# EQ Catalog Download

The “EQ Catalog Download” widget allows users to acquire earthquake data from two Open Data APIs: USGS (United States Geological Survey) and the Chile Sismology website. This tool enables precise data extraction based on user-defined parameters such as location, time period, and minimum magnitude.

## Data Source Options

- USGS: Provides global earthquake data, including parameters like magnitude, location, and depth.

- Chile Sismology: Offers detailed seismic data specifically for Chile, ideal for regional studies.

## Configuration Parameters

The widget offers a variety of configuration options to customize the data acquisition:

- Data Source: Choose between “USGS” or “Chile Sismology”.

- Time Period:
  - Start Date: Select the starting date for the data acquisition.
  - End Date: Specify the ending date for the data acquisition. Ensure that the end date is after the start date.

- Minimum Magnitude: Define the minimum earthquake magnitude to filter events (range: 0.0 to 10.0).

### Location Options:

- By Rectangle: Define a bounding box with:
  - Min Latitude
  - Max Latitude
  - Min Longitude
  - Max Longitude

- By Circle: Provide the central coordinates (Latitude, Longitude) and the radius (Max positive Radius in km).

## Outputs

- Data: A table containing earthquake events with attributes such as magnitude, location, depth, and timestamp.

- Configuration Table: A summary of the user-defined parameters used for data acquisition.

## Usage Tips

- For precise results, adjust the magnitude and location parameters carefully.

- Utilize the “Generate” button to initiate data acquisition, and the “Reset” button to clear configurations and start anew.

- When using “Chile Sismology”, verify that the chosen coordinates are within the country’s geographical limits.