Query for Events and Associated Origins
Note: Only origins matching query criteria will be displayed which can result in no prime origin displayed for an event.
mag >=    <= mag type ALL CL LG MB MD ME MG ML MS MW depth >=  <=   time between primary origins only   show most recent first catalog ALL ISC NEIC PDE ANF GCMT contributor ALL ISC NEIC PDE-M NEIC PDE-W NEIC PDE-Q NEIC ALERT ANF GCMT GCMT-Q View earliest/latest origin times for each catalog... Flinn-Engdahl code (subregion) region region text	latitude and longitude   NORTH   WEST EAST   SOUTH   Click on the map icon to get coordinates from an interactive map You can search by latitude and longitude OR Flinn-Engdahl codes or text - but not both. Get help with this query » About catalogs »
The option to create a WEED file appears after "View Results".

How this query works

We load events from several sources including USGS ENS alert, USGS QED, USGS Weekly PDE, USGS Monthly PDE, GCMT, and ISC dating from 1960 to the present. We also provide mapping and WEED file output options.

• You must enter a value in at least one field.
• Contributor refers to the entity that contributes the hypocenter information to a catalog listing.
• You can search by latitude and longitude OR Flinn-Engdahl codes or text - but not both.
• Click the 'map' icon to bring up an interactive map for selecting a region of interest.
• For those fields using >= and <= :
  • values in both boxes will result in a query between the first value and the second value
  • only value in the >= box will query for all values greater than or equal to that value
  • only value in the <= box will query for all values less than or equal to that value
• You can review the list of Flinn-Engdahl regions by which to search.
  • If you select a REGION CODE you MAY NOT enter a SEISMIC CODE or REGION text (it's redundant).
  • If you select a SEISMIC CODE you MAY also search by REGION text.
    Example: You may want to search for events in the Oregon area but only for those that happened off the coast. You would enter the appropriate SEISMIC CODE and the word 'coast' in the text box.
• The REGION text is already wildcarded for you - you don't need to wildcard for single word strings.
• You can search for multiple word stings in REGION (like 'SEA OF') but you MAY NOT search for comma separated strings (like OREGON, USA).

 

Mapping Events

When "Make Event Map" is selected on the results page, one event per group is selected for the map. The event listing selected is the one with the largest magnitude for that group. If there are two listings with the same magnitude in a group, the one from the most accurate catalog for that time period is selected. ( more details )