منابع مشابه
Forecasting Seismic Signatures of Stellar Magnetic Activity
For the Sun, a tight correlation between various activity measures and oscillation frequencies is well documented. For other stars, we have abundant data on magnetic activity and its changes but not yet on its seismic signature. A prediction of the activity induced frequency changes in stars based on scaling the solar relations is presented. This seismic signature of the activity should be meas...
متن کاملDetection of the Lower Boundary of Stellar Convective Envelopes from Seismic Data
A sharp feature in a star's internal structure gives rise to a characteristic periodic signal in the frequencies of its global p-modes. Such a sharp feature occurs at the borders of a convective region in the star's interior. Several groups have used this characteristic signal to study the base of the solar convective envelope ((1], 2], and references therein). In this work, we apply the analys...
متن کاملDetection of seismic discontinuities
In seismic images, the opaque oscillatory nature of the ever present sedimentary layers often hide the boundaries between sedimentary packages, such as faults or river channels. Interpreters painstakingly identify these boundaries by inspecting individual planes of the image volume. Discontinuity attribute maps computed from image volumes depict these boundaries and greatly simplify and acceler...
متن کاملSeismic detection of sonic booms.
The pressure signals from a sonic boom will produce a small, but detectable, ground motion. The extensive seismic network in southern California, consisting of over 200 sites covering over 50000 square kilometers, is used to map primary and secondary sonic boom carpets. Data from the network is used to analyze three supersonic overflights in the western United States. The results are compared t...
متن کاملDetection and Analysis of Multiple Seismic
We compare several methods of analyzing short-period seismic records with the purpose of detecting multiple events. The data used were from a pair of chemical explosions at a dam site near Alma Ata, recorded at the seismic observatory at N]ould Bay, Canada. The methods evaluated include visual analysis of the arraybeam sums, multichannel matched filtering, autocorrelation analysis, and cepstral...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2001
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20010145