Data Dictionary
title: title name given to the earthquake magnitude: The magnitude of the earthquake date_time: date and time cdi: The maximum reported intensity for the event range mmi: The maximum estimated instrumental intensity for the alert: The alert level - “green”, “yellow”, “orange”, and “red” tsunami: "1" for events in oceanic regions and "0" otherwise sig: A number describing how significant the event is. Larger numbers indicate a more significant event. This value is determined on a number of factors, including: magnitude, maximum MMI, felt reports, and estimated impact net: The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event. nst: The total number of seismic stations used to determine earthquake location. dmin: Horizontal distance from the epicenter to the nearest station gap: largest azimuthal gap between azimuthally adjacent stations (in degrees). In general, the smaller this number, the more reliable is the calculated horizontal position of the earthquake. Earthquake locations in which the azimuthal gap exceeds 180 degrees typically have large location and depth uncertainties magType: The method or algorithm used to calculate the preferred magnitude for the event depth: The depth where the earthquake begins to rupture latitude / longitude: coordinate system by means of which the position or location of any place on Earth's surface can be determined and described location: location within the country continent: continent of the earthquake hit country country: affected country