 2016, caused fatalities in a village 20 km from Sinabung. Pyroclastic flows occurred frequently throughout 2016 and 2017 Eruption of Sinabung 6 October 2016 Major eruptions occurred in 2018 and 2019. In (Y Ginsu, public domain) February 2018, an eruption destroyed a lava dome of 1.6 million cubic metres. At least 10 pyroclastic flows extended up to 4.9 km and an ash plume rose more than 16 km in altitude. -
Title Characteristics of Seismicity Distribution Along the Sunda Arc
Characteristics of Seismicity Distribution along the Sunda Arc: Title Some New Observations Author(s) GHOSE, Ranajit; OIKE, Kazuo Bulletin of the Disaster Prevention Research Institute (1988), Citation 38(2): 29-48 Issue Date 1988-06 URL http://hdl.handle.net/2433/124954 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University Bull. Disas. Prey. Res. Inst., Kyoto Univ., Vol. 38, Part 2, No. 332, June, 1988 29 Characteristics of Seismicity Distribution along the Sunda Arc: Some New Observations By Ranajit GHOSEand Kazuo OIKE (Manuscript received March 7, 1988) Abstract Spatio-temporal variations of earthquake activity along the Sunda arc were investigated. We prepared a strain release map for this century. Adjacent to the zones of high strain release, presence of seismically quiet zones was noted. A careful inspection of the depth distribution of the earthquakes revealed that in the eastern Sunda arc, possibly there exists a zone of scarce seismicity at an interme- diate depth. We discussed the probable implications. We also analysed the patterns of temporal distributions of earthquakes at the three different seismotectonic provinces of the Sunda arc—Sumatra, Java, and the Lesser Sunda Islands. We could clearly see that, although the causative geodynamic situations for seismicity vary significantly in space along the length of the arc, the period of increase or decrease in seismicity is largely space invariant. The locally differing levels of seismicity are superposed on the common background of long period seismicity fluctuation. Finally, clustering of seismicity at some patches along the Sunda arc was studied with respect to the altimetric gravity anomaly data. We noted some apparent conformities. -
Hendy Kusmarian
Dihimpun dan disunting oleh Hendy Kusmarian 0 34 Zamrud Khatulistiwa Harga Rp 105.000 Penghimpun & Penyunting: Hendy Kusmarian WA 081.359.652.401 Tukar Rumah Keliling Indonesia http://abiysuryaonline.com Dipersembahkan untuk semua anak bangsa yang mencintai tanah air yang sangat indah ini Buku ini disusun menyambut Hari Ulang Tahun ke-73 Republik Indonesia di tahun 2018 ini. 300 halaman penuh foto warna tentang detil-detil geografis, sejarah, ekonomi, sosial, budaya, dan pariwisata dari ke-34 provinsi Indonesia. Disusun menurut abjad mulai Aceh sampai Yogyakarta. Seluruh isi buku ini bersumber dari Wikipedia bahasa Indonesia di https://id.wikipedia.org Semua anak bangsa kini bisa mendapat penghasilan ekstra dari ebook ini. Dengan mempromosikan ebook ini lewat link afiliasi unik Anda, Anda akan menerima komisi 50% untuk tiap pembelian ebook ini yang Anda hasilkan. Untuk itu Anda harus lebih dulu menjadi mitra afiliasi dari Ratakan.com, yaitu Marketplace Produk Digital Indonesia. Silakan kunjungi https://www.ratakan.com untuk membuat akun Anda gratis. Setelah itu anda bisa mulai mempromosikan dan meraup komisi dari puluhan produk digital lainnya, bukan hanya ebook ini. Tolong cetak dan jilid secara khusus ebook ini demi kenyamanan Anda dalam membaca dan agar mudah dibawa-bawa dalam petualangan Anda menjelajah negeri. 1 Daftar Isi 1. Aceh ………………………………………………………………………………………………. 3 2. Bali ………………………………………………………………………………………………... 16 3. Banten ……………………………………………………………………………………………. 24 4. Bengkulu …………………………………………………………………………………………. 34 5. Gorontalo -
Socio-Cultural Relations Between India and Indonesia
Proceeding of the International Seminar and Conference 2015: The Golden Triangle (Indonesia-India-Tiongkok) Interrelations in Religion, Science, Culture, and Economic. University of Wahid Hasyim, Semarang, Indonesia. August 28-30, 2015 Paper No. C.9 Socio-Cultural Relations Between India and Indonesia Mohd Tahseen Zaman Department of Islamic Studies, Jamia Millia Islamia University Jamia Nagar, New Delhi-110025, India Phone: +91(11)26981717, 26984617, 26984658, 26988044, 26987183, Fax: +91(11)2698 0229 [email protected] Abstract- India and Indonesia are two nations that from its inception, have a strong historical relation; cultural as well as intellectual. Both have some in common and similarities in many aspects. In India and Indonesia there are multiple religions, beliefs, ethnicities, languages, cultures