We have found an error in the processing of the LASCO mass images since mid-2003. The s/c 180 deg roll every 3 months was not being taken care of when the sector was selected for the mass measurement. This resulted in artificially lower masses which gave rise to the 6-month periodicity signal in our results.
URL: http://cdaw.gsfc.nasa.gov/CME_list/radio/waves_type2.html
The CDAW Data Center announces a new catalog of type II radio bursts detected by the Radio and Plasma Wave (WAVES) experiment on board the Wind spacecraft and the associated coronal mass ejections (CMEs) observed by the Solar and Heliospheric Observatory (SOHO). The catalog also contains information on the associated flares (X-ray importance, and NOAA active region number). The CME sources are also listed, as derived from the Solar Geophysical Data listing or from inner coronal images such as Yohkoh/SXT and SOHO/EIT. The type II bursts are also linked to Javascript movies made with the radio dynamic spectrum and SOHO/LASCO/EIT images. Finally, the type II bursts are linked to three-day overview plots of solar energetic particle events (protons in the >10, >50 and >100 MeV GOES channels), GOES soft X-ray light curves, and CME height-time history. The CMEs in this catalog are called radio-loud CMEs because of their ability to produce type II radio bursts. For questions and comments, please contact Nat Gopalswamy (gopals at ssedmail dot gsfc dot nasa dot gov). This work was supported by NASA's Virtual Observatories for Heliophysics Data Program.
Coronal Mass Ejections of cycle 23
N. Gopalswamy
Major Scientific Results from SOHO on Coronal Mass Ejections
N. Gopalswamy, B. Fleck and J. B. Gurman
Workshop Highlights Progress in Solar-Heliospheric Physics
N. Gopalswamy
Long Lived Geomagnetic Storms and Coronal Mass Ejections
H. Xie, N. Gopalswamy, P.K. Manoharan, A. Lara, S. Yashiro, and S. Lepri
Type II Radio Bursts and Energetic Solar Eruptions
N. Gopalswamy, E. Aguilar-Rodriguez, S. Yashiro, S. Nunes, M. L. Kaiser, and R. A. Howard
Visibility of coronal mass ejections as a function of flare location
and intensity
S. Yashiro, N. Gopalswamy, S. Akiyama, G. Michalek, and R. A. Howard
A Universal Characteristic of Type II Radio Bursts
E. Aguilar-Rodriguez, N. Gopalswamy, R. MacDowall, S. Yashiro, and
M. L. Kaiser
On behalf of the Scientific Organizing Committee, we cordially invite you to participate in The International Living with a Star (ILWS) workshop to be held in Goa, India during February 19-24, 2006. The focus of the workshop will be on how the variable Sun influences the heliosphere around it and how the solar system objects respond. How Earth responds is of immediate concern to all nations of the world because of the increasing dependence on technology such as satellite communications. The ILWS workshop in Goa will bring an international focus to the solar-heliospheric and space weather issues and pave the way for increased collaboration among scientists. A major focus will be on various boundaries in the heliosphere. The workshop will consist of tutorial lectures, invited papers, and contributed papers (oral and posters). Apart from the tutorial talks and a few selected plenary talks, all the papers will be presented in the working group sessions. One important aspect of the ILWS workshop is that full papers should be submitted before the workshop (8 pages for invited papers and 4 pages for contributed papers). The workshop deliberations will take place on the following broad topics:
Sun and the Heliosphere: Solar Interior-Surface; Solar Surface-Heliosphere; Solar Eruptions (CMEs and flares); Irradiance effects; Long-term change; Transient-Heliospheric effects; SEP production and transport; Cosmic rays in the heliosphere; Heliosphere-Magnetosphere
Magnetosphere: Magnetopause; Sub-storms; Radiation belts; M-I coupling; Storms/sub-storms
Ionosphere Thermosphere Mesosphere: High latitude; Mid latitude; Low latitude; Local microphysics; ITM-atmosphere; Ozone depletion.
