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Dynamic Variations at the Base of the Solar Convection Zone

Thompson, M. J.; Howe, R.; Hill, F. +5 more

We have detected changes in the rotation of the sun near the base of its convective envelope, including a prominent variation with a period of 1.3 years at low latitudes. Such helioseismic probing of the deep solar interior has been enabled by nearly continuous observation of its oscillation modes with two complementary experiments. Inversion of t…

Seismic Images of the Far Side of the Sun

Braun, D. C.; Lindsey, C.

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 t…