Contributor logos may be added to the banner by setting the
$COOPERATORS
template variable. The logo will appear
to the right of the USGS site logo.
Usage
$COOPERATORS = '<a class="cooperator" href="http://anss.org/"><img src="https://earthquake.usgs.gov/data/comcat/logos/anss.svg" alt="in cooperation with Advanced National Seismic System (ANSS)"/></a>';