ANSS - Advanced National Seismic System
As part of its monitoring activities, the ANSS includes a national Backbone network, the National Earthquake Information Center (NEIC), the National Strong Motion Project, and 15 regional seismic networks operated by USGS and its partners.
When earthquakes strike, ANSS delivers real-time information, providing situational awareness for emergency-response personnel. In regions with sufficient seismic stations, that information includes –within minutes–a ShakeMap showing the distribution of potentially damaging ground shaking, information used to target post-earthquake response efforts. When fully implemented, ANSS will provide such dense station coverage for all at-risk urban areas. Information from ANSS is a key input to the USGS National Seismic Hazard Maps, which help communities in earthquake-prone regions develop safer building practices.
ANSS Stations
Basic station information and operation status. For technical station information, see the ANSS Station Information System (SIS).
ANSS Heliplots
Real-time seismograms from ANSS stations
ANSS Products
The ANSS data has been used to develop many real-time information products.
ANSS Seminar Series
The ANSS Seminar Series is a public forum to present, share, and promote earthquake monitoring and research activities that span the spectrum of earthquake loss reduction science.
ANSS Governance
Regional Networks
- Alaska
- California:
- Hawaii
- Intermountain West:
- Central & Eastern US:
- Pacific Northwest
- Puerto Rico
ANSS Policy & Procedures Documents
- Advanced National Seismic System—Current status, development opportunities, and priorities for 2017–27 (Circular 1429)
- Advanced National Seismic System (USGS Information Sheet, March, 2000)
- An Assessment of Seismic Monitoring in the United States: Requirements for an Advanced National Seismic System (Circular 1188)
- ANSS Management Structure Diagram
- Technical Implementation Plan
- Methods of Installing United States National Seismographic Network (USNSN) Stations–A Construction Manual
- Guideline for ANSS Monitoring of Engineered Civil Systems
- Revised Appendices D, E and F: Submission Form for Candidate Buildings, Geostructures and Infrastructure
- Instrumentation Guidelines:
- ANSS Performance Standards
- ANSS Participation Policy
- ANSS Implementation Standards & Procedures
- ANSS Equipment Policy
- ANSS Data & Products Policy
- Geodetic Networks Standards & Procedures
- EHP Portable Deployments Guidelines
- California Coordinates for West Coast Earthquake Early Warning System (CSV)
- Cascadia Coordinates for West Coast Earthquake Early Warning System (CSV)