amp

Logical Entity Name | amp
Default Table Name | amp
Definition | Summary information on an amplitude reading

amp Attributes

Attribute/Logical Rolename | Domain | Datatype | NULL | Definition
ampid |  | NUMERIC(15, 0) | NO | Amplitude identification. Each amplitude is assigned a unique positive integer identifying it. This number is used in the AssocAmO relation along with the origin identifier to link Amp and Origin. This number is used also in the AssocAmM relation along with the magnitude identifier to link Amp and Netmag
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
datetime |  | NUMERIC(25, 10) | YES | The date of associated with information in the record, in true epoch format * In the current real time system, we know the exact amplitude time as well as the window. Therefore, we can set values for the datetime, wstart & duration fields. * In the case where we know only the time of the amplitude but not the window, we set: datetime = [AMPLITUDE TIME] wstart = [AMPLITUDE TIME] duration = 0 * In the case where we do not know the amplitude time nor the window, we set: datetime = NULL wstart = [ORIGIN TIME] duration = NULL
sta |  | VARCHAR(6) | NO | Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used
net |  | VARCHAR(8) | YES | Unique network identifier. This character string is the name of a seismic network
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
channel |  | VARCHAR(8) | YES | Channel name
channelsrc |  | VARCHAR(8) | YES | Domain for channel. This specifies what naming convention is used for the channel name (i.e. SEED, USGS, etc.)
seedchan |  | VARCHAR(3) | YES | SEED channel name. The first character denotes the band code, the second for the instrument code and the third represents the component code
location |  | VARCHAR(2) | YES | Describes the individual sites on an array station, operated by the same network operator
iphase |  | VARCHAR(8) | YES | Reported phase. This eight-character field holds the name initially given to a seismic phase. Standard seismological labels for the types of signals (or phases) are used (e.g., P, PKP, PcP, pP). Both upper and lower case letters are available and should be used when appropriate, for example, pP or PcP
amplitude |  | DOUBLE PRECISION | NO | Amplitude in appropriate units for type
amptype |  | VARCHAR(8) | YES | Amplitude type
units |  | VARCHAR(4) | NO | Units of amplitude
ampmeas |  | VARCHAR(1) | YES | Amplitude measure
eramp |  | NUMERIC(5, 3) | YES | Uncertainty in amplitude measurement
flagamp |  | VARCHAR(4) | YES | This attribute is a flag to indicate whether amplitude is over P packet, S packet, entire waveform, etc
per |  | NUMERIC(10, 4) | YES | Signal period. This attribute is the period of the signal described by the amplitude record
snr |  | DOUBLE PRECISION | YES | Signal-to-noise ratio. This is an estimate of the signal relative to that of the noise immediately preceding it
tau |  | NUMERIC(9, 4) | YES | Coda duration (F-P time)
quality |  | NUMERIC(2, 1) | YES | This attribute describes the completeness of the time window of data. A complete time window is 1.0, an incomplete time window is 0.0. If an incomplete time window has been human-reviewed and the analyst is confident that the peak amplitude was recorded and properly computed despite the presence of data gaps, the value is set to 0.5 to indicate the window contains data gaps, but is usable
rflag |  | VARCHAR(2) | YES | This flag describes whether an observation was generated automatically, by a human, or has been finalized
cflag |  | VARCHAR(2) | YES | This flag indicates whether the amplitude value is below noise, on scale or clipped
wstart |  | DOUBLE PRECISION | NO | Start of time window of amplitude measurement * In the current real time system, we know the exact amplitude time as well as the window. Therefore, we can set values for the datetime, wstart & duration fields. * In the case where we know only the time of the amplitude but not the window, we set: datetime = [AMPLITUDE TIME] wstart = [AMPLITUDE TIME] duration = 0 * In the case where we do not know the amplitude time nor the window, we set: datetime = NULL wstart = [ORIGIN TIME] duration = NULL
duration |  | DOUBLE PRECISION | YES | Duration of amplitude reading * In the current real time system, we know the exact amplitude time as well as the window. Therefore, we can set values for the datetime, wstart & duration fields. * In the case where we know only the time of the amplitude but not the window, we set: datetime = [AMPLITUDE TIME] wstart = [AMPLITUDE TIME] duration = 0 * In the case where we do not know the amplitude time nor the window, we set: datetime = NULL wstart = [ORIGIN TIME] duration = NULL
lddate |  | DATE | YES | Load date. Date and time that the record was created, in Oracle date datatype

amp Keys

Key Name | Key Type | Keys
ampkey01 | PrimaryKey | ampid

amp Relationships

Parent Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Supertype
remark | Non-Specific |  |  |  |  |  | NO

Child Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Subtype
ampset | Identifying | One To Zero or More |  |  |  |  | NO
assocamm | Identifying | One To Zero or More |  |  |  |  | NO
assocamo | Identifying | One To Zero or More |  |  |  |  | NO

amp Check Constraints

Check Constraint Name | CheckConstraint
amp01 | ampid > 0
amp02 | amplitude > 0
amp03 | ampmeas in ('0','1')
amp04 | amptype in ('C','WA','WAS','WASF','PGA','PGV','PGD','WAC','WAU','IV2','SP.3','SP1.0','SP3.0','ML100','ME100','EGY')
amp06 | eramp >= 0.0
amp07 | flagamp in ('P','S','R','PP','ALL','SUR')
amp08 | per > 0.0
amp09 | tau > 0.0
amp10 | units in ('c','s','mm','cm','m','ms','mss','cms','cmss','mms','mmss','mc','nm','e','cmcms','none')
amp11 | quality >= 0.0 and quality <= 1.0
amp12 | rflag in ('a','h','f','A','H','F')
amp13 | cflag in ('bn', 'os','cl','BN','OS','CL')