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Gravimetric Parameters Catalog contains data from from the Seismic catalog and Gravimetric catalog thru through the event ID. That data format can be made using the application Catalog builder.
The catalogue catalog is a variable in the Matlab format file and it is kept in a file MAT. The structure is an 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 format of Gravimetric of the Gravimetric Parameters Catalog is made in the same manner as catalog of seismic events and the Ground Motion Parameters Catalog.
The variable describing the catalogue catalog is a vector of structures, consisting of fields:
- field – name of field in the catalogue catalog (text value);
- type – a type of field in the catalogue catalog and way of showing the field (numeric value);
- val – column array of values. 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 the 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.
The fundamental is a full catalogue catalog i.e. the variable contains the definitions of all specified fields. When some field values are missing then for the numeric data NaN (not specified) is entered and for the text null [] is entered.
The Gravimetric Parameters Catalog contains as many fields as Seismic Catolog Catalog and Gravimetric Catalog contain plus one additional - epicentral distance. Epicentral distance is calculated based on coordinates of events and station wich stations which measured that event.
In the fields describing the events ("ID", "Time", "Lat", "Long" and at least one of Magnitude), the place of measurement ("RID", "SID", "S_name", "S_Lat", "S_Long", "S_Elevation", "R_time") and at least one of the fields of gravimetric measurements and epicentral distance values in all rows must be present.
Field | Type | Val | unit | description | FieldType | Comments | Data format |
|---|---|---|---|---|---|---|---|
EID | 3 | data vector | Event ID | required field from Seismic Catalog | text | ||
Time | 5 | data vector | Event origin time | required field from Seismic Catalog, Matlab serial numerical time | double | ||
Lat | 14,15,24,25 | data vector | deg | Latitude | required field from Seismic Catalog deg – North positive | double | |
Long | 14,15,24,25,34,35 | data vector | deg | Longitude | required field from Seismic Catalog deg – East positive | double | |
| Depth | 11-13 | data vector | km | Hypocenter depth measured from the ground level | Hypocenter depth counted downwards from the surface (positive values below the surface) | double | |
| Elevation | 13 | data vector | km | Hypocenter elevation measured over the see level | Hypocenter elevation counted upwards from sea level (positive values above sea level, negative values below sea level) | double | |
Mw | 4 | data vector | Moment magnitude | 'Magnitude' | required field from Seismic Catalog when any other Magnitude is unavailable | double | |
ML | 4 | data vector | Local magnitude | 'Magnitude' | required field from Seismic Catalog when any other Magnitude is unavailable | double | |
RID | 3 | data vector | Registration ID | required field. ID must be linked to the name of gravimetric the gravimetric record | text | ||
SID | 3 | data vector | Station ID | required field | text | ||
S_name | 3 | data vector | Station name | required field | text | ||
S_Lat | 24,25 | data vector | deg | Station latitude | required field | double | |
S_Long | 24,25,34,35 | data vector | deg | Station longitude | required field | double | |
S_Elevation | 10 | data vector | m | Station elevation | required field | double | |
R_Time | 5 | data vector | Registration occurrence time | required field | double | ||
| Epicentral_dist | 22 | data vector | km | Epicentral distance between event and station | required field | double | |
Dg | 23 | data vector | uGal | Gravity field acceleration change | required field | double | |
V | 23 | data vector | um/s | Velocity of ground motion change due to gravity (vertical component) | required field | double | |
| P | 23 | data vector | um | Position - displacement of ground due to gravity (vertical component) | required field | double |
Table 1. The general parameters in catalogue catalog MAT format.
Except for the general parameters described in the table above, the Gravimetric Parameters Catalog can contain other parameters in accordance with the Seismic Catalog, the Gravimetric Catalog, or the Ground Motion Catalog.
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