Geometric Triangulation of Imaging Observations to Track CMEs Continuously Out to 1 AU (Invited)

Details Geometric Triangulation of Imaging Observations to Track CMEs Continuously Out to 1 AU (Invited) Geometric Triangulation of Imaging Observations to Track CMEs Continuously Out to 1 AU (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh43a..04l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH43A-04

Astronomy and Astrophysics

Astrophysics

[2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7924] Space Weather / Forecasting, [7959] Space Weather / Models

Scientific paper

We describe a geometric triangulation technique, based on time-elongation maps constructed from imaging observations, to track coronal mass ejections (CMEs) continuously in the heliosphere and predict their impact on the Earth. Taking advantage of stereoscopic imaging observations from STEREO, this technique can precisely determine the propagation direction and radial distance of CMEs from their birth in the corona all the way to 1 AU. The efficacy of the method is demonstrated by its application to the 2008 December 12 CME, which manifests as a magnetic cloud (MC) from in situ measurements at the Earth. The predicted arrival time and radial velocity at the Earth are well confirmed by the in situ observations around the MC. Implementation of the technique, which is expected to be a routine possibility in the future, indicates a substantial advance in CME studies as well as space weather forecasting.

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