The Advanced National Seismic System (ANSS) is a collaboration of the

United States Geological Survey The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on Mar ...

(USGS) and regional, state, and academic partners that collects and analyzes data on significant earthquakes to provide near real-time (generally within 10 to 30 minutes) information to emergency responders and officials, the news media, and the public. Such information is used to anticipate the likely severity and extent of damage, and to guide decisions on the responses needed. Data is collected by eleven regional seismic networks and the ''National Seismic Network'' ("ANSS backbone") of dedicated stations, with additional inputs from overseas seismic networks. Analysis is done at the regional data centers, and at the USGS

National Earthquake Information Center The National Earthquake Information Center (abbreviated NEIC) is part of the United States Geological Survey (USGS) located on the campus of the Colorado School of Mines in Golden, Colorado. The NEIC has three main missions: * First, the NEIC de ...

(NEIC), with the results posted at the USGS earthquake web page (https://earthquake.usgs.gov/earthquakes/). The National Strong Motion Project of the ANSS has instrumented 168 structures to record their response to very strong shaking. This data is used in research on earthquake-resistant engineering.

Products and services

The ANSS provides a range of products and services: *Earthquake detections,

location In geography, location or place is used to denote a region (point, line, or area) on Earth's surface. The term ''location'' generally implies a higher degree of certainty than ''place'', the latter often indicating an entity with an ambiguous bou ...

, depths, magnitudes, and origin times. *Earthquake source information, including

focal mechanism The focal mechanism of an earthquake describes the Fault (geology)#Slip.2C heave.2C throw, deformation in the Hypocenter, source region that generates the seismic waves. In the case of a Fault (geology), fault-related event, it refers to the ori ...

s, moment tensors, an
finite fault models
* ShakeAlert: Earthquake early warning messages in California, Oregon, and Washington. *Immediate notification of earthquakes to government and emergency managers. * '
Earthquake Notification Service (ENS)
'': customized notifications via e-mail and text messages. * ShakeMap: a map of the anticipated severity and extent of ground shaking, based on the measured strength of ground shaking and known characteristics of the affected locality. * '
ShakeCast
'': automated delivery of ShakeMaps customized for critical infrastructure, providing an estimate of shaking experienced. * '
Prompt Assessment of Global Earthquakes for Response (PAGER)
'': combines ShakeMap results with an inventory of buildings and construction types to provide an immediate estimate of * '
Did-You-Feel-It? (DYFI)
'': crowd-sourced reports of shaking that augment and interpolate instrumental data. *'
Ground Failure
'': estimations of the impacts of

landslide Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides ...

s and

liquefaction In materials science, liquefaction is a process that generates a liquid from a solid or a gas or that generates a non-liquid phase which behaves in accordance with fluid dynamics. It occurs both naturally and artificially. As an example of t ...

caused by earthquake shaking. * The ANSS '
Comprehensive Catalog (ComCat)
'' is a repository of data from the participating seismic networks. For significant earthquakes the NEIC prepares a summary of the tectonic setting, nearby fault systems, and historical seismicity. These can be accessed at the USGS Earthquake page: https://earthquake.usgs.gov/earthquakes/.

Participating regional networks

As of 2023 the following networks were participating in the ANSS:.
Alaska Earthquake Center
of the Geophysical Institute, University of Alaska Fairbanks.
California Integrated Seismic Network (CISN)
the principal units of which are networks and data centers operated by the California Institute of Technology (Caltech), the University of California (UC) Berkeley, and the USGS Earthquake Science Center at Menlo Park, which are all participants in ANSS, as well as the

California Geological Survey The California Geological Survey, previously known as the California Division of Mines and Geology, is the California state geology, geologic agency. History Although it was not until 1880 that the California State Mining Bureau, predecessor to ...

.
Center for Earthquake Research and Information
University of Memphis.
Montana Bureau of Mines and Geology

Nevada Seismological Laboratory
University of Nevada, Reno. *

Oklahoma Geological Survey The Oklahoma Geological Survey is a state agency chartered in the Constitution of Oklahoma responsible for collecting and disseminating information about Oklahoma's natural resources, geological formations, and earthquakes. Shortly after Oklahoma b ...

, University of Oklahoma. *

Pacific Northwest Seismic Network The Pacific Northwest Seismic Network, or PNSN, collects and studies ground motions from about 400 seismometers in the U.S. states of Oregon and Washington. PNSN monitors volcanic and tectonic activity, gives advice and information to the public ...

, operated by the University of Washington and University of Oregon.
Puerto Rico Seismic Network
University of Puerto Rico, Mayaguez.
South Carolina Seismic Network, University of South Carolina

Texas Seismological Network, University of Texas

University of Utah Seismograph Stations
* USGS

Hawaiian Volcano Observatory The Hawaiian Volcano Observatory (HVO) is an agency of the United States Geological Survey (USGS) and one of five volcano observatories operating under the USGS Volcano Hazards Program. Based in Hilo, Hawaii on the Island of Hawaii, the obser ...

. * USGS

. Additional stations are operated by the USGS

Albuquerque Seismological Laboratory Albuquerque ( ; ), also known as ABQ, Burque, the Duke City, and in the past 'the Q', is the most populous city in the U.S. state of New Mexico, and the county seat of Bernalillo County. Founded in 1706 as ' by Santa Fe de Nuevo México gove ...

(ASL). The regional networks are deemed authoritative for the location and magnitude of earthquakes in their region. The NEIC receives additional data from about 3,000 stations around the world, and provides backup if a regional network is unable to communicate.

Notes

Sources

* * * * * {{div col end Earthquakes Seismology Seismology measurement Seismic networks Seismological observatories, organisations and projects United States Geological Survey

Products and services

Participating regional networks

See also

Notes

Sources