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1. 5-minute Gridded Global Relief Data (ETOPO5) [gov.noaa.ngdc.mgg.dem.3141]
Earth topography five minute grid (ETOPO5) is a gridded data base of worldwide elevations derived from several sources at a resolution of 5 minutes of latitude and longitude. Data are also available ...


2. GEOSAT 44: High-Accuracy, High-Resolution Gravity [gov.noaa.ngdc.mgg.geophysics.G01495]
This satellite altimeter data base contains precise geoid and gravity anomaly profiles which were constructed from the average of 44 repeat cycles of Geosat. The data are contained in two files: (1) ...


3. GEOSAT44: High-Accuracy, High-Resolution Gravity [gov.noaa.ngdc.mgg.geophysics.G01494]
This satellite altimeter data base contains precise geoid and gravity anomaly profiles which were constructed from the average of 44 repeat cycles of Geosat. The data are contained in two files: (1) ...


4. High Density GEOSAT/GM Altimeter Data [gov.noaa.ngdc.mgg.geophysics.G01448]
The high density Geosat/GM altimeter data south of 30 S have finally arrived. In addition, ERS-1 has completed more than 6 cycles of its 35-day repeat track. These data provide a dramatically improved ...


5. NGS Absolute Gravity Data [gov.noaa.ngdc.mgg.geophysics.G01449]
The NGS Absolute Gravity data (78 stations) was received in July 1993. Principal gravity parameters include Gravity Value, Uncertainty, and Vertical Gradient. The data are randomly spaced worldwide.


6. 1-deg x 1-deg Terrestrial Mean Free-Air Anomalies [gov.noaa.ngdc.mgg.geophysics.G01414]
The 1x1 degree Terrestrial Mean Free-Air Gravity Anomaly and Geoid Undulations Data Base was compiled and developed by the Ohio State University. This data base was received in March 1993. Principal ...


7. 30-min x 30-min Terrestrial Mean Free-Air Anomalies [gov.noaa.ngdc.mgg.geophysics.G01415]
The 30-min x 30-min Terrestrial Mean Free-Air Gravity Anomaly and Geoid Undulations Data Base was compiled and developed by the Ohio State University. This data base was received in March 1993. Principal ...


8. Bolivian Bouguer Anomaly Grid [gov.noaa.ngdc.mgg.geophysics.G01498]
A 1 kilometer Bouguer anomaly grid for the country of Bolivia.Number of columns is 550 and number of rows is 900. The order of the data is from the lower left to the right and then up one row.


9. GEOSAT Southern Ocean (30S-72S Lat.} Altimeter Data [gov.noaa.ngdc.mgg.geophysics.G01418]
GEOSAT DATA: Gridded Gravity Anomalies for the Southern Ocean


10. Haxby Worldwide Gravity Grid [gov.noaa.ngdc.mgg.geophysics.G01412]
In 1985, Dr. William F. Haxby of the Lamont-Doherty Geological Observatory of Columbia University prepared this data base of free-air gravity anomalies, based on the radar altimetry of the SEASAT ...


11. Regional Files of GEOS3/SEASAT/GEOSAT Data [gov.noaa.ngdc.mgg.geophysics.G01413]
Gravity anomalies and sea surface heights have been computed on a 0.125 degree grid in the ocean areas from a combined GEOS3/SEASAT/GEOSAT altimeter data set. This data base was received in March ...


12. Regional Files of GEOS3/SEASAT/GEOSAT Data [gov.noaa.ngdc.mgg.geophysics.G01416]
Gravity anomalies and sea surface heights have been computed on a 0.125 degree grid in the ocean areas from a combined GEOS3/SEASAT/GEOSAT altimeter data set. This data base was received in March ...


13. Collection of Observed Gravity Values, Absolute Gravity Measurements, Grids and Other Derived Summary Data [gov.noaa.ngdc.mgg.geophysics.G01018]
The National Geophysical Data Center (NGDC) of NOAA, in cooperation with the National Geodetic Survey of NOAA, have published a Gravity CD-ROM containing observed and derived gravity measurements. ...


14. Crustal Ages of the Ocean Floor - Poster [gov.noaa.ngdc.mgg.geophysics.G01167]
The Crustal Ages of the Ocean Floor Poster was created at NGDC using the Crustal Ages of the Ocean Floor database draped digitally over a relief of the ocean floor database. The Crustal Ages of the ...


15. Data on the Earth's Magnetic Field and its Secular Change since 1800 [gov.noaa.ngdc.mgg.geophysics.G01152]
Information on the past and present orientation of the Earth's magnetic field is available from the National Geophysical Data Center (NGDC) which serves as the national data bank for geomagnetic data. ...


