Earthquake Early Warning (EEW) relies on rapid detection and transmission of ground motions from an on-going earthquake. Current EEW systems use ground motions measured by seismometers installed across California. These seismic stations are part of the California Integrated Seismic Network (CISN), a collaborative organization of state and federal government agencies as well as universities that are part of the Advanced National Seismic System (ANSS). The University of Washington hosts the Pacific Northwest Seismic Network (PNSN) , a tier one operational center of the ANSS. The PNSN is a member of the West Coast EEW consortium.

Public dissemination of and education about earthquake early warning alerts is an important aspect of an earthquake early warning system. Once a robust system is developed, earthquake early warning alerts will be distributed by all means possible – through email, applets, radio, and television, and by computer-to-computer messages for automatic control of systems like trains and production facilities. We expect that once a system is fully developed and made publicly available a range of notification options will be rapidly developed. One such system, ShakeAlert, is the USGS managed earthquake early warning system for the West Coast of the United States.

Important aspects of implementing earthquake early warning:

  1. Advanced National Seismic System
  2. Seismic instrumentation used in EEW
  3. ShakeAlert System to provide EEW information
  4. Detection and warning times
  5. Future sources of ground motion measurements
  6. Partnering with private companies and other organizations

ShakeAlert implementation projects are managed by Regional Coordinators located in each of the states in the Shake Alert System.