The San Diego County Board of Supervisors are urging the U.S. Geological Survey Tuesday to continue funding two earthquake detection stations in the region and register its support for an early warning system. The USGS has proposed cutting the Precision Geodetic Network, or Geodesy, which measures tension along the San Jacinto Fault, and the ANZA Seismic Network, which has 21 sensors along the fault zone and five stations elsewhere. Both are run by Scripps Institution of Oceanography at UC San Diego, according to the supervisors. "The loss of these critical networks would inhibit our ability to prepare and plan for major earthquakes in San Diego County," Supervisor Greg Cox wrote in a letter to his colleagues. Cox is also slated to join with Scripps Geosciences Research Professor Neal Driscoll and Scripps earthquake science specialist Luciana Astiz at Scripps Institution of Oceanography Tuesday afternoon to reiterate the call for continued earthquake detection funding in San Diego County.