Earthquake Catalogs

Major Earthquake Catalogs NEIC PDE (National Earthquake Information Center Preliminary Determination of Epicenters) NEIC PDE (National Earthquake Information Center Preliminary Determination of Epicenters) Global catalog Global catalog Creates a list of all earthquakes in specific areas Creates a list of all earthquakes in specific areas Global CMT (Global Centroid Moment Tensor) Global CMT (Global Centroid Moment Tensor) Specific earthquake information used to calculate focal mechanisms Specific earthquake information used to calculate focal mechanisms GNS (Institute of Geologic and Nuclear Science) GNS (Institute of Geologic and Nuclear Science) Specific earthquake information in New Zealand Specific earthquake information in New Zealand

How to Access NEIC PDE Catalog Go to Go to Click on “Search the catalog” Click on “Search the catalog” Enter dates and/or time into the “Start date, time” and “End date, time” boxes Enter dates and/or time into the “Start date, time” and “End date, time” boxes Enter in a magnitude range in the “Min magnitude” and “Max magnitude” boxes Enter in a magnitude range in the “Min magnitude” and “Max magnitude” boxes Enter latitude and longitude range in the given boxes Enter latitude and longitude range in the given boxes Click “Submit request” button Click “Submit request” button

How to Access the Global CMT Catalog Go to Go to Scroll down to the section that is titled “Links to CMT resources:” Scroll down to the section that is titled “Links to CMT resources:” Click on “CMT catalog web search” link Click on “CMT catalog web search” link Enter a starting year, month, and day into the “Starting Date:” table Enter a starting year, month, and day into the “Starting Date:” table In the “Ending Date:” table select the first row that has year, month, and day In the “Ending Date:” table select the first row that has year, month, and day Enter in an ending year, month, and day in the “Ending Date:” table Enter in an ending year, month, and day in the “Ending Date:” table Under “Magnitude constraints:” type in a range of magnitudes in the two boxes after the title “Moment Magnitude” Under “Magnitude constraints:” type in a range of magnitudes in the two boxes after the title “Moment Magnitude” Under “Location constraints:” enter in a range of latitude and longitude in the boxes after the “Latitude:” and “Longitude:” titles Under “Location constraints:” enter in a range of latitude and longitude in the boxes after the “Latitude:” and “Longitude:” titles Select Done Select Done

How to Access GNS Catalog Go to Go to Enter in desired time frame Enter in desired time frame Enter in desired latitude and longitude range Enter in desired latitude and longitude range Enter in desired range of magnitude Enter in desired range of magnitude Select “Submit” Select “Submit”

Uses of Global CMT Catalog Information Use the Global CMT site for focal mechanisms Use the Global CMT site for focal mechanisms The definition of a focal mechanism is: “The direction of slip in an earthquake and the orientation of the fault on which is occurs” (USGS) The definition of a focal mechanism is: “The direction of slip in an earthquake and the orientation of the fault on which is occurs” (USGS) Input focal mechanisms into SCEC-VDO format by: Input focal mechanisms into SCEC-VDO format by: Take information from the CMT search and put it into an excel spreadsheet Take information from the CMT search and put it into an excel spreadsheet Look up information on longitude, latitude, depth, strike, dip, slip and magnitude Look up information on longitude, latitude, depth, strike, dip, slip and magnitude The columns on the spreadsheet should be Long, Lat, Depth, Strike, Dip, Slip, Magnitude (in that order) The columns on the spreadsheet should be Long, Lat, Depth, Strike, Dip, Slip, Magnitude (in that order) Save the excel spreadsheet as a textfile Save the excel spreadsheet as a textfile

Uses of NEIC PDE and GNS Catalog Information NEIC PDE used for global earthquake information NEIC PDE used for global earthquake information GNS used for New Zealand earthquake information GNS used for New Zealand earthquake information Generate lists of earthquakes in a specific area over a given amount of time Generate lists of earthquakes in a specific area over a given amount of time Copy the contents of the list of every earthquake Copy the contents of the list of every earthquake Paste it into notepad Paste it into notepad Save the notepad document as a textfile Save the notepad document as a textfile Import this text file by using the Earthquake Catalog plugin on SCEC- VDO Import this text file by using the Earthquake Catalog plugin on SCEC- VDO

Works Cited Advanced National Seismic System. “ANSS: Composite Earthquake Catalog.” 25 July Web. 23 Sep Advanced National Seismic System. “ANSS: Composite Earthquake Catalog.” 25 July Web. 23 Sep Larson, Erik. “Global CMT Catalog Search.” 25 July Web. 26 Sept Larson, Erik. “Global CMT Catalog Search.” 25 July Web. 26 Sept GeoNet. Home. 3 Aug Web. 3 Aug GeoNet. Home. 3 Aug Web. 3 Aug