Quake Data Distribution System (QDDS)

U.S. Geological Survey, Menlo Park, California

January 2000


The Quake Data Distribution System (QDDS) provides a method for distributing earthquake data over the Internet. It provides a more robust and simpler system than the earlier methods of phone lines and pagers. While similar to a classical client-server system, it has some important differences. We refer to it as a hub-leaf system. Hubs send event information to attached leaves. In addition to receiving information, leaves can originate information and send it to one or more hubs. These hubs then send to their leaves. The QDDS System was designed and written by Stephen Jacob from Dublin, Ireland who was an intern at the USGS Menlo Park Laboratory in the summer of 1998. The development was then picked up by Alan Jones of SUNY Binghamton.


How does it work?

Where is it running?

QDDS has been running since late 1998 at USGS Menlo Park, CalTech, University of Washington, USGS Golden, SUNY Binghamton, and, more recently, at the USGS office in Reston, Virginia.

Want to try it?

Fetch QDDS.html from ftp://clover.wr.usgs.gov/pub/QDDS/QDDS.html which describes how to set and run the system.


David Oppenheimer(oppen@usgs.gov), USGS Menlo Park
Alan Jones(jones@sunquakes.geol.binghamton.edu), SUNY Binghamton,