Accoustic Imaging of the BACKSIDE of the Sun

Introduction

Images of an active region on the far side of the Sun were derived by applying seismic holography to recent helioseismic observations from space. Active regions are the centers of energetic phenomena such as solar flares and coronal mass ejections whose resulting electromagnetic and particle radiation interfere with telecommunications and power transmission on Earth and can pose significant hazards to astronauts and spacecraft. Synoptic seismic imaging of far-side solar activity will now allow us to anticipate the appearance of large active regions more than a week ahead of their arrival on the east solar limb.

Postscript and Acrobat PDF preprint versions of the paper are available

See also:

The NASA Press Release Site

The ESA Press Release

Movies and Images

The following images are clips from the movies

Waves Moving Into Farside Waves Moving Out Of Farside
Courtesy of NASA-GSFC EIT Images from Gurman
High-Res 12-Sec Dopplergrams Full Disk 1-Min Dopplergrams
Full Disk Continuum for 10 March - 15 April 1998 Full Disk Magnetograms for 10 March - 15 April 1998

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