Waveform Quality Control for the GLISN Network


The GreenLand Ice Sheet monitoring Network (GLISN) is an international cooperative effort to provide high-quality, broadband seismological data from Greenland and immediately surrounding regions. The GLISN effort also provides more limited related geophysical data where appropriate (e.g., GPS data from several sites on the Greenland Ice Sheet). The GLISN project is described further on the GLISN web site.

WQC effort for GLISN seismic data:

The Waveform Quality Center, associated with the Global CMT Project at the Lamont-Doherty Earth Observatory of Columbia University, has begun to apply to the GLISN data many of the QA/QC tools that we use for data from global seismograph networks.

Here, we provide links to the results of systematic processing of the GLISN data.

GLISN (2009/01/01 - present):

GLISN RMS noise values, monthly by station
GLISN RMS noise values, monthly ranked list

Note: The RMS values reported in the tables linked above reflect both ground noise at each site and the reported response information for the site. If the response information reported is incorrect, the noise estimates will not reflect true noise conditions at the site!

Station (mis)orientation:
GLISN orientation estimates

Scaling factors:
GLISN scaling factors

Current through:

last data processedmetadata updatedchannels
2013/06/30 2013/08/20 40 sps and lower (LH, BH)
These results do not yet include stations for which the lowest sampling rate is >40 sps. These channels will be included in future analysis.

GLISN auxiliary stations (pre-GLISN and current temporary stations):
GLISN auxiliary stations, RMS noise values, monthly by station
GLISN auxiliary stations, RMS noise values, ranked list

Meredith Nettles, Lamont-Doherty Earth Observatory, Columbia University