arid

Base Entity | arrival
Attribute Name | arid
Logical Rolename | arid
ColumnName | arid
RoleName | arid
Definition | Arrival identifier. Each arrival is assigned a unique positive integer identifying it. This number is used in the AssocArO relation along with the origin identifier to link Arrival and Origin
Note | Range: arid > 0

commid

Base Entity | arrival
Attribute Name | commid
Logical Rolename | commid
ColumnName | commid
RoleName | commid
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

datetime

Base Entity | arrival
Attribute Name | datetime
Logical Rolename | datetime
ColumnName | datetime
RoleName | datetime
Definition | The date of associated with information in the record, in true epoch format
Note | Range: Any valid float. datetime = 0.0 on January 01, 1970 at 00:00:00.0000 Units: Seconds

sta

Base Entity | arrival
Attribute Name | sta
Logical Rolename | sta
ColumnName | sta
RoleName | sta
Definition | Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used
Note | Range: Any free-format string up to 6 characters

net

Base Entity | arrival
Attribute Name | net
Logical Rolename | net
ColumnName | net
RoleName | net
Definition | Unique network identifier. This character string is the name of a seismic network
Note | Range: Any free-format string up to 8 characters. If available, use the two character FDSN code for the network

auth

Base Entity | arrival
Attribute Name | auth
Logical Rolename | auth
ColumnName | auth
RoleName | auth
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 | arrival
Attribute Name | subsource
Logical Rolename | subsource
ColumnName | subsource
RoleName | subsource
Definition | A second identifier to specify a unique source within the domain specified by auth
Note | Range: Any free-format string up to 8 characters

channel

Base Entity | arrival
Attribute Name | channel
Logical Rolename | channel
ColumnName | channel
RoleName | channel
Definition | Channel name
Note | Range: Any valid channel name, which may be network-specific. Networks using SEED channel names should use the same value for channel and seedchan

channelsrc

Base Entity | arrival
Attribute Name | channelsrc
Logical Rolename | channelsrc
ColumnName | channelsrc
RoleName | channelsrc
Definition | Domain for channel. This specifies what naming convention is used for the channel name (i.e. SEED, USGS, etc.)
Note | Range: Any free-format string up to 8 characters long

seedchan

Base Entity | arrival
Attribute Name | seedchan
Logical Rolename | seedchan
ColumnName | seedchan
RoleName | seedchan
Definition | SEED channel name. The first character denotes the band code, the second for the instrument code and the third represents the component code
Note | Range: seedchan = {E | S | H | B | M | L | V | U | R} U {A | B | D | F | G | H | I | K | L | M | P | R | S | V | T | W} U {Z | N | E | A | B | C | T | R | 1 | 2 | 3 | U | V | W} Band code: Sample rate (Hz) Corner period (sec) E = extremely short period ³ 80 < 10 S = short period ³ 10 to < 80 < 10 H = high broad band ³ 80 ³ 10 B = broad band ³ 10 to < 80 ³ 10 M = mid period > 1 to < 10 L = long period ~ 1 V = very long period ~ 0.1 U = ultra long period ~ 0.01 R = extremely long period ~ 0.001 Instrument code: A = tiltmeter B = creepmeter D = pressure F = magnetometer G = gravimeter/accelerometer H = high gain seismometer I = humidity K = temperature L = low gain seismometer M = mass position seismometer P = geophone R = rainfall S = linear strainmeter V = volumetric strain T = tide meter W = wind Component code: N = north-south E = east-west T = transverse R = radial Z = vertical A, B, C = triaxial 1, 2, 3 = orthogonal components but non-traditional orientations U, V, W = optional components

location

Base Entity | arrival
Attribute Name | location
Logical Rolename | location
ColumnName | location
RoleName | location
Definition | Describes the individual sites on an array station, operated by the same network operator
Note | Range: Any free-format string up to 2 characters long

iphase

Base Entity | arrival
Attribute Name | iphase
Logical Rolename | iphase
ColumnName | iphase
RoleName | iphase
Definition | 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
Note | Range: Any free-format string up to 8 characters

qual

Base Entity | arrival
Attribute Name | qual
Logical Rolename | qual
ColumnName | qual
RoleName | qual
Definition | Onset quality. This single-character flag is used to denote the sharpness of the onset of a seismic phase. This attribute does not denote the timing accuracy
Note | Range: qual = {i | e | w} i = impulsive e = emergent w = weak

