Characteristics of Magnetic Clouds and Interplanetary Coronal Mass Ejections Which Cause Intense Geomagnetic Storms
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NSF Current Newsletter Highlights Research and Education Efforts Supported by the National Science Foundation
March 2012 Each month, the NSF Current newsletter highlights research and education efforts supported by the National Science Foundation. If you would like to automatically receive notifications by e-mail or RSS when future editions of NSF Current are available, please use the links below: Subscribe to NSF Current by e-mail | What is RSS? | Print this page | Return to NSF Current Archive Robotic Surgery Systems Shipped to Medical Research Centers A set of seven identical advanced robotic-surgery systems produced with NSF support were shipped last month to major U.S. medical research laboratories, creating a network of systems using a common platform. The network is designed to make it easy for researchers to share software, replicate experiments and collaborate in other ways. Robotic surgery has the potential to enable new surgical procedures that are less invasive than existing techniques. The developers of the Raven II system made the decision to share it as the best way to move the field forward--though it meant giving competing laboratories tools that had taken them years to develop. "We decided to follow an open-source model, because if all of these labs have a common research platform for doing robotic surgery, the whole field will be able to advance more quickly," said Jacob Rosen, Students with components associate professor of computer engineering at the University of of the Raven II surgical California-Santa Cruz. Rosen and Blake Hannaford, director of the robotics systems. Credit: University of Washington Biorobotics Laboratory, led the team that Carolyn Lagattuta built the Raven system, initially with a U.S. -
Natural & Unnatural Disasters
Lesson 20: Disasters February 22, 2006 ENVIR 202: Lesson No. 20 Natural & Unnatural Disasters February 22, 2006 Gail Sandlin University of Washington Program on the Environment ENVIR 202: Lesson 20 1 Natural Disaster A natural disaster is the consequence or effect of a natural phenomenon becoming enmeshed with human activities. “Disasters occur when hazards meet vulnerability” So is it Mother Nature or Human Nature? ENVIR 202: Lesson 20 2 Natural Phenomena Tornadoes Drought Floods Hurricanes Tsunami Wild Fires Volcanoes Landslides Avalanche Earthquakes ENVIR 202: Lesson 20 3 ENVIR 202: Population & Health 1 Lesson 20: Disasters February 22, 2006 Naturals Hazards Why do Populations Live near Natural Hazards? High voluntary individual risk Low involuntary societal risk Element of probability Benefits outweigh risk Economical Social & cultural Few alternatives Concept of resilience; operationalized through policies or systems ENVIR 202: Lesson 20 4 Tornado Alley http://www.spc.noaa.gov/climo/torn/2005deadlytorn.html ENVIR 202: Lesson 20 5 Oklahoma City, May 1999 319 mph (near F6) 44 died, 795 injured 3,000 homes and 150 businesses destroyed ENVIR 202: Lesson 20 6 ENVIR 202: Population & Health 2 Lesson 20: Disasters February 22, 2006 World’s Deadliest Tornado April 26, 1989 1300 died 12,000 injured 80,000 homeless Two towns leveled Where? ENVIR 202: Lesson 20 7 Bangladesh ENVIR 202: Lesson 20 8 Hurricanes, Typhoons & Cyclones winds over 74 mph regional location 500,000 Bhola cyclone, 1970, Bangladesh 229,000 Typhoon Nina, 1975, China 138,000 Bangladesh cyclone, 1991 ENVIR 202: Lesson 20 9 ENVIR 202: Population & Health 3 Lesson 20: Disasters February 22, 2006 U.S. -
Effect of the Solar Wind Density on the Evolution of Normal and Inverse Coronal Mass Ejections S
A&A 632, A89 (2019) Astronomy https://doi.org/10.1051/0004-6361/201935894 & c ESO 2019 Astrophysics Effect of the solar wind density on the evolution of normal and inverse coronal mass ejections S. Hosteaux, E. Chané, and S. Poedts Centre for mathematical Plasma-Astrophysics (CmPA), Celestijnenlaan 200B, KU Leuven, 3001 Leuven, Belgium e-mail: [email protected] Received 15 May 2019 / Accepted 11 September 2019 ABSTRACT Context. The evolution of magnetised coronal mass ejections (CMEs) and their interaction with the background solar wind leading to deflection, deformation, and erosion is still largely unclear as there is very little observational data available. Even