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1. 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 ...


2. Circulation, Cross-Shelf Exchange, Sea Ice, and Marine Mammal Habitats on the Alaska Beaufort Sea Shelf [gov.noaa.ngdc.mgg.wcd.HLY1303_EM122]
HLY 13-03 was a familiar mission that continued our efforts from HLY 12-03, beginning and ending in Dutch Harbor, AK. Throughout the mission we remained primarily in the Chukchi and Beaufort Seas, ...


3. NEFSC Autumn Bottom Trawl Survey [gov.noaa.ngdc.mgg.wcd.HB201304_leg01]
The bottom trawl survey is a randomly-stratified survey covering the US EEZ from Cape Hatteras to Nova Scotia, CA. The survey is a fisheries independent survey, which provides scientific information ...


4. 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.


5. Cascadia Initiative Year 3, LEG 3 [gov.noaa.ngdc.mgg.wcd.AT26-02_EM122]
Recover 30 Lamont Doherty Earth Observatory Ocean-bottom Seismometers (OBSs) of 3 different types: ?10 TRM shallow-water OBSs with Trillium compact 3-component absolute pressure gauge installed at ...


6. DY1207 Bering Sea ME70 [gov.noaa.ngdc.mgg.wcd.DY1207_ME70]
Scientists from the Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center (AFSC) have conducted summer surveys to estimate the abundance and distribution ...


7. 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) ...


8. 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) ...


9. HOV Alvin Post-Overhaul Trials, Leg 1 [gov.noaa.ngdc.mgg.wcd.AT26-05_EM122]
Post overhall testing of Alvin


10. Shelikof Strait Acoustic-Trawl Survey of Walleye Pollock (DY1203) [gov.noaa.ngdc.mgg.wcd.DY1203_ME70]
The Midwater Assessment and Conservation Engineering (MACE) program of the Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Gulf of Alaska (GOA) ...


11. Shumagin Islands Acoustic-Trawl Survey of Walleye Pollock (DY1201) [gov.noaa.ngdc.mgg.wcd.DY1201_ME70]
The Midwater Assessment and Conservation Engineering (MACE) program of the Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Gulf of Alaska (GOA) ...


12. Submarine Exploration and Evaluation of Petroleum Seeps (SEEPS) 13 [gov.noaa.ngdc.mgg.wcd.AT26-06_EM122]
1. Conduct in-situ incubations with devices for microbial growth, deployed in 2011. 2. Investigate the fate of dissolved hydrocarbons in the waters along the CA margin. 3. Investigate the variability ...


13. Transit [gov.noaa.ngdc.mgg.wcd.AT26-01_EM122]
Transit from Woods Hole, MA to Astoria, OR.


14. 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 ...


15. 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 ...


16. 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 ...


17. Aeromagnetic Regional Grid Data [gov.noaa.ngdc.mgg.geophysics.G01149]
Several regions are represented in this unique collection of earth surface measurements of magnetic field parameters and their related anomalies. The DNAG Magnetics "Super grid" of Magnetic Anomaly ...


18. 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. ...


19. 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 ...


20. 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. ...


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


22. 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 ...


23. 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 ...


24. 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 ...


25. 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 ...


26. 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.


27. 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 ...


28. 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 ...


29. Selected Geomagnetic Measurements From Several Satellites [gov.noaa.ngdc.mgg.geophysics.G01147]
More than 17 million selected magnetic observations from several orbiting low-altitude satellites are contained in this digital collection. Except for MAGSAT, all the observations are of total intensity ...


30. Values About Ancient Magnetic Poles, Declination, Inclination, and Intensity, That Can Be Used to Track the Magnetic Pole and Continent Movements [gov.noaa.ngdc.mgg.geophysics.G00892]
The study of magnetism is one of the oldest of the geophysical sciences. It is unique among the sciences in that ancient records of the geomagnetic field are preserved in rocks and changes in the ...


31. 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 ...


32. 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 ...


33. 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. ...


34. 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 ...


35. 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. ...


36. 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 ...


37. 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. ...


38. 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, ...


39. 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 ...


40. 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 ...


41. 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 ...


42. 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 ...


43. 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 ...


44. 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 ...


45. 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 ...


46. 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 ...


47. 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 ...


48. 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 ...


49. 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 ...


50. 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 ...


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