Contributed papers are welcome on any of the topics above. Papers on Theory-Modeling, Data analysis, and Instrumentation related to the above topics are welcome. Abstract deadline: December 15, 2005, full paper due: February 5, 2006. Details on the workshop venue, hotel accommodation, registration (online), request for financial assistance, and abstract submission can be found at the following site:
Nat Gopalswamy and Archana Bhattacharya (SOC Co-chairs)
SOC: P. Venkatakrishnan (India), R. Sridharan (India), Arnab Rai Chaudhuri (India), S. M. Chitre (India), G. S. Lakhina (India), A. Bhattacharya (co-chair India), M. Guhathakurta (USA), N. Gopalswamy (co-chair USA), D. Sibeck(USA), R. Robinson (USA), K. Groves (USA), W. Liu (Canada), L. Zelenyi (Russia), K. Yumoto (Japan), H. Opgenoorth (ESA), M. Zhang (China), J. N. Goswami (India), O. C. St. Cyr (USA), C. Z. Frank Cheng (Taiwan)
The SOHO/LASCO CME catalog contains a list of all CMEs manually identified since 1996 from the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO) mission. This catalog has been updated recently, with the following additional features:
1) New parameters such as mass and kinetic energy are included in the catalog
2) LASCO data gaps exceeding 3 hours are now listed.
3) The catalog is now searchable from the VSO site and from the Solarsoft site.
4) The search results include an "Event Summary" of the CMEs (image of first appearance, GOES soft X-ray plot, CME-height-time plot, and a summary of the basic attributes).
5) For IDL users: the catalog may also be searched by the SolarSoft routine ssw_getcme_list.pro; SSW users may use that function directly for application development and to access this CME catalog within an SSW session.
A detailed description of the catalog can be found at http://cdaw.gsfc.nasa.gov/CME_list/catalog_description.htm
The CDAW Data Center is funded by NASA LWS program.
Comment on "Coronal mass ejections, interplanetary ejecta and geomagnetic
storms?" by H. V. Cane, I. G. Richardson, and O. C. St. Cyr
N. Gopalswamy, N., P. K. Manoharan, P. K., and S. Yashiro
Fast coronal mass ejections (CMEs), X-class flares, Solar energetic particles, and interplanetary shocks - were fully observed during the recent solar eruptions in October-November 2003. The CMEs arrived at Earth with shocks and produced huge geomagnetic storms. Intense aurora, substantial enhancements of the Earth's radiation belts and high fluxes of escape velocity flows from the ionosphere to the magnetosphere were observed. The multiple magnetic storm sequences revealed interesting behaviors illuminating the processes behind the injection of plasmasheet materials into the inner magnetosphere and the subsequent ring current and then ionospheric responses. Papers on all aspects of these solar eruptions, such as their solar origin, interplanetary propagation, and geospace impact will be presented during the "late breaking session".
Conveners: Nat Gopalswamy and Robert Wimmer-Schweingruber
Details: http://www.agu.org/cgi-bin/sessionsfm03?meeting=fm03&sec=SM
http://www.gsfc.nasa.gov/topstory/2003/1120sun_flip.html
http://www.journals.uchicago.edu/ApJ/journal/issues/ApJL/v598n1/17770/17770.html
http://www.gsfc.nasa.gov/news-release/releases/2003/03-97.htm
http://www.universetoday.com/am/publish/sun_flips_its_field.html
http://www.spaceref.com/news/viewpr.html?pid=13064
http://news.bbc.co.uk/1/hi/sci/tech/3226844.stm
http://www.spaceref.com/news/viewpr.html?pid=13071
http://www.spacedaily.com/news/solarscience-03zn.html
http://www.vigyanprasar.com/news/snewshtmlversion.asp?arcdate=n211103.txt
http://www.innovations-report.com/html/reports/physics_astronomy/report-23520.html
http://babblogue.com/blog/