so, this evolution is very important for the geo-effectiveness of CMEs. Aims. We investigate the evolution of both normal and inverse CMEs ejected at different initial velocities, and observe the effect of the background wind density and their magnetic polarity on their evolution up to 1 AU. Methods. We performed 2.5D (axisymmetric) simulations by solving the magnetohydrodynamic equations on a radially stretched grid, employing a block-based adaptive mesh refinement scheme based on a density threshold to achieve high resolution following the evolution of the magnetic clouds and the leading bow shocks. All the simulations discussed in the present paper were performed using the same initial grid and numerical methods. Results. The polarity of the internal magnetic field of the CME has a substantial effect on its propagation velocity and on its defor- mation and erosion during its evolution towards Earth. We quantified the effects of the polarity of the internal magnetic field of the CMEs and of the density of the background solar wind on the arrival times of the shock front and the magnetic cloud. -
A Guide to Space Law Terms: Spi, Gwu, & Swf
A GUIDE TO SPACE LAW TERMS: SPI, GWU, & SWF A Guide to Space Law Terms Space Policy Institute (SPI), George Washington University and Secure World Foundation (SWF) Editor: Professor Henry R. Hertzfeld, Esq. Research: Liana X. Yung, Esq. Daniel V. Osborne, Esq. December 2012 Page i I. INTRODUCTION This document is a step to developing an accurate and usable guide to space law words, terms, and phrases. The project developed from misunderstandings and difficulties that graduate students in our classes encountered listening to lectures and reading technical articles on topics related to space law. The difficulties are compounded when students are not native English speakers. Because there is no standard definition for many of the terms and because some terms are used in many different ways, we have created seven categories of definitions. They are: I. A simple definition written in easy to understand English II. Definitions found in treaties, statutes, and formal regulations III. Definitions from legal dictionaries IV. Definitions from standard English dictionaries V. Definitions found in government publications (mostly technical glossaries and dictionaries) VI. Definitions found in journal articles, books, and other unofficial sources VII. Definitions that may have different interpretations in languages other than English The source of each definition that is used is provided so that the reader can understand the context in which it is used. The Simple Definitions are meant to capture the essence of how the term is used in space law. Where possible we have used a definition from one of our sources for this purpose. When we found no concise definition, we have drafted the definition based on the more complex definitions from other sources. -
UN Specialized Agencies and Governance for Global Risks
13 UN Specialized Agencies and Governance for Global Risks For the first time in human history, we have reached a level of scientific knowledge that allows us to develop an enlightened relationship to risks of catastrophic magnitude. Not only can we foresee many of the challenges ahead, but we are in a position to identify what needs to be done in order to mitigate or even eliminate some of those risks. Our enlightened status, however, also requires that we ... collectively commit to reducing them. 1 Allan Dafoe and Anders Sandberg The United Nations has grown far beyond the institutions directly provided for in the UN Charter. This chapter and those immediately following review a number of global issues and risks that have emerged largely since 1945 and the responses through the UN family of specialized agencies, programs and convention secretar- iats. We consider the efforts of the UN to develop more strategic and integrated approaches to the range of interrelated problems in sustainable development facing the world today. We then consider examples of reform in the economic, environ- mental and social dimensions, without attempting to be comprehensive. We first look at governance for the global economy, especially to address the major chal- lenges of growing inequality and the need for a level playing field for business. For the risks of instability in the financial system, we propose reinforcing the role of the International Monetary Fund (IMF) for enhanced financial governance. We then review global environmental governance, including climate change, as well as population and migration as significant global social issues. -
