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Waveform Parameters

Parameter

Description

Validation

Data Type

WCODE

(primary key)

primary key of the waveform record archived in the waveform-database and associated with the records of the databank

cannot be missing

I6

WEPIK

distance from the epicentre to the recording station in km

cannot be missing

I3

WFTD

distance from the recording station to the closest point on the surface projection of the rupture, in km

missing value is -99

I3

WAZI

azimuth between the epicentre and the station in degrees east of north

0 wazi < 359

cannot be missing

I3

Local intensity

Is Idef

Is

WINT

local intensity

I Is XII

missing value is blank

A5

 

Idef

WIDF

acronym of the intensity scale on which the epicentral intensity has been determined

missing value is blank,

cannot be missing, if Io is given

A7

WSTG

time lag in s between the P-wave arrival time or trigger time and the S-wave arrival time

missing value is –9.9

F4.1

WNCH

total number of channels stored on this record

1 wnch 3

cannot be missing

I1

Corrected peak acceleration

Ac_max Ac_t

 

Ac_max

WCAMAX

WCAMAY

WCAMAZ

array with 3 elements indicating the peak acceleration derived from corrected acceleration time histories, in m/s2

cannot be missing, default value: -999.999

3F8.3

 

Ac_t

WCATMAX

WCATMAY

WCATMAZ

array with 3 elements indicating the time, in s, after the beginning of the component records, at which the peak acceleration occurred

cannot be missing, default value: -999.999

3F8.3

Corrected peak velocity

Vmax Vt

 

Vmax

WCVMAX

WCVMAY

WCVMAZ

array with 3 elements indicating the peak velocity derived from velocity time histories, in cm/s

cannot be missing, default value: -999.999

3F8.3

 

Vt

WCVTMAX

WCVTMAY

WCVTMAZ

array with 3 elements indicating the time, in s, after the beginning of the component records, at which the peak velocity occurred

cannot be missing, default value: -999.999

3F8.3

Filenames of

uncorrected time histories

(primary keys)

WRAWX

WRAWY

WRAWZ

array with 3 elements, indicating the filenames of the uncorrected time histories archived in the databank

cannot be missing

3A15

Filenames of

corrected time

histories

(primary keys)

WCORX

WCORY

WCORZ

array with 3 elements, indicating the filenames of the corrected time histories archived in the databank

cannot be missing

3A15

Filenames of

Response spectra

(primary keys)

WSPCX

WSPCY

WSPCZ

array with 3 elements, indicating the filenames of the response spectra archived in the databank

cannot be missing

3A15

WECODE

(primary key)

primary key of the associated earthquake record archived in the earthquake-database

cannot be missing

I6

WSCODE

(primary key)

primary key of the associated station record archived in the station-database

cannot be missing

I6

WREF

source of the strong-motion record

cannot be missing

A250

Notes on parameters of waveform-database:
Fault Distance
The distance or source-path has a significant influence on the near source behaviour of ground motion models, particularly for small events for which location and depth errors can be many times the source dimension. The assessment of source distance requires accurate focal and rupture locations as well as reliable station positions and knowledge of the source mechanism. For small magnitude crustal events the source distance is close to the epicentral distance. We took the source distance to be the closest distance to the surface projection of the fault rupture as proposed by Joyner and Boore (1981).
Generally there is little difference between epicentral distance and fault distance for small magnitude crustal earthquake due to its small source dimension.
Local Intensity, Is
The two character fields give the local intensity and its scale has been defined, despite of a number of problems associated with the assessment of intensity. The intensity-values have been directly adopted from the literature or from bulletins without re-assessment.

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