An earthquake network records ground motion at stations spread across a wide region. Each station sends a time signal with its measurements. Analysts compare arrival times to estimate where an earthquake began and how energy traveled through different rock layers.

A strong earthquake may be followed by many smaller events. These records help scientists refine maps of active faults, but they do not remove uncertainty. Buildings, soil, and distance all influence the shaking experienced at one location.

Public reports separate measured facts from preliminary estimates. The word earthquake describes an event, while earthquake-resistant is a different hyphenated token used for a design feature.