that share and interact each other. The most interesting thing is both have shared cultural relations manifested in daily life. Some historians assumed that India‟s influence on Indonesian‟s culture is quite dominant, moreover, until the nineteenth century the Malay people received everything from India: their religion, their political system, astrology, medicine, literature, art and technical skills. Therefore this study is basically based on historical investigation and focuses on cultural analysis between Indonesia and India. Keywords: culture, shared, inception, ties Introduction The socio-cultural relations between India and Indonesia are very old. The Indian cultural impact has been seen in the all sphere of Indonesian‟s people life. They share lot of religious and cultural similarity with India. According to historical evidences the contact between India and Indonesia has been established during the beginning of the Christian era. “Traders from India, particularly from its eastern and southern coastal regions, travelled far and wide in the pursuit of trade and established trade relations with the countries of the region which is now known as Southeast Asia, and then was known as Dvipantara of Suvarndvipa. -
Asian Green Mussels Perna Viridis (Linnaeus, 1758) Detected in Eastern Indonesia
BioInvasions Records (2015) Volume 4, Issue 1: 23–29 Open Access doi: http://dx.doi.org/10.3391/bir.2015.4.1.04 © 2015 The Author(s). Journal compilation © 2015 REABIC Rapid Communication A ferry line facilitates dispersal: Asian green mussels Perna viridis (Linnaeus, 1758) detected in eastern Indonesia Mareike Huhn1,2*, Neviaty P. Zamani1 and Mark Lenz2 1Marine Centre, Department of Marine Science and Technology, Bogor Agricultural University, Jalan Lingkar Akademi, Kampus IPB Dramaga, Bogor 16680, West Java, Indonesia 2GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany E-mail: [email protected] (MH), [email protected] (NZ), [email protected] (ML) *Corresponding author Received: 6 June 2014 / Accepted: 30 October 2014 / Published online: 8 December 2014 Handling editor: Demetrio Boltovskoy Abstract While part of a single country, the Indonesian archipelago covers several biogeographic regions, and the high levels of national shipping likely facilitate transfer of non-native organisms between the different regions. Two vessels of a domestic shipping line appear to have served as a transport vector for the Asian green mussel Perna viridis (Linnaeus, 1758) between regions. This species is indigenous in the western but not in the eastern part of the archipelago, separated historically by the Sunda Shelf. The green mussels collected from the hulls of the ferries when in eastern Indonesia showed a significantly lower body condition index than similar-sized individuals from three different western-Indonesian mussel populations. This was presumably due to reduced food supply during the ships’ voyages. Although this transport- induced food shortage may initially limit the invasive potential (through reduced reproductive rates) of the translocated individuals, the risk that the species will extend its distributional range further into eastern Indonesia is high. -
SR 53(7) 28-29.Pdf
SHORT FEATURE NIKHILANAND PANIGRAHY Mt. Tambora Volcano with its caldera after eruption HE Sun is our default light option. But what happens when But the effect was not just limited to Indonesia. The Tit does not shine? destruction was spread far and wide. Even European countries In the year 1815, the repercussion of a very unusual event could not be spared of its evil consequences. The atmosphere in was felt worldwide for a fairly long period. The incident was the West was covered by the volcanic ash of Tambora, as a result a volcanic eruption in Mount Tambora. In Indonesia, there is of which the sun-rays could not reach the surface of the Earth. an island Sumbawa in its peninsula. This is a part of the Sunda Due to reduction of solar warmth, heavy snowfall and fatal frost islands that forms a segment of Sunda Arc. This is recognised as was found even during June to August, 1816. There was intense a string of volcanic islands. cold and the situation turned worse as famine-conditions In Mount Tambora, there exists a stratovolcano. It contains developed in European and North American countries. lava, pumice, volcanic ash, other materials and different gases. Many people from England started to rush to the lake side In many cases, a volcano looks like a cone, as the hot liquid lava of Geneva, Switzerland for warm climatic conditions. Such a emerging from it cannot fl ow to long distances away from the discouraging state of affair and unfair weather continued for vent or opening of the volcano, due to large viscosity. -