http://spaceflightnow.com/news/n0311/19sunflip/
http://www.brightsurf.com/news/nov_03/ESA_news_112003.php
http://www.esa.int/export/esaCP/SEM1V5XLDMD_FeatureWeek_2.html
http://www.abc.net.au/science/news/space/SpaceRepublish_997019.htm
http://education.guardian.co.uk/higher/research/story/0,9865,1093848,00.html
http://www.physlink.com/News/111903SolarOutbursts.cfm
http://news.astronet.pl/news.cgi?3690
http://www.nature.com/nsu/031117/031117-9.html
http://www.eurekalert.org/pub_releases/2003-11/esa-fos111903.php
http://www.innovations-report.com/html/reports/physics_astronomy/report-23520.html
http://www.sciencemag.org/cgi/content/full/302/5650/1490b
http://www.kompas.com/teknologi/news/0311/24/233931.htm
http://news.bbc.co.uk/hi/spanish/science/newsid_3228000/3228142.stm
http://es.news.yahoo.com/031125/8/33bdg.html
http://www.physics4u.gr/news/2003/scnews1175.html
http://bric.postech.ac.kr/trend/science/2003/03_11now/031124c.html
http://www.eurekalert.org/pub_releases/2003-11/esa-fos111903.php
http://education.guardian.co.uk/higher/research/story/0,9865,1093848,00.html
http://www.crumbtrail.org/mt/archives/000137.html
http://www.syzygyjob.net/phenomena/messages/45892.shtml
http://209.157.64.200/focus/f-news/1025845/posts
http://polaris.astroenlazador.com/Polaris-n47.pdf
Coronal Mass Ejection Activity During Solar Cycle 23
N. Gopalswamy, A. Lara, S. Yashiro, S. Nunes, and R. A. Howard
Coronal and Interplanetary Environment of Large Solar Energetic Particle Events
Nat Gopalswamy, Seiji Yashiro, Guillermo Stenborg, and Russell Howard
Solar and geospace connections of energetic particle events
N. Gopalswamy
Large solar energetic particle events of cycle 23:
A global view
N. Gopalswamy, S. Yashiro, A. Lara, M. L. Kaiser, B. J. Thompson,
P. T. Gallagher, and R. A. Howard
A Statistical Study of CMEs Associated with Metric Type II bursts
A. Lara, N. Gopalswamy, S. Nunes, G. Munoz, and S. Yashiro
Long-duration hectometric type III radio bursts and their association with solar energetic particle (SEP) events
R. J. MacDowall, A. Lara, P. K. Manoharan, N. V. Nitta, A. M. Rosas, J. L. Bougeret
On Coronal Streamer Changes
N. Gopalswamy, M. Shimojo, W. Lu, S. Yashiro, K. Shibasaki, and R. A. Howard
Properties of Narrow Coronal Mass Ejections Observed with LASCO
S. Yashiro, N. Gopalswamy, G. Michalek, and R. A. Howard
SHINE workshops are the premier venue for lively scientific exchange between solar and heliospheric physicists. SHINE workshops are sponsored by NSF, but participation is community-wide. This year the workshop will be held on the beautiful Hawaiian island of Maui at the Outrigger Wailea (http://www.outrigger.com). The main workshop will be held on July 7-11. The first-ever SHINE student day workshop will be held on Sunday, July 6.
TOPIC FOR THE WORKSHOP INCLUDE: Vector Magnetic Fields and Surface Flows: What do they tell us about CME Initiation? CME/Flare Initiation and Energetic Particles Where do Shock Waves form in the Corona? How Should we Interpret Suprathermal Particle Signatures? Coronal and Heliospheric Magnetic Field Models The First Ever SHINE Coordinated Campaign Event Studies
Working group leaders are David Alexander (Lockheed), Nick Arge (U. of Col./CIRES & NOAA/SEC), Christina Cohen (Caltech), Todd Hoeksema (NASA HQ), Tom Holzer (HAO) and Mark Popecki (U of NH).
TO REGISTER, GO TO THE SHINE WEB PAGE (http://www.shinegroup.org). Click on "Meetings" then click on "Registration for the SHINE 2003 Workshop." For hotel reservations, contact the hotel (now also called the Wailea Marriott) directly at their toll free number 1-800-292-4532 (or at 808-874-8176) or by email. Mention that you belong to the SHINE group to get the discounted rate of $150/night.
