netmag

Logical Entity Name | netmag
Default Table Name | netmag
Definition | Summary information on a magnitude

netmag Attributes

Attribute/Logical Rolename | Domain | Datatype | NULL | Definition
magid |  | NUMERIC(15, 0) | NO | Magnitude identifier. This key is used to identify a magnitude in the Netmag relation. It is required for every magnitude
orid |  | NUMERIC(15, 0) | NO | Origin identification. Each origin is assigned a unique positive integer which identifies it in the database. The orid is used to identify one of the many hypotheses of the actual location of the event
commid |  | NUMERIC(15, 0) | YES | 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
magnitude |  | NUMERIC(5, 2) | NO | Magnitude. This gives the magnitude value of the type indicated by magtype
magtype |  | VARCHAR(6) | NO | Magnitude type. This character string is used to specify the type of the magnitude measure
auth |  | VARCHAR(15) | NO | 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
subsource |  | VARCHAR(8) | YES | 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
magalgo |  | VARCHAR(15) | YES | This attribute represents the algorithm used to compute the magnitude
nsta |  | NUMERIC(5, 0) | YES | This quantity is the number of stations with non-zero input weights used to compute the magnitude
nobs |  | NUMERIC(5, 0) | YES | This quantity is the number of observations with non-zero input weights used to compute the magnitude
uncertainty |  | NUMERIC(5, 3) | YES | Magnitude uncertainty. Median of the absolute values of the channel magnitude residual deviations from the channel magnitude's median, the summary magnitude.
gap |  | NUMERIC(4, 1) | YES | Gap in azimuthal coverage
distance |  | NUMERIC(7, 3) | YES | Distance from the origin to the nearest station
quality |  | NUMERIC(2, 1) | YES | This attribute denotes the quality of an origin, an arrival, or a mechanism. 1.0 = good, 0.0 = bad
rflag |  | VARCHAR(2) | YES | This flag describes whether an observation was generated automatically, by a human, or has been finalized
lddate |  | DATE | YES | Load date. Date and time that the record was created, in Oracle date datatype

netmag Keys

Key Name | Key Type | Keys
magkey01 | PrimaryKey | magid

netmag Relationships

Parent Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Supertype
origin | Non-Identifying | One To Zero or More |  |  |  | orid | NO
remark | Non-Specific |  |  |  |  |  | NO

Child Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Subtype
assocamm | Identifying | One To Zero or More |  |  |  |  | NO
assoccom | Identifying | One To Zero or More |  |  |  |  | NO
eventprefmag | Non-Identifying | One To Zero or More |  |  |  |  | NO
event | Non-Identifying | One To Zero or More |  |  |  |  | NO
mec | Non-Identifying | One To Zero or More |  |  |  |  | NO
origin | Non-Identifying | One To Zero or More |  |  |  |  | NO

netmag Check Constraints

Check Constraint Name | CheckConstraint
netmag01 | magnitude >= -10.0 and magnitude <= 10.0
netmag02 | magtype in ('p', 'a','b','e','l','l1','l2','lg','c','s','w','z','B','un','d','h','n','dl')
netmag03 | nsta >= 0
netmag04 | uncertainty >= 0.0
netmag05 | quality >= 0.0 and quality <= 1.0
netmag06 | magid > 0
netmag07 | rflag in ('a','h','f','A','H','F')
netmag08 | nobs >= 0