Database structure

 

 

This chapter defines the physical structure of each table, as it exists within the DBMS data dictionary. The name of the relation appears in bold print at the top left and a description of the table at the top right. Bold attributes represent primary keys, italic attributes represent foreign keys, and underlined attributes stand for CSS attributes.

Event Summary information on an event

Attribute

Type

Description

evid

int

Event identifier

prefor

int

Preferred origin

prefmag

int

Preferred magnitude

prefmec

int

Preferred mechanism

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

etype

char(7)

Event type

selectflag

int

"Definitive" definition of the event

version

int

Event version number

lddate

date

Load date

Significant_Event Summary information on a significant event

Attribute

Type

Description

evid

int

Event identifier

evname

char(80)

Event name

remarks

char(2)

Event indications (felt, damage, ...)

nfelt

int

Number of felt reports

mmi

int

Maximum MM intensity

pga

float

Peak acceleration

lddate

date

Load date

 

Origin Data on event location

Attribute

Type

Description

orid

int

Origin identifier

evid

int

Event identifier

prefmag

int

Preferred magnitude

prefmec

int

Preferred mechanism

commid

int

Comment identifier

bogusflag

int

Bogus origin flag

datetime

float

Origin date

lat

float

Estimated latitude

lon

float

Estimated longitude

depth

float

Estimated depth

type

char(2)

Type of location

algorithm

char(15)

Location algorithm used

algo_assoc

char(80)

Associator algorithm used

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

datumhor

char(8)

Datum type for latitude & longitude

datumver

char(8)

Datum type for vertical

gap

float

Maximum azimuthal gap of stations

distance

float

Distance to nearest station

wrms

float

Standard error of observations

stime

float

Origin time error

erhor

float

Horizontal error

sdep

float

Depth error

erlat

float

Error in latitude

erlon

float

Error in longitude

totalarr

int

Total number of arrivals

totalamp

int

Total number of amplitude readings

ndef

int

Number of locating phases

nbs

int

Number of S readings

nbfm

int

Number of P first motions

locevid

char(12)

Local event identifier

quality

float

Quality of solution

fdepth

char

Fixed depth

fepi

char

Fixed epicenter

ftime

char

Fixed time

vmodelid

int

Velocity model identifier

cmodelid

int

Crustal model identifier

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

Origin_Error Error data on event location

Attribute

Type

Description

orid

int

Origin identifier

sxx

float

Covariance matrix element

syy

float

Covariance matrix element

szz

float

Covariance matrix element

stt

float

Covariance matrix element

sxy

float

Covariance matrix element

sxz

float

Covariance matrix element

syz

float

Covariance matrix element

stx

float

Covariance matrix element

sty

float

Covariance matrix element

stz

float

Covariance matrix element

azismall

float

Azimuth of smallest principal error

dipsmall

float

Dip of smallest principal error

magsmall

float

Magnitude of smallest principal error

aziinter

float

Azimuth of intermediate principal error

dipinter

float

Dip of intermediate principal error

maginter

float

Magnitude of intermediate principal error

azilarge

float

Azimuth of largest principal error

diplarge

float

Dip of largest principal error

maglarge

float

Magnitude of largest principal error

lddate

date

Load date

 

Netmag Summary information on a magnitude

Attribute

Type

Description

magid

int

Magnitude identifier

orid

int

Origin identifier

commid

int

Comment identifier

magnitude

float

Magnitude

magtype

char(6)

Magnitude type

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

magalgo

char(15)

Magnitude algorithm

nsta

int

Number of stations used

uncertainty

float

Magnitude uncertainty

gap

float

Maximum azimuthal gap of stations

distance

float

Minimum distance of stations

quality

float

Subjective quality

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

Arrival Summary information on a seismic arrival

Attribute

Type

Description

arid

int

Arrival identifier

commid

int

Comment identifier

datetime

float

Pick date

sta

char(6)

Station code

net

char(8)

Network identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

channel

char(3)

Channel name

channelsrc

char(8)

Domain of channel name

seedchan

char(3)

SEED channel name

location

char(2)

SEED location

iphase

char(8)

Reported phase

qual

char

Signal onset quality

clockqual

char

Clock quality

clockcorr

int

Clock correction

ccset

char

Clock correction set

fm

char(2)

First motion

ema

float

Emergence angle

azimuth

float

Observed azimuth

slow

float

Observed slowness

deltim

float

Delta time

delinc

float

Error in angle

delaz

float

Delta azimuth

delslo

float

Delta slowness

quality

float

Quality

snr

float

Signal to noise ratio

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

AssocArO Data associating arrivals with origins

Attribute

Type

Description

orid

int

Origin identifier

arid

int

Arrival identifier

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

iphase

char(8)

Associated phase

importance

float

Importance of phase

delta

float

Station to event distance

seaz

float

Station to event azimuth

in_wgt

float

Input weight

wgt

float

Output weight

timeres

float

Time residual

azres

float

Azimuth residual

emares

float

Incidence angle residual

slores

float

Slowness residual

vmodelid

int

Velocity model identifier

scorr

float

Station correction in seconds

sdelay

float

Station delay

rflag

char

Human/automatic/finalized observation

ccset

char

Clock correction set

lddate

date

Load date

 

Amp Summary information on an amplitude reading

Attribute

Type

Description

ampid

int

Amplitude identifier

commid

int

Comment identifier

datetime

float

Amplitude date

sta

char(6)

Station code

net

char(8)

Network identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

channel

char(3)

Channel name

channelsrc

char(8)