STUDENT PARTICIPATION IS ENCOURAGED! FINANCIAL AID IS AVAILABLE. If you are a student and need financial aid to attend the workshop, send email to Nat Gopalswamy indicating the level of support needed (airfare, hotel, meals, registration fee). Request for partial support will be honored first. A recommendation letter from the research supervisor is required.
SHINE Steering Committee: Jon Linker (SAIC), Chair; Nat Gopalswamy, (NASA/GSFC), Workshop Co/rdinator; Joan Burkepile (HAO), Jim Klimchuk (NRL), Sara Martin (Helio Res.), Pete Riley (SAIC), Allan Tylka (NRL), Dave Webb (BC), and Thomas Zurbuchen (U. of Mich.). SHINE Student Leaders: David Foster (HAO), Susan Lepri (U. of Mich.)
Effect of CME Interactions on the Production of
Solar Energetic Particles
N. Gopalswamy, S. Yashiro, G. Michalek, M. L. Kaiser, R. A. Howard,
R. Leske, T. von Rosenvinge, and D. V. Reames
Large solar energetic particle events of cycle 23:
A global view
N. Gopalswamy, S. Yashiro, A. Lara, M. L. Kaiser, B. J. Thompson,
P. T. Gallagher, and R. A. Howard
A Statistical Study of CMEs Associated with Metric Type II bursts
A. Lara, N. Gopalswamy, S. Nunes, G. Munoz, and S. Yashiro
Prominence Eruptions and Coronal Mass Ejection: A Statistical Study
using Microwave Observations
A New Method for Estimating Widths, Velocities, and
Source Location of Halo CMEs
Interacting Coronal Mass Ejections and Solar Energetic Particles
Coronal Mass Ejections: Initiation and Detection
Relation between CMEs and ICMEs
Statistical Properties of Radio-rich Coronal Mass Ejections
Coronal Mass Ejections and Their Geospace Consequences
Journal of Geophysical Research - Space Physics - has just published
the special section on solar eruptive events (Vol. 106, No. A11, November 1, 2001). The issue
also contains several related papers.
The whole issue can be purchased directly from AGU for $20.
Interplanetary radio emission due to interaction
between two coronal mass ejections
SPACE WEATHER STUDY USING COMBINED CORONAGRAPHIC AND IN SITU
OBSERVATIONS
Introduction to special section: Global picture of solar eruptive events
Near-Sun and near-Earth manifestations of solar eruptions
X-ray Ejecta, White Light CMEs and a Coronal Shock Wave
Characteristics of coronal mass ejections associated with long
wavelength type II radio bursts
Predicting the 1-AU Arrival Times of Coronal Mass Ejections
SOLAR ERUPTIONS AND LONG WAVELENGTH RADIO BURSTS: THE 1997 MAY 12 EVENT
The Center for Solar Physics and Space Weather (CSPSW) announces the
availability of an online catalog of CME measurements. The catalog is
developed using the SOHO
data in cooperation with the Naval
Research Laboratory and the Solar Data Analysis Center
(SDAC) at the Goddard Space
Flight Center. The entries start From January 1996 (immediately
after the launch of SOHO). The catalog is complete up to December 2000
and will be current soon. There are about 3000 CMEs in the catalog.
The catalog contains a list of all CMEs identified by LASCO operators, and a few
additional ones identified during our measurements. In addition, it
contains a number of measurements that characterize the CMEs: Date and
time of first appearance in the C2 coronagraph field of view, central
position angle, angular width (twice the cone-angle), speed from
linear fit to the height-time measurements, speed at the last height
of measurement using quadratic fit, speed at 20 Ro using quadratic
fit, acceleration obtained from the quadratic fit, and the actual
position angle at which the height-time measurements are made. Links
are also provided to the daily mpeg movies created by the Naval
Research Laboratory using C2 and C3 coronagraph images and the
Extreme-ultraviolet Imaging Telescope (EIT) images at 195 A. Each CME
is identified by the date and time of occurrence. Here are some
additional features of the catalog:
1. By clicking on the date, one can view javascript movies of the CMEs
within the C2 field of view, with the EIT 195 images superposed so
that the solar source of the CME could be identified.
