Notification:
We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

The recording and analysis of seismic body waves using linear cross arrays

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)

Seismic signals from a single event usually contain a number of components (phases) which have travelled by different propagation paths, or with a different mode of propagation. These may be superimposed and obscure signal components of interest. Seismic background noise may also be of sufficient amplitude to obscure the signal onset, which is often of relatively small amplitude, or even obscure the whole signal. An array of seismometers, spaced over a distance comparable to the signal wavelength, can be used as a filter to separate and help identify signal components on the basis of azimuth and apparent velocity at the Earth's surface. A signal/noise ratio improvement is also obtained for the first arrival, improving the accuracy of locating the hypocentres using triangulation methods from several stations. Linear cross arrays have been operated during recent years by the United Kingdom Atomic Energy Authority and many events analysed, an example of which is shown. The theoretical performances of symmetrical cross and L-shaped arrays are given in the form of directivity patterns, and their method of use described. Correlation methods are shown to be necessary for obtaining a good azimuth or velocity response, and their advantages and limitations considered

Published in:

Radio and Electronic Engineer  (Volume:29 ,  Issue: 1 )