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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 see 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