EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR OSCILLATIONS
The surface of the sun oscillates in certain modes defined by the
number¿of latitudinal and longitudinal modal planes. The sun vibrates
in¿multiple modes simultaneously, each mode typically having a
different¿amplitude. Observing the amplitudes of the various solar
oscillation¿modes is a way to look inside the sun. A commonly observed
phenomena is the¿"5-minute" oscillation, but other periods have been
observed from 10 to 160¿minutes on the long period scale to about 10
seconds on the short period¿scale. Also observed are so-called "g-mode"
oscillations (internal gravity¿waves) generated by turbulent convection
below the photosphere.¿These oscillations are the result of internal motions of
the sun and their study is known as helioseismology.
various sources. See Jordon, S., ed. 1981. The Sun as a Star, NASA SP-450,
NASA, Washington, D.C.