E-Print Archive

There are 2659 abstracts currently viewable.
There is a problem with some abstracts that became corrupted following database issues. These will be restored as soon as possible.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Evolution of Anemone AR NOAA 10798 and the Related Geo-Effective Flares and CMEs View all abstracts by submitter

Ayumi Asai   Submitted: 2008-12-14 20:54

We present a detailed examination of the features of the Active Region (AR) NOAA 10798. This AR generated coronal mass ejections (CMEs) that caused a large geomagnetic storm on 24 August 2005 with the minimum Dst index of -216 nT. We examined the evolution of the AR and the features on/near the solar surface and in the interplanetary space. The AR emerged in the middle of a small coronal hole, and formed a {it sea anemone} like configuration. Hα filaments were formed in the AR, which have southward axial field. Three M-class flares were generated, and the first two that occurred on 22 August 2005 were followed by Halo-type CMEs. The speeds of the CMEs were fast, and recorded about 1200 and 2400 km s-1, respectively. The second CME was especially fast, and caught up and interacted with the first (slower) CME during their travelings toward Earth. These acted synergically to generate an interplanetary disturbance with strong southward magnetic field of about -50 nT, which was followed by the large geomagnetic storm.

Authors: Ayumi Asai, Kazunari Shibata, Takako T. Ishii, Mitsuo Oka, Ryuho Kataoka, Ken'ichi Fujiki, Nat Gopalswamy
Projects: None

Publication Status: JGR (accepted)
Last Modified: 2008-12-15 10:11
Go to main E-Print page  The Kinematics of Coronal Mass Ejections using Multiscale Methods  Predicting observational signatures of coronal heating by Alfv?n waves and nanoflares  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Solar-cycle related variation of solar differential rotation
Internal-cycle variation of solar differential rotation
The standard flare model in three dimensions III. Slip-running reconnection properties
Global axis shape of magnetic clouds deduced from the distribution of their local axis orientation
Fine-scale Structures of Flux Ropes Tracked by Erupting Material
The influence of numerical resolution on coronal density in hydrodynamic models of impulsive heating
Spectral diagnostics with the SDO EVE flare lines
A revised radiometric calibration for the Hinode/EIS instrument
Disturbances in the U.S. electric grid associated with geomagnetic activity
Origin of Macrospicule and Jet in Polar Corona by A Small-scale Kinked Flux-Tube
Spatially Resolved Microwave Observations of Multiple Periodicities in a Flaring Loop
Changes in quasi-periodic variations of solar photospheric fields: precursor to the deep solar minimum in the cycle 23?
Pathways of large-scale magnetic couplings between coronal events
Superflares on Solar-Type Stars Observed with Kepler II. Photometric Variability of Superflare-Generating Stars : A Signature of Stellar Rotation and Starspots
A Challenging Solar Eruptive Event of 18 November 2003 and the Causes of the 20 November Geomagnetic Superstorm. I. Unusual History of an Eruptive Filament
Hi-C & AIA observations of transverse MHD waves in active regions
Geometric properties of acoustic waves generated by a point source in the solar-like interior: effects of acoustic cutoff frequency
Study of Failed CME Core Associated with Asymmetric Filament Eruption
Simulation of the Observed Coronal Kink Instability and Its Implications for the SDO/AIA
Investigating Two Successive Flux Rope Eruptions In A Solar Active Region

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2003 Solar Physics Group - Montana State University