Free oscillation creates a hum that can be detected anywhere on land by seismometers -- equipment used to detect and record vibrations. NASA releases new images of Earth at night 8 photos ...

K. E. Bullen, R. A. W. Haddon, Derivation of an Earth Model from Free Oscillation Data, Proceedings of the National Academy of Sciences of the United States of ...

Bullen and Haddon1,2 have derived a density model for the Earth (model HB1) which is designed to accord with the observed free oscillation data. Their solution is based on Jeffreys's α and β (P ...

The free oscillations of the model are found by considering small-amplitude perturbations to the solar model.

The first report of free oscillations was from hand–digitized analogue recordings of the 9.0+ magnitude Chilean earthquake on 22 May 1960. The seismic records from the 1960’s events were fragmentary, ...

THE oscillations induced in the principal modes of vibration of a star by a free oscillation in one of them, generally of the second order in the corresponding free amplitude, are unimportant ...

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 299, No. 1457 (Jun. 14, 1967), pp. 173-187 (15 pages) Hide (1966) has suggested that the slow westward ...

When a major earthquake occurs, the entire earth vibrates like a ringing bell. These extremely slow "free oscillations" yield information on the structure of the earth's crust and mantle ...

In addition to the 5-minute oscillations, much longer-period oscillations were predicted to exist in stars more than 40 years ago, but had not been identified on the Sun until now.

What is Madden Julien Oscillation? Here's why it's important when forecasting the tropics By Elyse Smith, via Wednesday, August 23, 2023 ...