From the CORGIS Dataset Project
By Ryan WhitcombEarthquake records from around the world collected from the United States Geological Survey. Important details about the earthquake such as distance, gap, magnitude, depth and significance are included to properly describe the earthquake. Additionally, data about exact geological coordinates and a relative description of the earthquake's location is included. The earthquakes collected are from the past month.
http://earthquake.usgs.gov/earthquakes/
Key  List of...  Comment  Example Value 

id  str (Text) 
A unique name for this earthquake.  "nc72666881" 
gap  float (Decimal number) 
In general, the smaller this number, the more reliable is the calculated horizontal position of the earthquake. Specifically, this means the largest azimuthal gap between azimuthally adjacent stations (in degrees). Earthquake locations in which the azimuthal gap exceeds 180 degrees typically have large location and depth uncertainties. Ranges from 0 to 180.  122.0 
magnitude  float (Decimal number) 
Earthquake magnitude is a measure of the size of an earthquake at its source. It is a logarithmic measure. At the same distance from the earthquake, the amplitude of the seismic waves from which the magnitude is determined are approximately 10 times as large during a magnitude 5 earthquake as during a magnitude 4 earthquake. The total amount of energy released by the earthquake usually goes up by a larger factor; for many commonly used magnitude types, the total energy of an average earthquake goes up by a factor of approximately 32 for each unit increase in magnitude. Typically ranges from 1 (very tiny) to 10 (incredibly powerful).  1.43 
significance  int (Integer number) 
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. Ranges from 0 to 1000.  31 
depth  float (Decimal number) 
Depth of the event in kilometers.  15.12 
distance  float (Decimal number) 
The rough distance that this earthquake occurred away from the reporting station, measured in degrees between. 1 degree is approximately 111.2 kilometers. In general, the smaller this number, the more reliable is the calculated depth of the earthquake. In general, this number is between 0.47.1.  0.1034 
location.full  str (Text) 
"13km E of Livermore, California" 

latitude  float (Decimal number) 
Decimal degrees latitude (up and down on the globe). Negative values for southern latitudes. Ranges from 90 to 90.  37.6723333 
longitude  float (Decimal number) 
Decimal degrees longitude (east and west on the globe). Negative values for western latitudes. Ranges from 180 to 180.  121.619 
name  str (Text) 
A best guess for the name of the state (or country, in some cases) that this earthquake was reported in.  "California" 
day  int (Integer number) 
27 

epoch  int (Integer number) 
A number that represents the time that this earthquake occurred. Epoch's are the number of seconds since a particular date (January 1st, 1970), and are a convenient way to store date/times.  1469593183550 
time.full  str (Text) 
"20160727 00:19:43" 

hour  int (Integer number) 
0 

minute  int (Integer number) 
19 

month  int (Integer number) 
7 

second  int (Integer number) 
43 

year  int (Integer number) 
2016 
Key  List of...  Comment  Example Value 

name  str (Text) 
A best guess for the name of the state (or country, in some cases) that this earthquake was reported in.  "California" 