Ambient noise station-correlation spectra for USArray stations

BOZ-US secondary stations.

C14A-TA D13A-TA D14A-TA D15A-TA E13A-TA E14A-TA E15A-TA F12A-TA F13A-TA F14A-TA
F15A-TA G13A-TA G14A-TA G15A-TA H12A-TA H13A-TA
EGMT-US