id: integer identifier, unique value for each record
origintime: origin-time in ISO8601 format 
latitude: latitude of hypocenter decimal degrees positive represents north latitude
longitude: longitude of hypocenter decimal degrees negative represents west longitude
depth: best estimate of hypocenter depth in kilometers
err_lon: uncertainty in earthquake longitude in kilometers if \N then it is null and not well known
err_lat: uncertainty in earthquake latitude in kilometers if \N then it is null and not well known
err_depth: uncertainty in earthquake depth in kilometers if \N then it is null and not well known
err_origintime: uncertainty in earthquake origintime in seconds if \N then it is null and not well known
county: county which contains earthquake epicenter
origin_src: source specification USGS, OGS, or OGSD for derived
m: estimated moment magnitude from weighted average of magnitudes
m_uncert: uncertainty in estimated moment magnitude
m_src: source of estimated moment magnitude
mw: moment magnitude
mw_src: source of Mw (moment) measurement if more than one then the weighted average is reported as OGSD for OGS derived
mblg_ogs: Lg surface wave magnitude measured by the OGS
mblg_usgs: Lg surface wave magnitude measured by the USGS
ml_ogs: local magnitude based on local Oklahoma Earthquakes
m3hz_ogs: magnitude of Lg wave at 3Hz
md_ogs: duration magnitude measured by the OGS
mb: body wave magnitude
ms: surface wave magnitude
mfa: magnitude based on felt area
max_mmi: maximum Modified Mercalli Intensity
mmi_src: source where maximum mmi came from 
geom: well-known binary representation of location of earthquake in WGS84 reference frame
flag: integer indicating wether earthqauke is foreshock(-1), mainshock (0) or aftershock (1)