Catalog – General Description

The catalogue is a variable in the Matlab format file and it is kept in a file MAT. The structure is array with named fields that can contain data of various types and sizes. In the file there is only one variable, the file name and variable name are optional.

The variable describing the catalogue is a vector of structures, consisting of fields:

field – name of field in the catalogue (text value);
type – type of field in the catalogue and way of showing the field (numeric value); the numbers description is shown below
val – column array of For the text the column is an array type cell with text fields. For the remaining value the column is a numeric column.
unit – description of unit for individual data (text value).
description – short description of the parameter (text value).
fieldType – semantic meaning of the field. When some field values are similar/related then fieldType name is entered and for another case is entered.

Table The general parameters in catalogue MAT format

field	type	val	unit	description	fieldType	Comments	Data format
ID	3	data vector		Event ID		required field	text
*Time*	5	data vector		Event origin time		required field, Matlab serial numerical time	double
*Lat*	14,15,24,25	data vector	deg	Latitude		deg – North positive	double
*Long*	14,15,24,25,34,35	data vector	deg	Longitude		deg – East positive	double
*Depth*	11-13	data vector	km	Hypocenter depth measured from the ground level		Hypocenter depth counted downwards from surface (positive values below surface)	double
*Elevation*	13	data vector	km	Hypocenter elevation measured over the sea level		Hypocenter elevation counted upwards from sea level (positive values above sea level, negative values below sea level)	double
X	10	data vector	m, km	X coordinate		Original coordinates if other than geographical. Description of coordinates in the metadata	double
Y	10	data vector	m, km	Y coordinate			double
Z	10	data vector	m, km	Z coordinate			double
*EPI_err*	10	data vector	M	Epicentral error			double
*Depth_err*	10	data vector	m	Depth error			double
Nl	2	data vector		No of stations used in the localisation			double
M0	222	data vector	Nm	Scalar moment			double
Mw	4	data vector		Moment magnitude	'Magnitude'		double 0.1[1]
ML	4	data vector		Local magnitude	'Magnitude'		double 0.1
*Ns_decomp*	2	data vector		No of stations used in MT inversion			double
*DecompMethod*	3	data vector	char	Method used to decompose moment tensor			text
*MTrr*	222	data vector	Nm	Full solution: Moment tensor rr component (r - up)			double
*MTss*	222	data vector	Nm	Full solution: Moment tensor ss component (s - South)			double
*MTee*	222	data vector	Nm	Full solution: Moment tensor ee component (e - East)			double
*MTrs*	222	data vector	Nm	Full solution: Moment tensor rs component			double
*MTre*	222	data vector	Nm	Full solution: Moment tensor re component			double
*MTse*	222	data vector	Nm	Full solution: Moment tensor se component			double
*MT_err*	222	data vector	Nm	Full solution: Moment tensor error			double
*ISO*	120	data vector	%	Isotropic MT component		% - positive or negative	double
*CLVD*	120	data vector	%	CLVD component		% - positive or negative	double
DC	20	data vector	%	Double-Couple component		% - only positive	double
*StrikeA*	30	data vector	deg	Strike of nodal plane A		The values range from 0 to 360	double
*DipA*	20	data vector	deg	Dip of nodal plane A		The values range from 0 to 90	double
*RakeA*	130	data vector	deg	Rake of nodal plane A		The values range from -180 to 180	double
*SlopeA*	20	data vector	deg	Inclination for nodal plane A		The values range from 0 to 90	double
*StrikeB*	30	data vector	deg	Strike of nodal plane B		The values range from 0 to 360	double
*DipB*	20	data vector	deg	Dip of nodal plane B		The values range from 0 to 90	double
*RakeB*	130	data vector	deg	Rake of nodal plane B		The values range from ‑180 to 180	double
*SlopeB*	20	data vector	deg	Inclination for nodal plane B		The values range from 0 to 90	double
*Strike_err*	10	data vector	deg	Strike error			double
*Dip_err*	10	data vector	deg	Dip error			double
*Rake_err*	10	data vector	deg	Rake error			double
*Slope_err*	10	data vector	deg	Inclination error			double
*Plunge_T*	10	data vector	deg	Plunge of T-axis		The values range from 0 to 360	double
*PlungeT_err*	10	data vector	deg	T-axis plunge error			double
*Trend_T*	10	data vector	deg	Trend of T-axis		The values range from 0 to 90	double
*TrendT_err*	10	data vector	deg	T-axis trend error			double
*Plunge_P*	10	data vector	deg	Plunge of P-axis		The values range from 0 to 360	double
*PlungeP_err*	10	data vector	deg	P-axis plunge error			double
*Trend_P*	10	data vector	deg	Trend of P-axis		The values range from 0 to 90	double
