1. REDIRECT

PAGER (Prompt Assessment of Global Earthquakes for Response) is a monitoring system for earthquakes. The service is operated by the US Geological Survey, with headquarters in Golden, Colorado.

A pager (also known as a beeper) is a wireless telecommunications device that received and displays numeric and/or receives and announces voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter. Pagers operate as part of a paging system which includes one or more fixed transmitters (or in the case of response pagers and two-way pagers, one or more base stations), as well as a number of pagers carried by mobile users. These systems can range from a restaurant system with a single low-power transmitter, to a nationwide system with thousands of high-power base stations.