Internet-Site for European Strong-Motion Data

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 Ł wazi < 359 cannot be missing	I3
Local intensity I_s I_def	I_s WINT	local intensity		I Ł I_s Ł XII missing value is blank	A5
	I_def WIDF	acronym of the intensity scale on which the epicentral intensity has been determined		missing value is blank, cannot be missing, if I_o 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 Ł wnch Ł 3 cannot be missing	I1
Corrected peak acceleration A_{c_max} A_{c_t}	A_{c_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	3×F8.3
	A_{c_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	3×F8.3
Corrected peak velocity V_max V_t	V_max 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	3×F8.3
	V_t 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	3×F8.3
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	3×A15
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	3×A15
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	3×A15
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.