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
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.
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
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.
Other sources of ShakeMaps include:
- US Geological Survey
- California Geological Survey
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.
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.
- 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:
- 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.
- 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.
- 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: