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ANSS Comprehensive Earthquake Catalog (ComCat) Documentation
Developer’s Corner - Library of functions and wrapper scripts for accessing and using tools for the NEIC’s ComCat data
Significant Earthquakes Archive

Basic Options

Magnitude

2.5+
4.5+
Custom

Minimum
Maximum

Date & Time

Past 7 Days
Past 30 Days
Custom

Start (UTC)
End (UTC)

Geographic Region

World
Conterminous U.S.¹
Custom

Worldwide

Advanced Options

Geographic Region

Decimal degree coordinates. North must be greater than South. East must be greater than West.

North
West
East
South

Circle

Center Latitude
Center Longitude
Outer Radius (km)

Depth (km)

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Maximum

Azimuthal Gap

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Maximum

Review Status

Any
Automatic
Reviewed

Event Type

Impact (PAGER, ShakeMap, DYFI)

Significance

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Maximum

PAGER Alert Level

Any
Green
Yellow
Orange
Red

ShakeMap MMI

Decimal numbers

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Maximum

Did You Feel It CDI

Decimal numbers

Minimum
Maximum

Number of DYFI? Responses

Minimum

Catalog

For more information on catalogs.

Contributor

For more information on contributors.

Product Type

For more information on product types.

Output Options

Format

Map & List
CSV
KML
QuakeML
GeoJSON

QuakeML-Specific Options

Include all origins
Include all magnitudes

KML-Specific Options

Color by age
Color by depth
Animated

GeoJSON-Specific Options

Callback Option
Format errors as JSON(P)

Order By

Time - Newest First
Time - Oldest First
Magnitude - Largest First
Magnitude - Smallest First

Limit Results

Number of Events
Offset

¹Conterminous U.S. refers to a rectangular region including the lower 48 states and surrounding areas which are outside the Conterminous U.S.

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