Relating to or occurring at an epicenter, especially concerning earthquakes and their surface effects; central or focal in importance.
From 'epicenter' + Latin suffix '-al' (relating to). Developed as a technical adjective in seismology during the late 19th and early 20th centuries for precise description of earthquake phenomena.
When geologists talk about 'epicentral damage' versus damage further away, they're describing how earthquake waves spread outward in patterns—understanding this distinction helped scientists develop better building codes in earthquake zones.
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