Seismic Network Operations
|Name||Number of Stations|
|Global Seismographic Network||150|
In these pages, we provide information about the stations of the Global Seismographic Network and the ANSS backbone network, including information on station instrumentation, data channels, installation type, as well as links to plots of data, availability, telemetry status, and other parameters.
Zoom in on an area to view all stations.
LISS - Live Internet Seismic Server
What is the LISS?
The Live Internet Seismic Server (LISS) is a data transmission protocol developed at the USGS Albuquerque Seismological Laboratory. It was initially used both to acquire data from remote seismic stations as well as to distribute data to users. Today, the LISS is primarily used to distribute data. It allows for near-real-time data flow from seismic stations around the world. Data requests are not necessary; a client simply connects to a specific internet address to begin receiving data. In the event a station experiences a communications outage, the LISS automatically requests data from the station to back-fill the missing data. Today, the LISS is primarily used to distribute data to users over the Internet from Golden, CO.
What data are available via the LISS?
Data from stations of the Global Seismographic Network and the ANSS backbone network are available via the LISS. Each station will typically have at least three components of data available at multiple sampling rates. Data range from low sample rates, enabling studies of low frequency signals from large teleseisms (distant earthquakes) which travel deep within the earth's interior, to high sample rate data, often used to analyze short period signals of local earthquakes and explosions. Instrumentation varies from highly sensititive very broadband seismometers used to record distant events to low gain accelerometers able to withstand violent shaking of a large earthquake near the station.
How do I connect to the LISS?
The USGS Albuquerque Seismological Laboratory provides software to allow users to receive near real-time data from the Live Internet Seismic Server (LISS) and to manipulate that data. The programs are written in C and have been designed to be as platform-independent as possible. The software has been extensively tested on the Sun Solaris platform, and should run under most Unix/Linux operating systems. The package is free. Get the LISS Client Software and operating instructions.