CISN label
CGS | USGS | Caltech | CalEMA | UCB

Products and Services

Rapid Reporting | ShakeMaps | Software | EEW Project
Engineering Archives | Seismological Archives
Stations | Outreach | Documents

One of the primary products of the CISN is reliable monitoring and continuous reporting of all signification earthquake activity in California. Quick links to earthquake information are available; here we describe some of these products more fully. The CISN distributes notification of earthquakes electronically through the Web and through other means.

Rapid earthquake reporting

The CISN distributes information about earthquakes through several methods. Maps of recent earthquake activity in California and Nevada are available through multiple Web servers. The main Web server is provided by the USGS and is mirrored in several locations. Several alternate sources are available and should provide identical information. In some cases, if computers or routers are down, the information may be out of sync. Both the maps and lists of earthquakes cover the last week of seismicity.

A recent pilot project shows "old" earthquakes in a format similar to the "recent" earthquakes:

Notification about earthquakes in California is now available by email. Follow the links below to sign up, depending on your area of interest:

The CISN has recently released CISN Display V1.0 as a tool for integrating earthquake information in emergency response. CISN Display is an integrated Web enabled earthquake notification system, designed for emergency management 24/7 operations centers. The application provides users with maps of real-time seismicity, and automatically provides access to Web-related earthquake products such as ShakeMaps. CISN Display also offers an open source GIS mapping tool that allows users to plot freely available layers of public highways, roads and bridges, as well as private layers of organizational-specific infrastructure and facilities information.

CISN Display is designed to provide earthquake information for emergency response. First-responders, organizations with critical lifelines and infrastructure, and emergency responders are invited to register for an account.

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For earthquakes of M3.5 and higher, the CISN produces maps depicting the intensity of ground shaking. These maps are based on shaking parameters from stations in the combined seismographic networks, supplemented with predicted ground motions in areas where limited data are available, and are distributed electronically within minutes of the occurrence of the earthquake. Maps are updated as additional data becomes available.

At the present time, different and multiple Web sites provide access to the CISN ShakeMaps in northern and southern California. We hope to simplify this interface in the future.

Northern California Southern California Statewide
Current NC ShakeMap Current SC ShakeMap Current CGS Statewide Shakemap

Other sources of ShakeMaps include:

For more information on ShakeMaps and what they mean, please see

ShakeMaps can be used by public and private agencies to facilitate their earthquake response. ShakeCast is a prototype software package for the rapid distribution of ShakeMaps to critical users. In addition to delivering ShakeMaps, the software allows users to define locations of interest and set shaking levels to trigger automatic notification, provide electronic ntofication of events and projected intensity levels, and integrate with in-house GIS systems.

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The CISN and the ANSS are collaborating on the development of software to distribute earthquake information. Two examples are currently available. CISN Display is an application that rapidly receives earthquake information distributed by seismic networks operating in the United States via the Internet. The software package was designed primarily for emergency management 24/7 operations centers. ShakeCast is a software tool for the rapid distribution of ShakeMaps. In addition to delivering the ShakeMaps, the software allows users to define locations of interest and establish shaking levels to trigger automatic notification.

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Strong motion records of engineering interest

Reports of strong ground motion records (e.g., Quick Reports) are produced rapidly for significant earthquakes to facilitate engineering use of the data. These reports may also include data from structures, response spectra, and other relevant information. Super datasets of strong motion records from all the institutions will be produced for online, public access.

The CISN Engineering Data Center is under development, but a prototype is available for use:

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Seismological data for all recorded earthquakes

Ground motion records from all CISN networks, including strong motion stations are analyzed and archived to facilitate seismological use of the data. Each management center has its own archive and the CISN is working to improve and enhance the interface between them.

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Seismic instrumentation

The CISN partners operate a diverse collection of seismic instrumentation, with the goal of recording both large and small earthquakes. In addition to instrumentation designed to record ground motions, the CISN is involved in structural monitoring.

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Outreach and technology transfer for education, mitigation and emergency response

Training in the uses of seismological information for disaster reduction will be provided to emergency responders, contingency planners, public information media representatives and others. CISN will also provide a unified, simple means of access to all the data in all CISN-sponsored databases.


The CISN has written a strategic plan and published a number of reports on the progress toward their goals. These documents and others are available on the Web:

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California Integrated Seismic Network

CGS USGS OES Caltech UC Berkeley