Historical earthquake catalog

Example: A CSV file containing historical seismic events with location, magnitude, and date information for empirical analysis.

Step-by-step guidance

1. Dataset-level metadata

Select the following values when describing your dataset:

Risk data type: hazard
Title: “Historical earthquake catalog for [region]”
Description: Brief description of the catalog coverage period and source
Publisher: Organization maintaining the earthquake catalog
License: Appropriate license (e.g., CC-BY-4.0, public domain)

2. Resources

Add one or more resources representing your earthquake catalog files:

Format: csv, shapefile, or geopackage
Spatial resolution: Point data (enter specific precision if relevant, e.g., 0.01 degrees)
Coordinate reference system: EPSG:4326 (or appropriate CRS)

3. Hazard metadata

Under the Hazard section:

Event sets

Analysis type: historical (empirical/observed events)
Calculation method: observed
Event count: Total number of recorded earthquakes
Occurrence time start: Start date of catalog coverage
Occurrence time end: End date of catalog coverage
Occurrence time span: Time period in ISO 8601 duration format (e.g., P50Y for 50 years)

Hazards (within the event set)

Hazard type: earthquake
Processes: ground_shaking
Intensity measure: PGA:g (peak ground acceleration) or v_ects:MW (moment magnitude)

4. Spatial coverage

Define the geographic extent:

Scale: national, regional, or global
Countries: Select applicable ISO 3166-1 alpha-3 country codes
Bounding box: Optional - specify coordinates if needed

Example data structure

Your CSV file should include columns such as: