Ambient noise station-correlation spectra for USArray stations

A13A-TA secondary stations.

A10A-TA A11A-TA A12A-TA B09A-TA B10A-TA B11A-TA B12A-TA B13A-TA C10A-TA C12A-TA
C13A-TA C14A-TA D10A-TA D11A-TA D12A-TA D13A-TA D14A-TA D15A-TA E13A-TA E14A-TA
NEW-US