*TrendP_err*	10	data vector	deg	P-axis trend error			double
*DCrr*	222	data vector	Nm	Double-Couple solution: Moment tensor rr component (r - up)			double
*DCss*	222	data vector	Nm	Double-Couple solution: Moment tensor ss component (s - South)			double
*DCee*	222	data vector	Nm	Double-Couple solution: Moment tensor ee component (e - East)			double
*DCrs*	222	data vector	Nm	Double-Couple solution: Moment tensor rs component			double
*DCre*	222	data vector	Nm	Double-Couple solution: Moment tensor re component			double
*DCse*	222	data vector	Nm	Double-Couple solution: Moment tensor se component			double
*DC_err*	222	data vector	Nm	Double-Couple solution: Moment tensor error			double
*DCStrikeA*	30	data vector	deg	Double-Couple solution: Strike of nodal plane A		The values range from 0 to 360	double
*DCDipA*	20	data vector	deg	Double-Couple solution: Dip of nodal plane A		The values range from 0 to 90	double
*DCRakeA*	130	data vector	deg	Double-Couple solution: Rake of nodal plane A		The values range from -180 to 180	double
*DCStrikeB*	20	data vector	deg	Double-Couple solution: Strike of nodal plane B		The values range from 0 to 90	double
*DCDipB*	30	data vector	deg	Double-Couple solution: Dip of nodal plane B		The values range from 0 to 360	double
*DCRakeB*	20	data vector	deg	Double-Couple solution: Rake of nodal plane B		The values range from 0 to 90	double
*DCStrike_err*	10	data vector	deg	Double-Couple solution: Strike error			double
*DCDip_err*	10	data vector	deg	Double-Couple solution: Dip error			double
*DCRake_err*	10	data vector	deg	Double-Couple solution: Rake error			double
*DCPlunge_T*	10	data vector	deg	Double-Couple solution: Plunge of T-axis		The values range from 0 to 90	double
*DCPlungeT_err*	10	data vector	deg	Double-Couple solution: T-axis plunge error			double
*DCTrend_T*	10	data vector	deg	Double-Couple solution: Trend of T-axis		The values range from 0 to 360	double
*DCTrendT_err*	10	data vector	deg	Double-Couple solution: T-axis trend error			double
*DCPlunge_P*	10	data vector	deg	Double-Couple solution: Plunge of P-axis		The values range from 0 to 90	double
*DCPlungeP_err*	10	data vector	deg	Double-Couple solution: P-axis plunge error			double
*DCTrend_P*	10	data vector	deg	Double-Couple solution: Trend of P-axis		The values range from 0 to 360	double
*DCTrendP_err*	10	data vector	deg	Double-Couple solution: P-axis trend error			double
*TNrr*	222	data vector	Nm	TN solution: Moment tensor rr component (r - up)			double
*TNss*	222	data vector	Nm	TN solution: Moment tensor ss component (s - South)			double
*TNee*	222	data vector	Nm	TN solution: Moment tensor ee component (e - East)			double
*TNrs*	222	data vector	Nm	TN solution: Moment tensor rs component			double
*TNre*	222	data vector	Nm	TN solution: Moment tensor re component			double
*TNse*	222	data vector	Nm	TN solution: Moment tensor se component			double
*TN_err*	222	data vector	Nm	TN solution: Moment tensor error			double
*TNStrikeA*	30	data vector	deg	TN solution: Strike of nodal plane A		The value range from 0 to 360	double
*TNDipA*	20	data vector	deg	TN solution: Dip of nodal plane A		The value range from 0 to 90	double
*TNRakeA*	130	data vector	deg	TN solution: Rake of nodal plane A		The value range from -180 to 180	double
*TNStrikeB*	20	data vector	deg	TN solution: Strike of nodal plane B		The value range from 0 to 90	double
*TNDipB*	30	data vector	deg	TN solution: Dip of nodal plane B		The value range from 0 to 360	double
*TNRakeB*	20	data vector	deg	TN solution: Rake of nodal plane B		The value range from 0 to 90	double
*TNStrike_err*	10	data vector	deg	TN solution: Strike error			double
*TNDip_err*	10	data vector	deg	TN solution: Dip error			double
*TNRake_err*	10	data vector	deg	TN solution: Rake error			double
*TNPlunge_T*	20	data vector	deg	TN solution: Plunge of T-axis		The value range from 0 to 90	double
*TNPlungeT_err*	10	data vector	deg	TN solution: T-axis plunge error			double
*TNTrend_T*	30	data vector	deg	TN solution: Trend of T-axis		The value range from 0 to 360	double
*TNTrendT_err*	10	data vector	deg	TN solution: T-axis trend error			double
*TNPlunge_P*	20	data vector	deg	TN solution: Plunge of P-axis		The value range from 0 to 90	double
*TNPlungeP_err*	10	data vector	deg	TN solution: P-axis plunge error			double
*TNTrend_P*	30	data vector	deg	TN solution: Trend of P-axis		The value range from 0 to 360	double
*TNTrendP_err*	10	data vector	deg	TN solution: P-axis trend error			double
*NsP*	2	data vector		No of stations used in the P-wave spectral analysis			double
E	222	data vector	J	Total seismic energy			double
*E_err*	222	data vector	J	Total seismic energy error			double
