This document is a Web-formatted version of the IRIS Newsletter.
Content is the same but there are some formatting differences from the printed version.
For over a century, openly exchanged data has been the cornerstone of seismology. Little can be done with the recordings from a single seismic station, and elastic wave propagation does not stop at either political or institutional boundaries. The nature of our science requires openly distributed data, and global bulletins serve as both evidence for this requirement and as a symbol of international cooperation. Whether broadcast on the Internet, relayed by satellite, transmitted by modem, or mailed as tape, seismological data travel around the world each day by almost every form of transportation and in almost every medium. Unusual ground motion at one observatory triggers inquiries to other observatories.