Identification_Information:
Citation:
Citation_Information:
Originator: Rhea, Susan
Publication_Date: 1997
Title:
Seismotectonic maps in the vicinity of the lower Wabash Valley,
Illinois, Indiana, and Kentucky - Digital Spatial Database:
Modified Mercalli Intensity contours for the earthquake on
September 25, 1876 at 0600 GMT and 0615 GMT
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Denver
Publisher: US Geological Survey
Online_Linkage: <URL:ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-97-0681>
Description:
Abstract:
This cover is one of many that contain isoseismals of historic
Central U.S. earthquakes.
Margaret Hopper provided these isoseismals after reexamining the
intensity data and re-calculating the isoseismal contours. She
generated isoseismal contours for each earthquake using computer
contouring software, but adjusted positions of contours where, in
her expert opinion, computer software had erroneously located them.
Some isoseismals were unchanged from original authors and are
referenced in her unpublished manuscript. Most isoseismals were
changed to incorporate new information and to conform to common,
modern, standards.
The values for intensity reported in these data are consistent with
the Modified Mercali Intensity (MMI) scale. This scale is useful
for describing damage from earthquakes. For historical
earthquakes, these values are gathered in the 4 - 10 range. In the
central U.S., historical earthquakes have caused damage in the 4 -
8 range only. Intensity data are usually reported in Roman
numerals, however Arabic numerals are used for computer
accessibility.
This cover contains data for the earthquake on September 25, 1876
at 0600 GMT; mag 4.5, and 0615 GMT; mag 4.8.
Purpose:
The data was generated to help in understanding the seismotectonic
hazards in the vicinity of the lower Wabash Valley. This data
complements similar data collected in the vicinity of New Madrid, MO
(US Geological Survey Open-File Report 95-0574, available via ftp at
<URL:/ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-95-0574>)
Supplemental_Information:
Procedures_Used:
Images of the isoseismals were created by Hopper using FileMakerPro
on a Macintosh computer. She provided hard-copy output on 8" x 10"
paper. Contours were then digitized on an Altek digitizer table
using Arc/Info. Arcs were edited and smoothed using grain, spline,
and generalize.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 18760925
Ending_Date: 19930000
Status:
Progress: complete
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -92.77226257
East_Bounding_Coordinate: -75.65071106
North_Bounding_Coordinate: 42.45173264
South_Bounding_Coordinate: 29.72721672
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: earthquakes intensity
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Wabash Valley
Use_Constraints:
The original source figure was prepared at page-size scale, or
roughly at 1:10,000,000. The user should exercise caution in assuming
too high a quality in location of contours. The contours are best
considered approximate.
no liability expressed or implied.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: MS966, Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: email is the best way to make contact
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.1.1
Cross_Reference:
Citation_Information:
Originator: Rhea, Susan, Wheeler, R.L., and Hopper, M.G.
Publication_Date: 1996
Title:
Map showing earthquake intensities in the vicinity of the lower
Wabash Valley, Illinois, Indiana, and Kentucky
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Investigations Map
Issue_Identification: I-Map 2583-B
Publication_Information:
Publication_Place: Denver, CO
Publisher: U.S. Geological Survey
Other_Citation_Details: pamphlet accompanies map
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: See Entity_Attribute_Information
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: See Explanation
Attribute_Accuracy_Explanation:
Attribute_Accuracy:
Logical_Consistency_Report: Point features present.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 10 km
Horizontal_Positional_Accuracy_Explanation: approximate width of line on figure used to digitize contours
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Hopper, Margaret
Publication_Date: in prep 1996
Title: Atlas of Earthquake Damage in the Central US
Geospatial_Data_Presentation_Form: digital
Publication_Information:
Publisher: U.S. Geological Survey
Other_Citation_Details: written communication 1995
Online_Linkage: hopper@usgs.gov
Source_Scale_Denominator: 10,000,000
Process_Step:
Process_Description: see Procedures
Source_Used_Citation_Abbreviation: None
Process_Date: 19970716
Process_Time: 1528
Source_Produced_Citation_Abbreviation: None
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 7
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 47
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 8
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: Unknown
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: I187609.PAT
Entity_Type_Definition: values for modified mercali intensity contours
Entity_Type_Definition_Source: Margaret Hopper pers. commun., 1995
Attribute:
Attribute_Label: -
Attribute_Definition: values for modified mercali intensity contours
Attribute_Definition_Source: Margaret Hopper pers. commun., 1995
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: -
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of poly/region in square coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of poly/region in coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Attribute:
Attribute_Label: I187609#
Attribute_Definition: Internal feature number
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Attribute:
Attribute_Label: I187609-ID
Attribute_Definition: User-assigned feature number
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Attribute:
Attribute_Label: INTENSITY
Attribute_Definition: average of intensity values from felt reports
Attribute_Definition_Source: Margaret Hopper, person. commun., 1995
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 4-8
Overview_Description:
Entity_and_Attribute_Overview: polygon attributes include a value for MMI.
Entity_and_Attribute_Detail_Citation: Not Available
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: MS966, Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: email is the best way to make contact
Resource_Description: wabash data
Distribution_Liability: no liability expressed or implied
Custom_Order_Process: inquire about special distribution services
Technical_Prerequisites: must have AI v703 or AV3
Available_Time_Period:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: present
Ending_Date: open
Metadata_Reference_Information:
Metadata_Date: 19971002
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: MS966, Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: email is the best way to make contact
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 19940608
Metadata_Time_Convention: Local Time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None