ORIGIN
The origin tables contain information describing a
derived or reported origin for a particular event.
TABLE 64: ORIGIN 
Column Storage Type Description
1 lat float(24) estimated latitude
2 lon float(24) estimated longitude
3 depth float(24) estimated depth
4 time float(53) epoch time
5 orid number(8) origin identifier
6 evid number(8) event identifier
7 jdate number(8) Julian date
8 nass number(4) number of associated phases
9 ndef number(4) number of locating phases
10 ndp number(4) number of depth phases
11 grn number(8) geographic region number
12 srn number(8) seismic region number
13 etype varchar2(7) event type
14 depdp float(24) estimated depth from depth phases
15 dtype varchar2(1) depth method used
16 mb float(24) body wave magnitude
17 mbid number(8) mb magnitude identifier
18 ms float(24) surface wave magnitude
19 msid number(8) Ms magnitude identifier
20 ml float(24) local magnitude
21 mlid number(8) ML magnitude identifier
22 algorithm varchar2(15) location algorithm used
23 auth varchar2(15) source/originator
24 commid number(8) comment identifier
25 lddate date load date
TABLE 64: ORIGIN (CONTINUED)
Category: Core, Fundamental
Keys: Primary orid
Alternate lat/lon/depth/time
Foreign evid, mbid, msid, mlid, commid
Data: Descriptive nass, ndef, ndp, grn, srn, etype
Measurement lat, lon, depth, time, jdate, depdp, dtype, mb, mbid,
ms, msid, ml, mlid
Administrative algorithm, auth, lddate