Relation Between Sunspots and Covid19 – a Proof for Panspermia
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 11 | Nov 2020 www.irjet.net p-ISSN: 2395-0072 RELATION BETWEEN SUNSPOTS AND COVID19 – A PROOF FOR PANSPERMIA Janani T1 1Department of Biotechnology, Kumaraguru College of Technology, Coimbatore, Tamilnadu, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - The novel viral or the bacterial pandemics and epidemics are not new to this earth. Often these disease-causing pathogens are of unknown origin and often identified as an infection which is transmitted from other animals. They are frequently found as the mutated form of the original strain or completely a newly developed strain. The causes for this mutation are many which comprises of both natural and artificial sources. The time of occurrence of these pandemic and epidemic astonishingly coincides with the sun spot extremum (often minimum). It is observed that whenever there is a sun spot extremum there was a novel microbial pandemic or epidemic. The current COVID19 pandemic is also suggested to be due to such sunspot extremum as the sun cycle is currently at its sun spot minimum. This review aims at providing the facts of relation between sunspots and the novel corona virus pandemic and there by stating this occurrence as a proof for panspermia. Key Words: Pandemic, Epidemic, COVID19, Sunspot, Solar Cycle, Solar minimum, Panspermia 1. INTRODUCTION 1.1 SUNSPOTS: Sunspots are the dark regions in the sun’s surface due to the concentration of magnetic field in that region. These regions are relatively colder to the other regions of the sun’s surface. Hotter region emits more light than the colder region hence these regions appear to be darker and called the spots of the sun. -
Predicting the Magnetic Vectors Within Coronal Mass Ejections Arriving at Earth: 2
Space Weather RESEARCH ARTICLE Predicting the magnetic vectors within coronal mass ejections 10.1002/2015SW001171 arriving at Earth: 1. Initial architecture Key Points: N. P.Savani1,2, A. Vourlidas1, A. Szabo2,M.L.Mays2,3, I. G. Richardson2,4, B. J. Thompson2, • First architectural design to predict A. Pulkkinen2,R.Evans5, and T. Nieves-Chinchilla2,3 a CME’s magnetic vectors (with eight events) 1 2 • Modified Bothmer-Schwenn CME Goddard Planetary Heliophysics Institute (GPHI), University of Maryland, Baltimore County, Maryland, USA, NASA 3 initiation rule to improve reliability Goddard Space Flight Center, Greenbelt, Maryland, USA, Institute for Astrophysics and Computational Sciences (IACS), of chirality Catholic University of America, Washington, District of Columbia, USA, 4Department of Astronomy, University of • CME evolution seen by remote Maryland, College Park, Maryland, USA, 5College of Science, George Mason University, Fairfax, Vancouver, USA sensing triangulation is important for forecasting Abstract The process by which the Sun affects the terrestrial environment on short timescales is Correspondence to: predominately driven by the amount of magnetic reconnection between the solar wind and Earth’s N. P. Savani, magnetosphere. Reconnection occurs most efficiently when the solar wind magnetic field has a southward [email protected] component. The most severe impacts are during the arrival of a coronal mass ejection (CME) when the magnetosphere is both compressed and magnetically connected to the heliospheric environment. Citation: Unfortunately, forecasting magnetic vectors within coronal mass ejections remain elusive. Here we report Savani, N. P., A. Vourlidas, A. Szabo, M.L.Mays,I.G.Richardson,B.J. how, by combining a statistically robust helicity rule for a CME’s solar origin with a simplified flux rope Thompson, A. -
Predictability of the Variable Solar-Terrestrial Coupling Ioannis A
