| evid |
| Base Entity | event |
| Attribute Name | evid |
| Logical Rolename | |
| ColumnName | evid |
| RoleName | |
| 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 | prefor |
| 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 | prefmag |
| 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 | prefmec |
| 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 | |
| ColumnName | commid |
| RoleName | |
| 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 | |
| ColumnName | auth |
| RoleName | |
| 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 | |
| ColumnName | subsource |
| RoleName | |
| 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 | |
| ColumnName | etype |
| RoleName | |
| Definition | This attribute is used to identify the type of seismic event, when known |
| Note | Range: eq = earthquake se = slow earthquake lp = long period volcanic earthquake to = tornillo wavelet tr = non-volcanic tremor vt = volcanic tremor nt = nuclear test qb = quarry blast ce = calibration ex = generic chemical blast sh = refraction/reflection survey shot sn = sonic shockwave th = thunder ve = volcanic eruption co = mine/tunnel collapse df = debris flow/avalanche av = snow/ice avalanche ls = landslide rb = rockburst rs = rockslide bc = building collapse/demolition pc = plane crash mi = meteor/comet impact st = subnet trigger uk = unknown type ot = other miscellaneous lf = low frequency su = surface event px = probable blast ne = not existing nr = not reported ae = anthropogenic event cl = collapse cc = cavity collapse ax = accidental explosion cx = controlled explosion ee = experimental explosion de = industrial explosion me = mining explosion rc = road cut bl = blasting levee ie = induced or triggered event rl = reservoir loading fi = fluid injection fe = fluid extraction cr = crash tc = train crash oc = boat crash oe = other event pe = atmospheric event sb = sonic blast an = acoustic noise al = avalanche he = hydroacoustic event iq = ice quake sl = slide |
| selectflag |
| Base Entity | event |
| Attribute Name | selectflag |
| Logical Rolename | |
| ColumnName | selectflag |
| RoleName | |
| 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 | |
| ColumnName | lddate |
| RoleName | |
| Definition | Load date. Date and time that the record was created, 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 | |
| ColumnName | version |
| RoleName | |
| 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 |