The catalog resides at the CSPSW's CDAW Data Center ( http://cdaw.gsfc.nasa.gov),
supported by NASA. The catalog will undergo frequent updates, so
please check the web site frequently. Java-script movies may not be
available for all dates at the moment.
We started this project initially to study the relation between
interplanetary type II radio bursts observed by the Wind/WAVES and
then extended to all CMEs. We hope this catalog will be useful to the
scientific community in enhancing scientific return from US Space
missions.
Sample measurements were made by two post-doctoral fellows, Drs
S. Yashiro and G. Michalek to check for consistency. The measurements
were within 10% error. We also consulted several CME researchers in
developing this catalog: Drs. R. Howard (NRL), O. C. St. Cyr
(CSPSW/NRL/GSFC), S. P. Plunkett (NRL), N. Rich (NRL) and G Lawrence
(CSPSW).
We encourage everyone to use the catalog and send us comments and
suggestions so we can improve and refine the catalog. We would be
delighted to participate in collaborative projects that use the
catalog. Please keep us informed about your projects that use the
catalog so we can avoid conflicts.
We suggest that users of the catalog acknowledge the catalog to the
effect of the following:
"This CME catalog is generated and maintained by the Center for Solar
Physics and Space Weather, The Catholic University of America in
cooperation with the Naval Research Laboratory and NASA. SOHO is a
project of international cooperation between ESA and NASA."
Sincerely,
March 6-9 2000
February 29 2000
January 25 2000
December 29 1999
December 10-15 1999
N. Gopalswamy, M. Shimojo, W. Lu, S. Yashiro, K. Shibasaki,
G. Michalek, N. Gopalswamy, and S. Yashiro
May 9, 2002
N. Gopalswamy, S. Yashiro, G. Michalek,
N. Gopalswamy
N. Gopalswamy
N. Gopalswamy, S. Yashiro, G. Michalek,
N. Gopalswamy
November 7, 2001
October 4, 2001
Nat Gopalswamy, Seiji Yashiro, Michael L. Kaiser,
Russell A. Howard, and J.-L. Bougeret
N. Gopalswamy
August 31, 2001
N. Gopalswamy
N. Gopalswamy, A. Lara, M. L. Kaiser, and J.-L. Bougeret
N. Gopalswamy, O. C. St. Cyr, M. L. Kaiser, and S. Yashiro
N. Gopalswamy, S. Yashiro, M. L. Kaiser, R. A. Howard, and J.-L. Bougeret
N. Gopalswamy, A. Lara, S. Yashiro, M. L. Kaiser, and R. A. Howard
N. Gopalswamy and M. L. Kaiser
August 29, 2001
2. By clicking on the time, one can view the actual height-time
measurements.
3. By clicking on the linear speed, one can view the height-time plot
(in gif format); by clicking on the second order speed, one can view
the quadratic fit.
N. Gopalswamy
S. Yashiro
G. Michalek
April 27, 2001
A special section in JGR space Physics is getting ready to be
published sometime this summer. About 20 papers on solar eruptive
events based on the international
conference and the 1999 ISTP/IACG workshop
will appear in the special section. One can purchase a single issue
of JGR-Space Physics containing the special section for $20 (non
members of AGU: $40). To get an idea of the contents of the special
section, Please see the introduction to the
special section.
You may contact the AGU directly to
purchase the issue.
April 2, 2001
NASA
NASA
NASA GSFC
CUA
Science News
Scientific American Explore
Yahoo
CNN
MSNBC
SpaceFlig(tNow.com
SPACE.COM
spacescience.com
Paper in Astrophysical Journal (pdf)
Abstract of a Related Paper (ADS)
March 22 2000
Center for Solar
Physics and Space Weather, The Catholic University of America, Washington DC 20064, USA.
Contact: Nat Gopalswamy
a
GSFC
National Resource Award "for their tireless dedication in the development
and
innovative
implementation of the Solar Eruptive Events Coordinated Data Analysis Workshop."
Last Modification: December 31, 1999