16. Global Gravity Grids, Geoid Height and Gravity Anomaly Profiles [gov.noaa.ngdc.mgg.geophysics.G01146]
The entire collection of GEOSAT ERM (Nov.'86 - Dec. '89) data over land and ice regions is held at the National Geophysical Data Center (NGDC). These data will yield reasonable elevation values for ...


17. Land and Marine Gravity Data on CD-ROM - 1999 Edition [gov.noaa.ngdc.mgg.geophysics.G01352]
The Land and Marine Gravity 1999 Edition 2-volume CD-ROM set contains observed and derived land and marine gravity data contributed by many national and international organizations, from both the ...


18. Behavior of Columns During Earthquakes [gov.noaa.ngdc.mgg.photos.G01215]
The behavior of columns during earthquakes is very important since column failures may lead to additional structural failures and result in total building collapses. For example, in the Mexico City ...


19. Earthquake Damage - General [gov.noaa.ngdc.mgg.photos.G01194]
An earthquake is the motion or trembling of the ground produced by sudden displacement of rock in the Earth's crust. Earthquakes result from crustal strain, volcanism, landslides, and collapse of ...


20. Earthquake Damage to Schools [gov.noaa.ngdc.mgg.photos.G01198]
This set of slides graphically illustrates the potential danger that major earthquakes pose to school structures and to the children and adults who happen to be inside at the time of the earthquake. ...


21. Earthquake Damage to Transportation Systems [gov.noaa.ngdc.mgg.photos.G01197]
Earthquakes represent one of the most destructive natural hazards known to man. A serious result of large-magnitude earthquakes is the disruption of transportation systems, which limits post-disaster ...


22. Erosional Landforms [gov.noaa.ngdc.mgg.photos.G01217]
The hydrologic system, which includes all possible paths of motion of Earth's near-surface fluids including air and water, is largely responsible for the variety of landforms found on the continents. ...


23. Faults [gov.noaa.ngdc.mgg.photos.G01203]
Through the study of faults and their effects, much can be learned about the size and recurrence intervals of earthquakes. Faults also teach us about crustal movements that have produced mountains ...


24. Landslides, Set 1 [gov.noaa.ngdc.mgg.photos.G01199]
This set of slides graphically illustrates the potential danger that major earthquakes pose to school structures and to the children and adults who happen to be inside at the time of the earthquake. ...


25. Landslides, Set 2 [gov.noaa.ngdc.mgg.photos.G01372]
This set expands the topics included in Set 1 and includes (in addition to landslides) rockfalls, rock avalanches, mud flows, debris flows, slumps, creep, and sinkholes. The photos were taken in California, ...


26. Seismic Creep [gov.noaa.ngdc.mgg.photos.G01216]
Seismic creep is the constant or periodic movement on a fault as contrasted with the sudden erupture associated with an earthquake. It is a usually slow deformation of rock resulting from constant ...


27. Tsunamis - General [gov.noaa.ngdc.mgg.photos.G01218]
Tsunami is a Japanese word meaning harbor wave. It is a water wave or a series of waves generated by an impulsive vertical displacement of the surface of the ocean or other body of water. This slide ...


28. Volcanic Rocks and Features [gov.noaa.ngdc.mgg.photos.G01222]
Volcanoes have contributed significantly to the formation of the surface of our planet. Volcanism produced the crust we live on and most of the air we breathe. The remnants of an eruption reveal as ...


29. Volcanoes in Eruption - Set 1 [gov.noaa.ngdc.mgg.photos.G01221]
The word volcano is used to refer to the opening from which molten rock and gas issue from Earth's interior onto the surface, and also to the cone, hill, or mountain built up around the opening by ...


30. Volcanoes in Eruption - Set 2 [gov.noaa.ngdc.mgg.photos.G01223]
The word volcano is used to refer to the opening from which molten rock and gas issue from Earth's interior onto the surface, and also to the cone, hill, or mountain built up around the opening by ...


31. NOAA/WDS Global Historical Tsunami Database at NGDC, 2100 BC to present [gov.noaa.ngdc.mgg.hazards.G02151]
The Global Historical Tsunami Database provides information on over 2,400 tsunamis from 2100 BC to the present in the the Atlantic, Indian, and Pacific Oceans; and the Mediterranean and Caribbean ...


32. Global Significant Earthquake Database, 2150 BC to present [gov.noaa.ngdc.mgg.hazards.G012153]
The Significant Earthquake Database is a global listing of over 5,700 earthquakes from 2150 BC to the present. A significant earthquake is classified as one that meets at least one of the following ...


33. Global Significant Volcanic Eruptions Database, 4360 BC to present [gov.noaa.ngdc.mgg.hazards.G10147]
The Significant Volcanic Eruptions Database is a global listing of over 600 eruptions from 4360 BC to the present. A significant eruption is classified as one that meets at least one of the following ...