https://doi.org/10.5194/angeo-2020-94 Preprint. Discussion started: 26 January 2021 c Author(s) 2021. CC BY 4.0 License. Predictability of the variable solar-terrestrial coupling Ioannis A. Daglis1,15, Loren C. Chang2, Sergio Dasso3, Nat Gopalswamy4, Olga V. Khabarova5, Emilia Kilpua6, Ramon Lopez7, Daniel Marsh8,16, Katja Matthes9,17, Dibyendu Nandi10, Annika Seppälä11, Kazuo Shiokawa12, Rémi Thiéblemont13 and Qiugang Zong14 5 1Department of Physics, National and Kapodistrian University of Athens, 15784 Athens, Greece 2Department of Space Science and Engineering, Center for Astronautical Physics and Engineering, National Central University, Taiwan 3Department of Physics, Universidad de Buenos Aires, Buenos Aires, Argentina 10 4Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 5Solar-Terrestrial Department, Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of RAS (IZMIRAN), Moscow, 108840, Russia 6Department of Physics, University of Helsinki, Helsinki, Finland 7Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA 15 8National Center for Atmospheric Research, Boulder, CO 80305, USA 9GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany 10IISER, Kolkata, India 11Department of Physics, University of Otago, Dunedin, New Zealand 12Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan 20 13LATMOS, Universite Pierre et Marie Curie, Paris, France 14School of Earth and Space Sciences, Peking University, Beijing, China 15Hellenic Space Center, Athens, Greece 16Faculty of Engineering and Physical Sciences, University of Leeds, Leeds, UK 17Christian-Albrechts Universität, Kiel, Germany 25 Correspondence to: Ioannis A. Daglis ([email protected]) Abstract. In October 2017, the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) Bureau established a 30 committee for the design of SCOSTEP’s Next Scientific Program (NSP). -
Identification of Interplanetary Coronal Mass Ejection with Magnetic Cloud in Year 2005 at 1 AU
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 3, ISSUE 6, JUNE 2014 ISSN 2277-8616 Identification Of Interplanetary Coronal Mass Ejection With Magnetic Cloud In Year 2005 At 1 AU D.S.Burud, R .S. Vhatkar, M. B. Mohite Abstract: Coronal mass ejection (CMEs) propagate in to the interplanetary medium are called as Interplanetary Coronal Mass Ejection (ICME). A set of signatures in plasma and magnetic field is used to identify the ICMEs. Magnetic Cloud (MC) is a special kind of ICMEs in which internal magnetic field configuration is similar like flux rope. We have used the data obtained from ACE Advance Composition Explorer (ACE) based in-situ measurements of Magnetic Field Experiment (MAG) and Solar Wind Electron, Proton and Alpha Monitor (SWEPAM) experiment for the data of magnetic field and plasma parameters respectively. The magnetic field data and plasma parameters of ICMEs used to distinguish them as magnetic cloud, non magnetic cloud. We analyzed eighteen ICMEs observed during January 2005 to December 2005, which is the beginning of declining phase of solar cycle 23. The analysis of magnetic field in the frames of the flux ropes like structure using a Minimum Variance Analysis (MVA) method, and have identified 30% ICMEs in the year 2005, which shows magnetic field rotation in a plane and confirmed as ICMEs with MCs. Keywords: magnetic cloud (MC), interplanetary coronal mass ejection (ICME), minimum variance analysis (MVA). ———————————————————— Introduction:- Table No: 1 Signatures used to identify ICMEs in the Coronal mass ejections (CMEs) are an energetic Heliosphere phenomenon originated in the Sun‘s corona, CMEs are eruptions of plasma and magnetic fields that drive space Sr.no. -
Magnetic Storms and Induction Hazards
News: Report Puts Timeline on Cutting Greenhouse Gas Emissions, p. 446 Meeting: Multidisciplinary Monitoring Experiments at Kawah Ijen Volcano, p. 447 What’s on the Web: Antarctic Expedition, Teaching Professional Skills, and More, p. 447 About AGU: Amazon Hack-A-Thon at Fall Meeting, p. 448 Research Spotlight: Magnetic Field Data, Ocean Acidification, and More, p. 452 VOLUME 95 NUMBER 48 2 DECEMBER 2014 Magnetic Storms and Induction Hazards Magnetic storms are potentially hazard- Electrical conductivity in the Earth’s inte- ous to the activities and technological infra- rior ranges from about 10-4 siemens per structure of modern civilization. This reality meter (S/m) in some parts of the upper man- was dramatically demonstrated during the tle to 3 S/m in the ocean. Generally speak- great magnetic storm of March 1989, when ing, electric power grids are susceptible to surface geoelectric fields, produced by the interference from naturally induced geoelec- interaction of the time-varying geomag- tric fields that vary with periods from about netic field with the Earth’s electrically