Seismic Activity Around and Under Krakatau Volcano, Sunda Arc: Constraints to the Source Region of Island Arc Volcanics
SEISMIC ACTIVITY AROUND AND UNDER KRAKATAU VOLCANO, SUNDA ARC: CONSTRAINTS TO THE SOURCE REGION OF ISLAND ARC VOLCANICS ALEŠ ŠPI ČÁK , VÁCLAV HANUŠ AND JIŘÍ VAN ĚK Geophysical Institute, Academy of Sciences of the Czech Republic, Prague, Czech Republic * ABSTRACT There is general agreement that calc-alkaline volcanic rocks at convergent plate margins are genetically related to the process of subduction (Ringwood, 1974; Maaloe and Petersen, 1981; Hawkesworth et al., 1997). However, opinions on the mode and site of generation of primary magma for island arc volcanism differ substantially. The site of generation of calc-alkaline magma is thought to be either in the mantle wedge (Plank and Langmuir, 1988; McCulloch and Gamble, 1991) or in the subducting slab (White and Dupré, 1986; Defant and Drummond, 1990; Edwards et al., 1993; Ryan and Langmuir, 1993). We present seismological evidence in favour of the latter concept. A distinctive seismicity pattern around and under the Krakatau volcano was identified during systematic studies of the SE Asian convergent plate margins by means of global seismological data. A column-like cluster of events, probably associated with the dynamics of the volcano, is clearly separated from the events in the Wadati-Benioff zone. The accuracy of hypocentral determinations of the events of the cluster does not differ from the accuracy of the events belonging to the subducting slab. The depths of the cluster events vary from very shallow to about 100 km without any apparent discontinuity. On the other hand, there is a pronounced aseismic gap in the Wadati-Benioff zone directly beneath the volcano at depths between 100-150 km. -
Petrogenesis of Rinjani Post-1257-Caldera-Forming-Eruption Lava Flows
Indonesian Journal on Geoscience Vol. 3 No. 2 August 2016: 107-126 INDONESIAN JOURNAL ON GEOSCIENCE Geological Agency Ministry of Energy and Mineral Resources Journal homepage: hp://ijog.geologi.esdm.go.id ISSN 2355-9314, e-ISSN 2355-9306 Petrogenesis of Rinjani Post-1257-Caldera-Forming-Eruption Lava Flows Heryadi Rachmat1,2, Mega Fatimah Rosana1, A. Djumarma Wirakusumah3, and Gamma Abdul Jabbar4 1Faculty of Geology, Padjadjaran University Jln. Raya Bandung - Sumedang Km. 21, Jatinangor, Sumedang, Indonesia 2Geological Agency Jln. Diponegoro No. 57, Bandung, Indonesia 3Energy and Mineral Institute Jln. Gajah Mada, Karangboyo, Cepu, Kabupaten Blora, Indonesia 4Hokkaido University, Kita 10, Nishi 8, Sapporo, Japan Corresponding author: [email protected] Manuscript received: March 7, 2016; revised: May 17, 2016; approved: June 29, 2016; available online: August 2, 2016 Abstract - After the catastrophic 1257 caldera-forming eruption, a new chapter of Old Rinjani volcanic activity began with the appearance of Rombongan and Barujari Volcanoes within the caldera. However, no published petrogenetic study focuses mainly on these products. The Rombongan eruption in 1944 and Barujari eruptions in pre-1944, 1966, 1994, 2004, and 2009 produced basaltic andesite pyroclastic materials and lava flows. A total of thirty-one samples were analyzed, including six samples for each period of eruption except from 2004 (only one sample). The samples were used for petrography, whole-rock geochemistry, and trace and rare earth element analyses. The Rombongan and Barujari lavas are composed of calc-alkaline and high K calc-alkaline porphyritic basaltic andesite. The magma shows narrow variation of SiO2 content that implies small changes during its generation. -
Reconstruction of the 2018 Anak Krakatau Collapse Using Planetscope Imaging and Numerical Modeling
Michigan Technological University Digital Commons @ Michigan Tech Dissertations, Master's Theses and Master's Reports 2020 Reconstruction of the 2018 Anak Krakatau collapse using PlanetScope imaging and numerical modeling Davide Saviano Michigan Technological University, [email protected] Copyright 2020 Davide Saviano Recommended Citation Saviano, Davide, "Reconstruction of the 2018 Anak Krakatau collapse using PlanetScope imaging and numerical modeling", Open Access Master's Thesis, Michigan Technological University, 2020. https://doi.org/10.37099/mtu.dc.etdr/989 Follow this and additional works at: https://digitalcommons.mtu.edu/etdr Part of the Geology Commons, Geomorphology Commons, Tectonics and Structure Commons, and the Volcanology Commons RECONSTRUCTION OF THE 2018 ANAK KRAKATAU COLLAPSE