# Rotational Ground Motion Parameters Catalog – General Description

Ground Motion Parameters Catalog contains data from the Seismic catalog and Rotational Ground Motion Catalog through the event ID. That data format can be made using the application Ground Motion Parameters Catalog builder user guide.

The 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 the Rotational Ground Motion Parameters Catalog is prepared in the same manner as the Catalog of seismic events, Ground Motion Catalog, and Ground Motion Parameters Catalog.

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

**field**– name of field in the catalog (text value);**type**– type of field in the 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 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 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. In the fields describing the events ("EID", "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 rotation values in all rows must be present.

Field | Type | Val | unit | description | FieldType | Comments | Data format |
---|---|---|---|---|---|---|---|

| 3 | data vector | Event ID |
| text | ||

| 5 | data vector | Event origin time |
| double | ||

| 14,15,24,25 | data vector | deg | Latitude |
| double | |

| 14,15,24,25,34,35 | data vector | deg | Longitude |
| double | |

| 11-13 | data vector | km | Hypocenter depth measured from the ground level | Hypocenter depth counted downwards from surface (positive values below surface) | double | |

| 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 | |

| 4 | data vector | Moment magnitude | 'Magnitude' | required field from Seismic Catalog when any other Magnitude is unavailable | double | |

| 4 | data vector | Local magnitude | 'Magnitude' | required field from Seismic Catalog when any other Magnitude is unavailable | double | |

| 3 | data vector | Registration ID |
| text | ||

| 3 | data vector | Station ID | required field | text | ||

| 3 | data vector | Station name | required field | text | ||

| 24,25 | data vector | deg | Station latitude | required field | double | |

| 24,25,34,35 | data vector | deg | Station longitude | required field | double | |

| 10 | data vector | m | Station elevation | required field | double | |

Epicentral_dist | 22 | data vector | km | 'Epicentral distance between event and station' | required field | ||

| 5 | data vector | days | Registration occurrence time |
| double | |

| 13 | data vector | rad/s | Peak ground rotational velocity of E component | PRV | required field | double |

| 13 | data vector | rad/s | Peak ground rotational velocity of N component | PRV |
| double |

| 13 | data vector | rad/s | Peak vertical ground rotational velocity | PRV |
| double |

PRV_H | 13 | data vector | rad/s | Peak horizontal ground rotational velocity | PRV | double | |

PRV | 13 | data vector | rad/s | Total peak ground rotational velocity | PRV | double | |

| 13 | data vector | m/s^2 | Peak ground acceleration of E component | PGA | double | |

| 13 | data vector | m/s^2 | Peak ground acceleration of N component | PGA | double | |

| 13 | data vector | m/s^2 | Total peak ground acceleration | PGA | double | |

| 13 | data vector | m/s^2 | Peak vertical acceleration | PGA | double | |

| 13 | data vector | m/s^2 | Peak horizontal acceleration | PGA | double |

**Table 1. The general parameters in catalog MAT format.**

**Except for the general parameters described in the table above, the Rotational Ground Motion Parameters Catalog can contain other parameters in accordance with the Seismic Catalog, the Ground Motion Catalog or the Ground Motion Parameters Catalog.**

**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”