| evid |
| Base Entity | event |
| Attribute Name | evid |
| Logical Rolename | evid |
| ColumnName | evid |
| RoleName | evid |
| Definition | Event identifier. Each event is assigned a unique integer which identifies it in a database. It is possible for several records in the Origin relation to have the same evid. This indicates there are several opinions about the location of the event. The evid does not have to be identical to the local network’s event identifier, which is stored in the Origin table. This allows merging data for a single event from multiple sources without insisting that database evid is identical to the source’s local event identifier |
| Note | Range: evid > 0 |
| prefor |
| Base Entity | event |
| Attribute Name | orid |
| Logical Rolename | orid |
| ColumnName | prefor |
| RoleName | prefor |
| Definition | Preferred origin. This attribute holds the origin identifier, orid, that points to the preferred origin for a seismic event |
| Note | Range: prefor > 0 |
| prefmag |
| Base Entity | event |
| Attribute Name | magid |
| Logical Rolename | magid |
| ColumnName | prefmag |
| RoleName | prefmag |
| Definition | Preferred magnitude. This attribute holds the magnitude identifier, magid, that points to the preferred magnitude for a seismic event or an origin |
| Note | Range: prefmag > 0 |
| prefmec |
| Base Entity | event |
| Attribute Name | mecid |
| Logical Rolename | mecid |
| ColumnName | prefmec |
| RoleName | prefmec |
| Definition | Preferred mechanism. This attribute holds the mechanism identifier, mecid, that points to the preferred mechanism for a seismic event or an origin |
| Note | Range: prefmec > 0 |
| commid |
| Base Entity | event |
| Attribute Name | commid |
| Logical Rolename | commid |
| ColumnName | commid |
| RoleName | commid |
| Definition | Comment identification. This is a key used to point to free-form comments entered in the Remark relation. These comments store additional information about a tuple in another relation. Within the Remark relation, there may be many tuples with the same commid and different lineno, but the same commid will appear in only one other tuple among the rest of the relations in the database |
| Note | Range: commid > 0 |
| auth |
| Base Entity | event |
| Attribute Name | auth |
| Logical Rolename | auth |
| ColumnName | auth |
| RoleName | auth |
| Definition | The auth field specifies the source of the information. This may be a network identifier (FDSN or otherwise), or any other string indicating the source of the information in the record |
| Note | Range: Any free-format string up to 15 characters |
| subsource |
| Base Entity | event |
| Attribute Name | subsource |
| Logical Rolename | subsource |
| ColumnName | subsource |
| RoleName | subsource |
| Definition | A second identifier to specify the system or process that derived the data. e.g., the origin's AUTH is CI, but the subsource (the solution) was computed by JIGGLE |
| Note | Range: Any free-format string up to 8 characters |
| etype |
| Base Entity | event |
| Attribute Name | etype |
| Logical Rolename | etype |
| ColumnName | etype |
| RoleName | etype |
| Definition | This attribute is used to identify the type of seismic event, when known |
| Note | Range: etype = {le | re | ts | qb | nt | uk | sn | st} le = local event re = regional event ts = teleseism qb = quarry blast nt = nuclear test uk = unknown event sn = sonic blast st = subnet trigger |
| selectflag |
| Base Entity | event |
| Attribute Name | selectflag |
| Logical Rolename | selectflag |
| ColumnName | selectflag |
| RoleName | selectflag |
| Definition | This flag describes the “definitive” definition of an event. Helps to differentiate which event to use from two different real-time systems |
| Note | Range: rflag = {0 | 1} 0 = false 1 = true |
| lddate |
| Base Entity | event |
| Attribute Name | lddate |
| Logical Rolename | lddate |
| ColumnName | lddate |
| RoleName | lddate |
| Definition | Load date. Date and time that the record was created or last modified, in Oracle date datatype |
| Note | Range: Any valid date between January 01, 4712 BC and January 01, 4712 AD Units: YYYY/MM/DD HH24:MI:SS |
| version |
| Base Entity | event |
| Attribute Name | version |
| Logical Rolename | version |
| ColumnName | version |
| RoleName | version |
| Definition | Event version number. This attribute is incremented each time the preferred origin, magnitude or mechanism of the event is updated |
| Note | Range: version >= 0 |