Earthquake : public <<Feature>> class
Created: |
9/25/2007 10:44:56 AM |
Modified: |
9/25/2007 11:16:39 AM |
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Project: |
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Author: |
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Version: |
1.0 |
Phase: |
1.0 |
Status: |
Proposed |
Complexity: |
Easy |
Advanced: |
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UUID: |
{2361416D-25A6-40d2-9DCB-87C5383627B9} |
Appears In: |
Hazards |
<p>This map layer contains the locations and attributes of significant,<br/></p><p>historic earthquakes that caused deaths, property damage, and geological effects, or were otherwise experienced by populations in the United States, Puerto Rico, and U.S. Virgin Islands. <br/></p><p><br/></p><p>Included are earthquakes<br/></p><p>located in the United States as well as some that occurred in adjacent<br/></p><p>portions of Canada and Mexico. The main sources for the data are<br/></p><p>Seismicity of the United States, 1568-1989 and the Preliminary<br/></p><p>Determination of Epicenters for 1990 to January 2004. This is a<br/></p><p>replacement for the June 1999 map layer.<br/></p><p><br/></p><p>These data are intended for geographic display and analysis at the<br/></p><p>national level, and for large regional areas. The data should be<br/></p><p>displayed and analyzed at scales appropriate for 1:2,000,000-scale data.<br/></p><p>No responsibility is assumed by the National Atlas of the United States<br/></p><p>or the U.S. Geological Survey in the use of these data. This data set is<br/></p><p>intended for a mixed audience of specialists and non-specialists alike who have a need for general, non-technical information about significant<br/></p><p>United States earthquakes.<br/></p><p><br/></p><p>Provided with the downloadable files is a text file,<br/></p><p>quksigx_references.txt, which contains the reference information for<br/></p><p>earthquake magnitudes listed in the data.<br/></p>
Attribute |
Details |
public DateTime EarthquakeWhenDateTime |
Notes:
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When the earthquake occurred.
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public LengthMeasure EarthquakeDepthKMMeasure |
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The depth of earthquake's focus in kilometers. A value of 0 may indicate the depth is unknown.
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public Number EarthquakeBodyWaveMagnitudeNumeric |
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The body wave magnitude of the earthquake as reported by the U.S.<br />Geological Survey. A body wave is a seismic wave that travels through the Earth's inner layers.
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public Number EarthquakeSurfaceWaveMagnitudeNumeric |
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The surface wave magnitude of the earthquake as reported by the U.S.<br />Geological Survey. A surface wave is a seismic wave that travels along the Earth's surface.
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public EarthquakeIntensity EarthquakeOtherMagnitude |
Range:0 to 2
Notes:
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Other measure of earthquake intensity.
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public Number EarthquakeMmioNumeric |
Notes:
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Modified Mercalli Intensity (MMI), where the integer value represents<br />the Roman numeral designation of the MMI intensity.
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public AreaMeasure EarthquakeFeltAreaSqKMAreaMeasure |
Notes:
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The area, in square kilometers, in which the earthquake was felt.
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