Seismic noise

A tool to evaluate the quality of the signals received from each of the seismic stations is the spectral analysis of the ambient noise. This can be done by calculating the spectral power and its probability density function of the recorded continuous seismic data, (Ambient Noise Probability Density Functions).

This analysis is presented, carried out according to the technique of Mcnamara and Buland (2004), in which seismic noise records are analyzed continuously and automatically, in half-hour temporary windows, for each of the channels of the seismic stations of the National Geographic Institute. In each of the graphs, the maximum (HNM) and minimum (LNM) admissible noise curves defined by Peterson (1993) have been superimposed.

Results are automatically updated, cumulatively, once a day.

References:

  • McNamara, D.E. y R.P. Buland (2004). Ambient Noise Levels in the Continental United States, Bull. Seism. Soc. Am., 94, 1517-1527.
  • Peterson, J. (1993). Observation and modeling of seismic background noise, U.S. Geol. Surv. Tech. Rept., 93-322, 1-95.
Station Noise graph
CADE
CALD
CARI
CAVE
CBLA
CBOL
CBRE
CCAL
CCAN
CCHO
CCUM
CDIE
CDLV
CDOS
CENR
CFOR
CFTV
CFUE
CGAR
CGIN
CGOR
CGRA
CGUI
CINF
CJED
CJUL
CLAJ
CLGU
CLUM
CMCL
CMIR
CNAO
CNOR
CPIT
CPUN
CPVI
CRAJ
CREA
CROM
CTAB
CTAC
CTAN
CTEN
CTFS
CTIG
CTIM
CVIL
E0802
E0901
EADA
EAGO
EALB
EALK
EARI
EBAD
EBAJ
EBEN2
EBER
ECAB
ECAL
ECAZ
ECHE
ECHI
EFAM
EGOM
EGOR
EGRO
EHIG
EIBI
EJON
ELAN
ELGU
ELOB
EMAZ
EMIJ
EMIN
EMIR
EMLI
EMOS
EMUR
ENIJ
EORO
EOSO
EPLA
EPOB
EPON
EQES
EQTA
ERTA
ESAC
ESPR
ETOB
ETOS
ETRV
EZAM
GGC
GUD
GUIA
IELO
IEPA
IUNC
IZUN
MACI
PSIM
PTAR
RETOR
TBT
TLOR
YARA
YASP
YBER
YEBES
YMUS
YNAR
YSIG
YSOS
YUND
ZVGAR