Source of channel name

seedchan

char(3)

SEED channel name

location

char(2)

SEED location

iphase

char(8)

Reported phase

amplitude

float

Amplitude

amptype

char(8)

Amplitude type

units

char(4)

Units of amplitude

ampmeas

char

Amplitude measure

eramp

float

Error in amplitude

flagamp

char(4)

Flag to indicate whether amplitude is over P packet,S packet,entire waveform.

per

float

Period

snr

float

Signal to noise ratio

tau

float

Coda duration (F-P time)

quality

float

Subjective quality

rflag

char

Human/automatic/finalized observation

cflag

char(2)

Clip flag

wstart

float

Start of time window

duration

float

Duration of amplitude reading

lddate

date

Load date

 

AssocAmO Data associating amplitudes with origins

Attribute

Type

Description

orid

int

Origin identifier

ampid

int

Amplitude identifier

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

delta

float

Station to event distance

seaz

float

Station to event azimuth

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

AssocAmM Data associating amplitudes with magnitudes

Attribute

Type

Description

magid

int

Magnitude identifier

ampid

int

Amplitude identifier

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

weight

float

Magnitude weight

in_wgt

float

Input weight

mag

float

Magnitude for this station reading

magres

float

Magnitude residual

magcorr

float

Magnitude correction for this station

importance

float

Importance of amplitude

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

Remark Comments

Attribute

Type

Description

commid

int

Comment identifier

lineno

int

Comment line number

remark

char(80)

Free format comment

lddate

date

Load date

 

Mec Summary information on a moment tensor

Attribute

Type

Description

mecid

int

Mechanism identifier

oridin

int

Origin identifier (input)

oridout

int

Origin identifier (output)

magid

int

Mw magnitude identifier

commid

int

Comment identifier

mechtype

char(2)

Mechanism/moment type

mecalgo

char(15)

Mechanism algorithm

scalar

float

Scalar moment

erscalar

float

Error in scalar moment

tft

char(8)

Time function type

tfd

float

Time function duration

mxx

float

m_xx

myy

float

m_yy

mzz

float

m_zz

mxy

float

m_xy

mxz

float

m_xz

myz

float

m_yz

smxx

float

Uncertainty in m_xx

smyy

float

Uncertainty in m_yy

smzz

float

Uncertainty in m_zz

smxy

float

Uncertainty in m_xy

smxz

float

Uncertainty in m_xz

smyz

float

Uncertainty in m_yz

srcduration

float

Source half-duration

auth

char(15)

Source/origin

subsource

char(8)

Subsystem source

strike1

int

Strike 1 of best double couple

dip1

int

Dip 1 of best double couple

rake1

int

Rake 1 of best double couple

strike2

int

Strike 2 of best double couple

dip2

int

Dip 2 of best double couple

rake2

int

Rake 2 of best double couple

unstrike1

float

Uncertainty in strike 1

undip1

float

Uncertainty in dip 1

unrake1

float

Uncertainty in rake 1

unstrike2

float

Uncertainty in strike 2

undip2

float

Uncertainty in dip 2

unrake2

float

Uncertainty in rake 2

eigenp

float

Eigen pressure

plungep

int

Plunge pressure

strikep

int

Strike pressure

eigenn

float

Eigen null

plungen

int

Plunge null

striken

int

Strike null

eigent

float

Eigen tension

plunget

int

Plunge tension

striket

int

Strike tension

nsta

int

Number of stations used in solution

pvr

int

Percent variance reduction

quality

float

Quality

pdc

int

Percent double couple

pclvd

int

Percent compensated linear vector dipole

piso

int

Percent isotropic

datetime

float

Date solution created

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

Coda Summary information on a coda

Attribute

Type

Description

coid

int

Coda identifier

commid

int

Comment identifier

sta

char(6)

Station code

net

char(8)

Network code

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

channel

char(3)

Channel name

channelsrc

char(8)

Source of channel name

seedchan

char(3)

SEED channel name

location

char(2)

SEED location

codatype

char(3)

Coda type

afix

float

Nominal coda amplitude

afree

float

Free amplitude

qfix

float

Fixed coda decay constant

qfree

float

Free decay

tau

float

Coda duration (F-P time)

nsample

int

Number of code sample windows

rms

float

Residual of mean squares for coda fit

durtype

char(3)

Duration type

iphase

char(8)

Reported phase

eramp

float

Error in amplitude

units

char(4)

Units of amplitude

time1

int

Time for pair 1

amp1

int

Amplitude for pair 1

time2

int

Time for pair 2

amp2

int

Amplitude for pair 2

time3

int

Time for pair 3

amp3

int

Amplitude for pair 3

time4

int

Time for pair 4

amp4

int

Amplitude for pair 4

time5

int

Time for pair 5

amp5

int

Amplitude for pair 5

time6

int

Time for pair 6

amp6

int

Amplitude for pair 6

quality

float

Subjective quality

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

AssocCoM Data associating codas with magnitudes

Attribute

Type

Description

magid

int

Magnitude identifier

coid

int

Coda identifier

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

weight

float

Magnitude weight

in_wgt

float

Input weight

rflag

char

Human/automatic/finalized observation

lddate

date

Load date

 

AssocCoO Data associating codas with origins

Attribute

Type

Description

orid

int

Origin identifier

coid

int

Coda identifier

commid

int

Comment identifier

auth

char(15)

Source/originator

subsource

char(8)

Subsystem source

rflag

char

Human/automatic/finalized observation

lddate

date

Load date