USING PLANETSCOPE IMAGING AND NUMERICAL MODELING By Davide Saviano A THESIS Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE In Geology MICHIGAN TECHNOLOGICAL UNIVERSITY 2020 © 2020 Davide Saviano This thesis has been approved in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE in Geology. Department of Geological & Mining Engineering & Sciences Thesis Co-Advisor: Dr. Simon A. Carn Thesis Co-Advisor: Dr. Gianluca Groppelli Committee Member: Dr. Roohollah R. Askari Department Chair: Dr. John S. Gierke Table of Contents Abstract ............................................................................................................................... v 1 Introduction .............................................................................................................. -
GEOGRAFI DAN IKLIM Kabupaten Pandeglang Dalam Angka 2018| I
GEOGRAFI DAN IKLIM Kabupaten Pandeglang Dalam Angka 2018| i Kabupaten Pandeglang Dalam Angka Pandeglang Regency in Figures 2018 ISSN: 2085-6059 No. Publikasi/Publication Number: 3601.1804 Katalog/Catalog: 1102001.3601 Ukuran Buku/Book Size: 14,8 cm x 21 cm Jumlah Halaman/Number of Pages: xxxvii + 361 halaman /pages Naskah/Manuscript: Badan Pusat Statistik Kabupaten Pandeglang BPS-Statistics of Pandeglang Regency Gambar Kover oleh/Cover Designed by: Badan Pusat Statistik Kabupaten Pandeglang BPS-Statistics of Pandeglang Regency Ilustrasi Kover/Cover Illustration: Tugu Jam, Pandeglang/ Clock Monumen, Pandeglang Diterbitkan oleh/Published by: © BPS Kabupaten Pandeglang/BPS-Statistics of Pandeglang Regency Dicetak oleh/Printed by: Percetakan Rajawali, Pandeglang Dilarang mengumumkan, mendistribusikan, mengomunikasikan, dan/atau menggandakan sebagian atau seluruh isi buku ini untuk tujuan komersial tanpa izin tertulis dari Badan Pusat Statistik Prohibited to announce, distribute, communicate, and/or copy part or all of this book for commercial purpose without permission from BPS-Statistics Indonesia ii | Pandeglang Regency in Figures 2018 GEOGRAFI DAN IKLIM PETA WILAYAH KABUPATEN PANDEGLANG MAP OF PANDEGLANG REGENCY Kabupaten Pandeglang Dalam Angka 2018| iii iv | Pandeglang Regency in Figures 2018 GEOGRAFI DAN IKLIM KEPALA BPS KABUPATEN PANDEGLANG CHIEF STATISTICIAN OF PANDEGLANG REGENCY Tri Tjahjo Purnomo, M.Si. Kabupaten Pandeglang Dalam Angka 2018| v vi | Pandeglang Regency in Figures 2018 GEOGRAFI DAN IKLIM KATA PENGANTAR Publikasi Kabupaten Pandeglang Dalam Angka 2018 merupakan publikasi rutin yang diterbitkan setiap tahun oleh BPS Kabupaten Pandeglang. Publikasi ini berisi kumpulan data yang sebagian besar merupakan data sekunder, yaitu data yang diperoleh dari Instansi, Dinas/Perusahaan baik Pemerintah maupun Swasta yang berada di wilayah Kabupaten Pandeglang. -
Coastal Phytoplankton Pigments Composition in Three Tropical Estuaries of Indonesia
Journal of Marine Science and Engineering Article Coastal Phytoplankton Pigments Composition in Three Tropical Estuaries of Indonesia Ario Damar 1,2,*, Franciscus Colijn 3, Karl-Juergen Hesse 4 and Fery Kurniawan 1,2 1 Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University (Bogor Agricultural University), Jl. Agatis Darmaga Bogor, Bogor 16680, Indonesia; [email protected] 2 Center for Coastal and Marine Resources Studies, IPB University (Bogor Agricultural University), Kampus IPB Baranangsiang, Jl. Raya Pajajaran No. 1, Bogor 16127, Indonesia 3 Institute for Coastal Research, Centre for Material and Coastal Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, 21502 Geesthacht, Germany; [email protected] 4 Forschungs-und Technologiezentrum, Westküste, Hafentörn, 25761 Büsum, Germany; [email protected] * Correspondence: [email protected]; Tel.: +62-813-1065-6861 Received: 20 March 2020; Accepted: 28 April 2020; Published: 29 April 2020 Abstract: In this study, the composition and distribution of phytoplankton pigments and its relation to nutrients and light was investigated, and an elaboration of using it as a proxy for phytoplankton group composition followed, in different nutrient-level tropical bays of Indonesia. Phytoplankton pigment analysis by using High Performance Liquid Chromatographer (HPLC) resulted in a set of pigments of chlorophyll-a (Chl-a), chlorophyll-b (Chl-b), chlorophyll-c (Chl-c), lutein, zeaxanthin, fucoxanthin, peridinin, diadinoxanthin, and ß-carotene. Linear multi regression and multivariate principal component analysis (PCA) showed that algae pigments correlate positively with nutrients and are not significantly correlated with underwater light and water transparency, suggesting important roles of nutrients for phytoplankton development in tropical estuaries.