These daystack images show daily cross correlations (blue=positive amplitude, red=negative) between a station pair over time, with the stacked cross correlation at the top. The raw data have a sample rate of 1 sample per second.

Station pair N02-N11, separated by 120 km, with an azimuth from N02 to N11 of 225 degrees.

Download a PDF of Daystack images filtered with a 10 second center period Gaussian filter here (3.3MB)

Or, unfiltered here (3.3MB)

Spectral amplitude variations over time. Each horizontal slice shows the FFT of a daylong cross correlation stack. The cumulative cross correlation function is show at the top of each image along with the interstation distance in kilometers and the azimuth from station 1 to station 2. The raw data have a sample rate of 1 sample per second.

Station pair N02-N11, separated by 120 km, with an azimuth from N02 to N11 of 225 degrees.

Download a PDF of the unfiltered daystack spectral amplitude images here (6.3MB)

Download a PDF of a summary with the daystack image, daystack spectral amplitudes, and filtered NCFs here (70.9MB)