Technical Comments

Comment on “Detection of Emerging Sunspot Regions in the Solar Interior”

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Science  20 Apr 2012:
Vol. 336, Issue 6079, pp. 296
DOI: 10.1126/science.1215425

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Abstract

Ilonidis et al. (Reports, 19 August 2011, p. 993) report acoustic travel-time decreases associated with emerging sunspot regions before their appearance on the solar surface. An independent analysis using helioseismic holography does not confirm these travel-time anomalies for the four regions illustrated by Ilonidis et al. This negative finding is consistent with expectations based on current emerging flux models.

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