magtype

Base Entity | eventprefmag
Attribute Name | magtype
Logical Rolename |
ColumnName | magtype
RoleName |
Definition | Magnitude type. This character string is used to specify the type of the magnitude measure
Note |
    Range:
    p = initial P-wave amplitude magnitude
    a = primary amplitude magnitude (Jerry Eaton's XMAG)
    b = body-wave magnitude
    e = energy magnitude
    l = local magnitude
    l1 = traditional UCB local magnitude
    l2 = network UCB local magnitude
    lg = Lg magnitude
    c = primary coda magnitude
    s = Ms - surface wave magnitude
    w = moment magnitude
    z = low gain (Z component) magnitude of Hirshorn and Lindh (1989)
    B = magnitude estimated from 14-kg Benioff's
    un = unknown magnitude type
    d = duration magnitude
    h = human assigned magnitude
    n = no magnitude
    dl = low-gain initial P-wave amplitude magnitude
    lr = reduced local magnitude

evid

Base Entity | eventprefmag
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

magid

Base Entity | eventprefmag
Attribute Name | magid
Logical Rolename |
ColumnName | magid
RoleName |
Definition | Magnitude identifier. This key is used to identify a magnitude in the Netmag relation. It is required for every magnitude
Note |
    Range:             magid > 0

lddate

Base Entity | eventprefmag
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