con- 10 to 1000 seconds. Geomagnetic and geo- ducting interior, coupled onto the overlying electric field variation over such periods Hydro-Québec electric power grid in Can- plumbs the Earth’s interior across diffusive ada. Protective relays were tripped, the grid depth and length scales of between about 2 collapsed, and about 9 million people were and 3000 kilometers, but localized conduc- temporarily left without electricity [Bolduc, tivity anomalies can reduce the upper length 2002]. scale to about 50 kilometers. A magnetic storm that was, by some mea- As a subject of natural science, estimat- sures, the most intense ever recorded fol- ing the geoelectric field as a function of geo- lowed a solar flare observed by astronomers graphic location is distinct from the engi- Richard Carrington and Richard Hodgson neering subject of electric currents that in September 1859. -
Download Special Issue
Advances in Astronomy The Solar Cycle Guest Editors: J. Javaraiah, J. P. Rozelot, and Luca Bertello The Solar Cycle Advances in Astronomy The Solar Cycle Guest Editors: J. Javaraiah, J. P. Rozelot, and Luca Bertello Copyright © 2012 Hindawi Publishing Corporation. All rights reserved. This is a special issue published in “Advances in Astronomy.” All articles are open access articles distributed under the Creative Com- mons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Editorial Board Cesare Barbieri, Italy Martin Hardcastle, UK Valery Nakariakov, UK Joshua S. Bloom, USA Dean Hines, USA Jerome Orosz, USA Michael Brotherton, USA Dieter Horns, Germany George Pavlov, USA Giovanni Carraro, Italy Ivan Hubeny, USA Juri Poutanen, Finland Alberto J. Castro-Tirado, Spain John Hughes, USA Somak Raychaudhury, UK Michael Disney, UK Wing Huen Ip, Taiwan William Reach, USA Elmetwally Elabbasy, Egypt Valentina Klochkova, Russia Peter Roming, USA Nye Evans, UK Gregory Laughlin, USA Ata Sarajedini, USA Maurizio Falanga, Switzerland Myung G. Lee, Republic of Korea Regina Schulte-Ladbeck, USA Duncan Forbes, Australia Karen Leighly, USA Ravi Sheth, USA Andrew Fruchter, USA Jeffrey Linsky, USA Roberto Turolla, Italy B. T. Gansicke,¨ UK Mario Mateo, USA Gary Wegner, USA Paul Goldsmith, USA Ronald Mennickent, Chile Glenn J. White, UK Jonathan Grindlay, USA Zdzislaw E. Musielak, USA Paul J. Wiita, USA Contents The Solar Cycle,J.Javaraiah,J.P.Rozelot,andLucaBertello Volume 2012, Article ID 470631, 2 pages The Faint Young Sun Paradox: A Simplified Thermodynamic Approach, F. Angulo-Brown, MarcoA.Rosales,andM.A.Barranco-Jimenez´ Volume 2012, Article ID 478957, 10 pages Tendency of Discreteness of the Solar Amplitude and Intercycle Relatedness, Akio Yoshida and Ryan Sayre Volume 2012, Article ID 519852, 7 pages Rapid Disappearance of Penumbra-Like Features near a Flaring Polarity Inversion Line: The Hinode Observations, B. -
Ten Years of PAMELA in Space
Ten Years of PAMELA in Space The PAMELA collaboration O. Adriani(1)(2), G. C. Barbarino(3)(4), G. A. Bazilevskaya(5), R. Bellotti(6)(7), M. Boezio(8), E. A. Bogomolov(9), M. Bongi(1)(2), V. Bonvicini(8), S. Bottai(2), A. Bruno(6)(7), F. Cafagna(7), D. Campana(4), P. Carlson(10), M. Casolino(11)(12), G. Castellini(13), C. De Santis(11), V. Di Felice(11)(14), A. M. Galper(15), A. V. Karelin(15), S. V. Koldashov(15), S. Koldobskiy(15), S. Y. Krutkov(9), A. N. Kvashnin(5), A. Leonov(15), V. Malakhov(15), L. Marcelli(11), M. Martucci(11)(16), A. G. Mayorov(15), W. Menn(17), M. Mergè(11)(16), V. V. Mikhailov(15), E. Mocchiutti(8), A. Monaco(6)(7), R. Munini(8), N. Mori(2), G. Osteria(4), B. Panico(4), P. Papini(2), M. Pearce(10), P. Picozza(11)(16), M. Ricci(18), S. B. Ricciarini(2)(13), M. Simon(17), R. Sparvoli(11)(16), P. Spillantini(1)(2), Y. I. Stozhkov(5), A. Vacchi(8)(19), E. Vannuccini(1), G. Vasilyev(9), S. A. Voronov(15), Y. T. Yurkin(15), G. Zampa(8) and N. Zampa(8) (1) University of Florence, Department of Physics, I-50019 Sesto Fiorentino, Florence, Italy (2) INFN, Sezione di Florence, I-50019 Sesto Fiorentino, Florence, Italy (3) University of Naples “Federico II”, Department of Physics, I-80126 Naples, Italy (4) INFN, Sezione di Naples, I-80126 Naples, Italy (5) Lebedev Physical Institute, RU-119991 Moscow, Russia (6) University of Bari, I-70126 Bari, Italy (7) INFN, Sezione di Bari, I-70126 Bari, Italy (8) INFN, Sezione di Trieste, I-34149 Trieste, Italy (9) Ioffe Physical Technical Institute, RU-194021 St.