Ep	222	data vector	J	P-wave energy			double
*Ep_err*	222	data vector	J	P-wave energy error			double
fp	12	data vector	Hz	P-wave corner frequency			double
*fp_err*	12	data vector	Hz	P-wave corner frequency error			double
*rad_eff_P*	12	data vector		Radiation efficiency P			double
Qp	10	data vector		Quality factor Pwaves			double
*NsS*	2	data vector		No of stations used in the S-wave spectral analysis			double
Es	222	data vector	J	S-wave energy			double
*Es_err*	222	data vector	J	S-wave energy error J			double
fs	12	data vector	Hz	S-wave corner frequency Hz			double
*fs_err*	12	data vector	Hz	S-wave corner frequency error Hz			double
Qs	10	data vector		Quality factor Swaves			double
*rad_eff_S*	12	data vector		Radiation efficiency S			double
R	10	data vector	m	Source radius			double
*R_err*	10	data vector	m	Source radius error			double
*R_model*	3	data vector	char	Source radius model used (Brune, Madariaga, Sato&Hirasawa)			text
*rad_eff*	12	data vector		Radiation efficiency			double
*sigma_a*	13	data vector	MPa	Apparent stress			double
*delta_sigma*	13	data vector	MPa	Static stress drop			double
*sigma_d*	13	data vector	MPa	Dynamic stress drop			double
*sigma_rms*	13	data vector	MPa	RMS dynamic stress drop			double
vr	10	data vector	m/s	Rupture velocity			double
*vr_model*	3	data vector	char	Rupture velocity model (unilateral etc.)			text
*SW_eff*	12	data vector		Savage-Wood efficiency			double
u	12	data vector	m	Fault slip			double
*RMS_time_residual*	13	data vector	sec	Time residual after location in a 3D model			double
*Hypocenter_quality_index*	2	data vector		Average number of station, azimuthal coverage, stability of location against noise		Apart from the regular parameters used to select best earthquake location, including min RMS values, max recording stations, max phase numbers and gap values, we further used for lacq catalogue the following criteria as derived from 3D inversion of hypocenters using REL3D code (e.g. Guyoton et al GRL1992, Roecker JGR1982, Boyer 1996). 3 quality levels are used for the Lacq seismicity hypocenters quality level 1: -conditioning value <100 Specifically , the conditioning value threshold aims to remove ill-conditioned matrix patterns. - max location error (e.g. Tarantola Valette 1982) as estimated for 3D velocity model solutions <1 km - last iteration step for convergence before location completed < 0.5 km quality level 2: - conditioning value <100 quality level 3: - all selected events (in the lacq case study it correspond to Nmin=6 stations and a residual variance <0.2 s) Reference: Boyer, E. (1996). Sismicité induite et production pétrolière. Mémoire de diplôme d’ingénieur, Université Joseph Fourier - Grenoble I. Guyoton F, J.R.Grasso, and P.Volant,Interrelation between induced seismic instabilities and complex geological structure Geophys. Res. Lett., 19, 705-708, 1992. Roecker, S., Velocity structure of the Pamir-Hindu Kush region: Possible evidence for subjected crust, JGR, 87, 945-959, 1982 Tarantola, A., & Valette, B. (1982). Generalized nonlinear inverse problems solved using the least squares criterion. Reviews of Geophysics, 20(2), 219-232.	double
*Comments*	3		char	Particularities of the respective event (main shock, aftershock etc. ) and parameter estimation issues/uncertainties description			text
*M0_p*	222	data vector	Nm	P-wave scalar moment			double
*M0_s*	222	data vector	Nm	S-wave scalar moment			double
*M0_Dev_p*	222	data vector	Nm	P-wave scalar moment error			double
*M0_Dev_s*	222	data vector	Nm	S-wave scalar moment error			double
*M0_Dev*	222	data vector	Nm	Scalar moment error			double
P	222	data vector	m^3	Seismic potency			double
*X-relErr*	4	data vector	m	Relative error in X coordintate			double
*Y-relErr*	4	data vector	m	Relative error in Y coordintate			double
*Z-relErr*	4	data vector	m	Relative error in Z coordintate			double
*ML-rel*	4	data vector		Relative magnitude calibrated with local magnitude of larger event in the sequence	'Magnitude'		double
*NCCP*	2	data vector		Number of cross-correlated P-wave data			double
*NCCS*	2	data vector		Number of cross-correlated S-wave data			double
*NCTP*	2	data vector		Number of catalog P-wave data			double
*NCTS*	2	data vector		Number of catalog S-wave data			double
*RMSCC*	13	data vector		RMS residual for CC-derived differential arrivals			double
*RMSCT*	13	data vector		RMS residual for catolog-derived differential arrivals			double
*CID*	2	data vector		Cluster ID			double
*usedStationLocation*	3	data vector		Name of stations from which data was used for localization computation			text
*unusedStationLocation*	3	data vector		Name of stations from which data was not used for localization computation			text