34. Global Volcano Locations Database [gov.noaa.ngdc.mgg.hazards.G02135]
NGDC maintains a database of over 1,500 volcano locations obtained from the Smithsonian Institution Global Volcanism Program, Volcanoes of the World publication. The database includes information ...


35. Seismicity Catalog Collection, 2150 BC to 1996 AD [gov.noaa.ngdc.mgg.hazards.G01318]
The Seismicity Catalog Collection is a compilation data on over four million earthquakes dating from 2150 BC to 1996 AD from NOAA's National Geophysical Data Center and U.S. Geological Survey's National ...


36. Strong Motion Earthquake Data Values of Digitized Strong-Motion Accelerograms, 1933-1994 [gov.noaa.ngdc.mgg.hazards.G01145]
The Strong Motion Earthquake Data Values of Digitized Strong-Motion Accelerograms is a database of over 15,000 digitized and processed accelerograph records from 1933 to 1994. Data were obtained from ...


37. United States Earthquake Intensity Database, 1638-1985 [gov.noaa.ngdc.mgg.hazards.G01142]
The United States Earthquake Intensity Database is a collection of damage and felt reports for over 23,000 U.S. earthquakes from 1638-1985. The majority of intensities are for U.S. cities, but there ...


38. NOAA National Centers for Environmental Prediction (NCEP)'s Global Forecast System (GFS) Model [NOAA_NCEP_GFS_Model]
Two times daily global analysis fields from the NOAA National Centers for Environmental Prediction (NCEP)'s Global Forecast System (GFS) Model. Data are served by the Center for Ocean-Land-Atmosphere ...


39. NOAA/NCEP Global Forecast System (GFS) Atmospheric Model [ncep_global]
U.S. National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Prediction (NCEP) Global Forecast System (GFS) numerical weather prediction model 8-day, 3-hourly forecast ...


40. DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures [NSIDC-0032]
This Level-3 Equal-Area Scalable Earth-Grid (EASE-Grid) Brightness Temperature data set, collected since 09 July 1987, is a part of the NOAA/NASA Pathfinder Program. The data set consists of gridded ...


41. Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures [NSIDC-0071]
This data set consists of brightness temperatures acquired from the Scanning Multichannel Microwave Radiometer (SMMR) on board the Nimbus-7 Pathfinder satellite. The brightness temperatures have been ...


42. Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent [NSIDC-0046]
The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent Version 4 product combine snow cover and sea ice extent at weekly intervals from 23 October 1978 through 31 December 2011, ...


43. Worldwide Interpretive Reports for Marine Seismic-Reflection and Other Geophysical Data [gov.noaa.ngdc.mgg.seismic.G00976]
This file contains US Geological Survey Open File Reports for Marine Seismic-Reflection data. The majority of these data are available on mylar/black line full-size sections. Lines may be obtained ...


44. Downhole Logging Data from the Deep Sea Drilling Project [gov.noaa.ngdc.mgg.well_log.G00913]
Digital downhole wire-line logging data from the Deep Sea Drilling Project (DSDP) previously available from NGDC on CD-ROM are now available from the Borehole Research Group of the Lamont-Doherty ...


45. Water Column Sonar Data Collection [gov.noaa.ngdc.mgg.wcd.WCD_Collection]
The collection and analysis of water column sonar data is a relatively new avenue of research into the marine environment. Primary uses include assessing biological abundance, species identification,and ...


46. Calculations of the Total Number of Electrons Along a Ray Path Extending from the Transmitter to the Receiver [gov.noaa.ngdc.stp.ionosphere.G00566]
Ionospheric Total Electron Content (TEC) is the total number of electrons in a column of unit cross section extending from the transmitter to the receiver. TEC is calculated from observations of the ...


47. Defense Meteorological Satellite Program (DMSP) - Space Weather Sensors [gov.noaa.ngdc.stp.ionosphere.G10022]
The Defense Meteorological Satellite Program (DMSP) maintains a constellation of sun-synchronous, near-polar orbiting satellites. The orbital period is 101 minutes and inclination is 99 degrees. The ...


48. Ionospheric Oblique Incidence Soundings by Satellites [gov.noaa.ngdc.stp.ionosphere.G00563]
The oblique incidence sweep-frequency ionospheric sounding technique uses the same principle of operation as the vertical incidence sounder. The primary difference is that the transmitter and receiver ...


49. Measurement of Incoherent Scatter [gov.noaa.ngdc.stp.ionosphere.G00145]
For radio waves transmitted through the ionosphere with frequencies much larger (50 to 1300MHz) than the plasma frequency (up to 15MHz), very small-scale fluctuations of electron density will scatter ...


50. AA Geomagnetic Activity Indices From Two Antipodal Observatories in Australia and England [gov.noaa.ngdc.stp.indices.G00588]
The National Geophysical Data Center receives, on a monthly basis, indices that are based on the data from two approximately antipodal observatories in England and Australia. The AA-indices are available ...


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