clockqual

Base Entity | arrival
Attribute Name | clockqual
Logical Rolename | clockqual
ColumnName | clockqual
RoleName | clockqual
Definition | This field describes whether the clock quality associated with a particular arrival is known, and if so, is good or bad
Note | Range: clockqual = {U | G | B} U = unknown G = good B = bad

clockcorr

Base Entity | arrival
Attribute Name | clockcorr
Logical Rolename | clockcorr
ColumnName | clockcorr
RoleName | clockcorr
Definition | This field indicates the amount of time to add to the arrival time if clock correction is known
Note | Units: Microseconds

ccset

Base Entity | arrival
Attribute Name | ccset
Logical Rolename | ccset
ColumnName | ccset
RoleName | ccset
Definition | This field describes whether the clock correction has been added or applied to the arrivals in computing a hypocenter solution
Note | Range: ccset in {0 | 1} 0 = no 1 = yes

fm

Base Entity | arrival
Attribute Name | fm
Logical Rolename | fm
ColumnName | fm
RoleName | fm
Definition | First motion. This is a two-character indication of first motion. The first character describes first motion seen on short-period channels and the second holds for long-period instruments. Compression (dilation) on a short-period sensor is denoted by c(d) and compression (dilation) on a long-period sensor is denoted by u(r). Empty character positions will be indicated by dots (e.g., ".r")
Note | Range: All two-letter permutations of (c | d | .} U {u | r | .}

ema

Base Entity | arrival
Attribute Name | ema
Logical Rolename | ema
ColumnName | ema
RoleName | ema
Definition | Emergence angle. This attribute is the emergence angle of an arrival, as observed at a three-component station or array. The value increases from the vertical direction towards the horizontal
Note | Range: 0.0 <= ema <= 90.0 Units: Degrees

azimuth

Base Entity | arrival
Attribute Name | azimuth
Logical Rolename | azimuth
ColumnName | azimuth
RoleName | azimuth
Definition | Observed azimuth. This is the estimated station-to-event azimuth measured clockwise from north
Note | Range: 0.0 <= azimuth <= 360.0 Units: Degrees

slow

Base Entity | arrival
Attribute Name | slow
Logical Rolename | slow
ColumnName | slow
RoleName | slow
Definition | Observed slowness. This is the observed slowness of a wave as it sweeps across an array
Note | Range: slow >= 0.0 Units: Seconds/kilometer

deltim

Base Entity | arrival
Attribute Name | deltim
Logical Rolename | deltim
ColumnName | deltim
RoleName | deltim
Definition | Arrival time uncertainty. This attribute gives the standard deviation of a detection time
Note | Range: deltim ³ 0.0 Units: Seconds

delinc

Base Entity | arrival
Attribute Name | delinc
Logical Rolename | delinc
ColumnName | delinc
RoleName | delinc
Definition | Uncertainty in the angle. This attribute gives the standard deviation of the angle of emergence
Note | Range: delinc ³ 0.0 Units: Degrees

delaz

Base Entity | arrival
Attribute Name | delaz
Logical Rolename | delaz
ColumnName | delaz
RoleName | delaz
Definition | Uncertainty in the azimuth. This attribute gives the standard deviation of the azimuth of a signal
Note | Range: delaz > 0.0 Units: Degrees

delslo

Base Entity | arrival
Attribute Name | delslo
Logical Rolename | delslo
ColumnName | delslo
RoleName | delslo
Definition | Uncertainty in slowness. This attribute gives the standard deviation of the slowness of a signal
Note | Range: delslo > 0.0 Units: Seconds/Kilometers

quality

Base Entity | arrival
Attribute Name | quality
Logical Rolename | quality
ColumnName | quality
RoleName | quality
Definition | This attribute denotes the quality of an origin, an arrival, or a mechanism. 1.0 = good, 0.0 = bad
Note | Range: 0.0 <= quality <= 1.0

snr

Base Entity | arrival
Attribute Name | snr
Logical Rolename | snr
ColumnName | snr
RoleName | snr
Definition | Signal-to-noise ratio. This is an estimate of the signal relative to that of the noise immediately preceding it
Note | Range: snr > 0.0

rflag

Base Entity | arrival
Attribute Name | rflag
Logical Rolename | rflag
ColumnName | rflag
RoleName | rflag
Definition | This flag describes whether an observation was generated automatically, by a human, or has been finalized
Note | Range: rflag = {A | H | F} A = automatic H = reviewed by human F = finalized

lddate

Base Entity | arrival
Attribute Name | lddate
Logical Rolename | lddate
ColumnName | lddate
RoleName | lddate
Definition | Load date. Date and time that the record was created or last modified, 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