Definitions

Date - Time
Coordinated Universal Time (UTC) is used for the origin time of the earthquake.

In the United States, Canada or Mexico, to convert to your local time, find your time zone and subtract the number of hours listed.

	Standard Time	Daylight Time
Newfoundland	UTC - 3½ hours	UTC - 2½ hours
Atlantic	UTC - 4 hours	UTC - 3 hours
Eastern	UTC - 5 hours	UTC - 4 hours
Central	UTC - 6 hours	UTC - 5 hours
Mountain	UTC - 7 hours	UTC - 6 hours
Pacific	UTC - 8 hours	UTC - 7 hours
Alaska	UTC - 9 hours	UTC - 8 hours
Hawaii	UTC - 10 hours
Aleutian	UTC - 10 hours	UTC - 9 hours

Location
The latitude and longitude of the earthquake are given in decimal degrees. The latitude is the number of degrees north (N) or south (S) of the equator. The longitude is the number of degrees east (E) or west (W) of the prime meridian, which runs through Greenwich, England.

Depth
Depth is the distance below sea level in kilometers. If the depth of an event is not satisfactorily determined by the data, it is held to a default depth, and the Location Quality shows "depth fixed by location program."

Magnitude
Magnitude is a measure of the size of an earthquake or strain energy released by it, as determined by seismographic observations. More->

Region
The region name is usually an automatically-generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->

Reference
The distance and direction from a nearby geographical point to the earthquake location.

Source
The organization contributing the location.