The Numbers of Data type:

1 – the real data without limits,

2 – the integer data,

3 – text value,

4 – the real number rounded to 0.1 (shown as 11),

5 – time in Matlab format serial time – the time display format; seconds with accuracy 1/10,

6 – the real data display in an engineering manner with one decimal place, e.g.: 3.5E6, (obsolete, recommended 2cd)

7 – the real data display in an engineering manner with two decimal place, (obsolete, recommended 2cd)

bc – (b and c are code digits) the real data display in fix-point manner with at minimum b places before decimal and c decimal place

e.g. For number 3.149.

10: „3”

11: „3.1”

12: „3.15”

20: „03”

23: „03.149”

1bc– the same manner as bc, but with place for a sign (space for sign „+”, sign - for sign „-”)

2cd– (c and d are code digits), the real data is displayed in an engineering manner, with place for a sign (space for sign „+”, sign ‘-’ for sign „-”), with c decimal place and exponent expressed by d places. The sign in exponent is always displayed.

e.g. For number 0.001:

211: „1.0E-3”

221: „1.00E-3”

212: „1.0E-03”

222: „1.00E-03”

e.g. For number 1000:

211: „1.0E+3”

221: „1.00E+3”

212: „1.0E+03”

222: „1.00E+03”

Examples catalogs

Bobrek Catalog

field	type	val	unit	description	fieldType
ID	3	data vector		Event ID
*Time*	5	data vector		Event occurrence time
*Lat*	25	data vector	deg	Latitude
*Long*	25	data vector	deg	Longitude
*Depth*	13	data vector	km	Hypocenter depth measured from the ground level
*Elevation*	13	data vector	km	Hypocenter elevation measured over the see level
X	10	data vector	m	X coordinate
Y	10	data vector	m	Y coordinate
Z	10	data vector	m	Z coordinate
ML	4	data vector		Local magnitude	'Magnitude'
E	222	data vector	J	Total seismic energy

