D McCormack, La Jolla CTBT Infrasound 28 Oct 2003

GINA – An Update

David A McCormack & Jim Blinkhorn

Nuclear Explosion Monitoring

Geological Survey of Canada

D McCormack, La Jolla CTBT Infrasound 28 Oct 2003

Recap

The Global Infrasound Archive (GINA) is an initiative to provide a freely-available academic resource comprising event-based infrasound data provided by station operators.

D McCormack, La Jolla CTBT Infrasound 28 Oct 2003

Summary

Global Infrasound Archive (GINA) Data Requesting is now available for testing at:

http://www.seismo.nrcan.gc.ca/nwfa/gina/index_e.php

It is populated mostly with events from the CD issued after the Kona workshop, with the CSS files repaired, corrected and standardized. Filenames are changed to use a common convention.

D McCormack, La Jolla CTBT Infrasound 28 Oct 2003

Output Options

Data is stored internally as CSS3.0 but converted on-the-fly per user choice to:

•CSS 3.0 •GSE 2.0: uncompressed integer • integer format: each channel trace is saved as a text file comprising a short header and a list of integer sample values •SAC •info: information for each trace taken from the CSS 3.0 wfdisc file along with information about the event. •jpeg / png image: traces as a PNG or JPEG image

D McCormack, La Jolla CTBT Infrasound 28 Oct 2003

Feedback

Please play with it, try to break it, and send feedback to:

gina@seismo.nrcan.gc.ca

or come and criticize it in person at the Fall AGU Union Session…..

WE NEED YOUR COMMENTS!