Physics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jphcs.271a2011b&link_type=abstract
Journal of Physics: Conference Series, Volume 271, Issue 1, pp. 012011 (2011).
Physics
Scientific paper
Between 13th and 16th January 2005, NOA active region 10720 was the site of several large flares, one of which induced a solar quake. The expanding wave front of the quake was visible across the surface, causing both horizontal and vertical plasma displacements. Using a new temporal scanning technique for ring diagram analysis of SOHO/MDI (Michelson Doppler imager on board the Solar and Heliospheric Observatory) dopplergrams, we have calculated the horizontal and vertical velocity flows within the active region and the surrounding areas to a depth of 15Mm. We have been able to prove that it is possible to determine changes to a steadily varying subsurface flow, over time scales of hours.
Burrows Keiran
Pinter Balázs
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