LGCD Catalog

field	type	val	unit	description	fieldType
ID	3	data vector		Event ID
*Time*	5	data vector		Event occurrence time
*Lat*	24	data vector	deg	Latitude
*Long*	24	data vector	deg	Longitude
*Depth*	13	data vector	km	Hypocenter depth measured from the ground level
*Elevation*	13	data vector	km	Hypocenter elevation measured over the see level
M0	222	data vector	Nm	Scalar moment
Mw	4	data vector		Moment magnitude	'Magnitude'
*MTrr*	222	data vector	Nm	Full solution: Moment tensor rr component (r – up)
*MTss*	222	data vector	Nm	Full solution: Moment tensor ss component (s – South)
*MTee*	222	data vector	Nm	Full solution: Moment tensor ee component (e – East)
*MTrs*	222	data vector	Nm	Full solution: Moment tensor rs component
*MTre*	222	data vector	Nm	Full solution: Moment tensor re component
*MTse*	222	data vector	Nm	Full solution: Moment tensor se component
*MT_err*	222	data vector	Nm	Full solution: Moment tensor error
*ISO*	120	data vector	%	Isotropic MT component
*CLVD*	120	data vector	%	CLVD component
DC	20	data vector	%	Double-Couple component
*StrikeA*	30	data vector	deg	Strike of nodal plane A
*DipA*	20	data vector	deg	Dip of nodal plane A
*RakeA*	130	data vector	deg	Rake of nodal plane A
*SlopeA*	20	data vector	deg	Inclination for nodal plane A
*StrikeB*	30	data vector	deg	Strike of nodal plane B
*DipB*	20	data vector	deg	Dip of nodal plane B
*RakeB*	130	data vector	deg	Rake of nodal plane B
fp	12	data vector	Hz	P-wave corner frequency
fs	12	data vector	Hz	S-wave corner frequency Hz

Song Tranh Catalog

field	type	val	unit	description	fieldType
ID	3	data vector		Event ID
*Time*	5	data vector		Event occurrence time
*Lat*	24	data vector	deg	Latitude
*Long*	24	data vector	deg	Longitude
*Depth*	13	data vector	km	Hypocenter depth measured from the ground level
*Elevation*	13	data vector	km	Hypocenter elevation measured over the see level
M0	222	data vector	Nm	Scalar moment
Mw	4	data vector		Moment magnitude	'Magnitude'
ML	4	data vector		Local magnitude	'Magnitude'
*MTrr*	222	data vector	Nm	Full solution: Moment tensor rr component (r – up)
*MTss*	222	data vector	Nm	Full solution: Moment tensor ss component (s – South)
*MTee*	222	data vector	Nm	Full solution: Moment tensor ee component (e – East)
*MTrs*	222	data vector	Nm	Full solution: Moment tensor rs component
*MTre*	222	data vector	Nm	Full solution: Moment tensor re component
*MTse*	222	data vector	Nm	Full solution: Moment tensor se component
*MT_err*	222	data vector	Nm	Full solution: Moment tensor error
*ISO*	120	data vector	%	Isotropic MT component
*CLVD*	120	data vector	%	CLVD component
DC	20	data vector	%	Double-Couple component
*StrikeA*	30	data vector	deg	Strike of nodal plane A
*DipA*	20	data vector	deg	Dip of nodal plane A
*RakeA*	130	data vector	deg	Rake of nodal plane A
*SlopeA*	20	data vector	deg	Inclination for nodal plane A
*StrikeB*	30	data vector	deg	Strike of nodal plane B
*DipB*	20	data vector	deg	Dip of nodal plane B
*RakeB*	130	data vector	deg	Rake of nodal plane B
fp	12	data vector	Hz	P-wave corner frequency
fs	12	data vector	Hz	S-wave corner frequency Hz

[1] The values rounded to 0.1.

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Catalog - description

Catalog – General Description

Examples catalogs

Bobrek Catalog

LGCD Catalog

Song Tranh Catalog