Evolution of long-period noise spectra at broadband stations


The station names in the table below link to pages displaying monthly background noise measurements. Some stations have multiple seismometers. These are identified by their SEED location codes, typically 00, 10, or 20. The primary (usually best) sensor is usually denoted by 00.

Recent estimates are based on real-time (RT) data. With time, these are replaced by estimates based on quality-conrolled and archived (AR) data.


Vertical

ANG-GL IS2-GL IS3-GL ISO-GL KUL-GL NUK-GL SOE-GL UMM-GL
UPN-GL


Horizontal 1 (N,1)

ANG-GL IS2-GL IS3-GL ISO-GL KUL-GL NUK-GL SOE-GL UMM-GL
UPN-GL


Horizontal 2 (E,2)

ANG-GL IS2-GL IS3-GL ISO-GL KUL-GL NUK-GL SOE-GL UMM-GL
UPN-GL