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