Seismic array
A seismic array is a system of linked seismometers arranged in a regular geometric pattern (cross, circle, rectangular etc.) to increase sensitivity to earthquake and explosion detection. A seismic array differs from a local network of seismic stations mainly by the techniques used for data analysis.[1] The data from a seismic array is obtained using special digital signal processing techniques such as beamforming, which suppress noises and thus enhance the signal-to-noise ratio (SNR).
The earliest seismic arrays were built in 1960s in order to improve the detection of nuclear tests.
References
- ^ Bormann, P (2012). New Manual of Seismological Observatory Practice (NMSOP-2). IASPEI. p. Chapter 9.