|
|
Earthquake Damage - GeneralidentificationInfocontentInfo distributionInfo metadataMaintenance |
| (MI_Metadata) fileIdentifier: gov.noaa.ngdc.mgg.photos:G01194 language: eng; USA characterSet: (MD_CharacterSetCode) utf8 hierarchyLevel: (MD_ScopeCode) dataset contact: (CI_ResponsibleParty) individualName: Heather McCullough organisationName: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (303) 497-3707 facsimile: (303) 497-6513 address: (CI_Address) deliveryPoint: NOAA/NESDIS/NGDC E/GC3 325 Broadway city: Boulder administrativeArea: CO postalCode: 80305-3328 country: USA electronicMailAddress: Heather.McCullough@noaa.gov hoursOfService: 7:30 - 5:00 Mountain contactInstructions: Contact Data Center role: (CI_RoleCode)http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode dateStamp: 2011-04-06 metadataStandardName: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data metadataStandardVersion: ISO 19115-2:2009(E) return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: Earthquake Damage - General date: (CI_Date) date: 1994 dateType: (CI_DateTypeCode) publication edition: First identifier: (MD_Identifier) code: Document citedResponsibleParty: (CI_ResponsibleParty) organisationName: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp) role: (CI_RoleCode) originator citedResponsibleParty: (CI_ResponsibleParty) organisationName: National Geophysical Data Center contactInfo: (CI_Contact) address: (CI_Address) city: Boulder administrativeArea: CO role: (CI_RoleCode) publisher presentationForm: abstract: 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 caverns. Earthquakes can affect hundreds of thousands of square kilometers; cause damage to property measured in the tens of billions of dollars; result in loss of life and injury to hundreds of thousands of persons; and disrupt the social and economic functioning of the affected area. This set of slides provides an overview and summary of effects caused by 11 earthquakes in eight countries. The images show surface faulting, landslides, soil liquefaction, and structural damage.Stress accumulates in response to tectonic forces until it exceeds the strength of the rock. The rock then breaks along a preexisting or new fracture called a fault. The rupture extends outward in all directions along the fault plane from its point of origin (focus). The rupture travels in an irregular manner until the stress is relatively equalized. If the rupture disturbs the surface, it produces a visible fault. Earthquakes can affect hundreds of thousands of square kilometers; cause damage to property measured in the tens of billions of dollars; result in loss of life and injury to hundreds of thousands of persons; and disrupt the social and economic functioning of the affected area. Although earthquakes in the United States occur most frequently in states west of the Rocky Mountains, devastating earthquakes have also occurred in the Midwest and East. All 50 states have some degree of risk from earthquakes. Earthquakes can be measured in terms of either the amount of energy they release (magnitude) or the degree of ground shaking they cause at a particular locality (intensity). Magnitude is calculated from the record (wave amplitude) made by an earthquake on a calibrated seismograph. The magnitude scale is logarithmic. An increase of one in magnitude represents a tenfold increase in the recorded wave amplitude. However, the energy release associated with an increase of one in magnitude is not tenfold, but about thirty fold. For example, approximately 900 times more energy is released in an earthquake of magnitude 7 than in an earthquake of magnitude 5. Intensity is determined from observations of the earthquake's effect on people, structures, and the earth's surface at a given locality. When a fault ruptures, seismic waves propagate outward in all directions and ground shaking results. Generally the severity of ground shaking increases as magnitude increases and decreases as distance from the fault rupture increases. The severity of the ground shaking can be enhanced by certain soil and subsoil types. The intensity of the earthquake is affected by the severity of the ground shaking, the duration of the shaking, the response of structures in the affected area, etc. Hazards associated with earthquakes include ground shaking, surface faulting, earthquake-induced ground failures, tectonic uplift and subsidence, and tsunamis. Surface faulting, the offset of the earth's surface by differential movement across a fault, shears and tears structures built on the fault. Surface faulting is generally accompanied by horizontal or vertical distortion of the earth's surface that can distort or tilt structures constructed near the fault. Regional uplift and subsidence may accompany earthquakes caused by large displacements on shallow faults. Such changes can damage harbor facilities, canals, roads, railroads, and other structures. A tsunami 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 by an earthquake or other cause. These waves can extend the damaging effects of an earthquake event thousands of kilometers from the earthquake focus. Ground failures accompanying earthquakes include landslides, liquefaction, lateral spreads, differential settlements, and ground cracks. Earthquake shaking often dislodges rock and debris on steep slopes, triggering rock falls, avalanches, and landslides. These slides have been known to bury entire towns and may be the most damaging aspect of the earthquake event. Liquefaction occurs where ground water is near the surface in soils composed of sands and silts. The soil temporarily loses strength and behaves as a viscous liquid. Structures can settle or tip in the liquefied soil or be ripped apart as the ground spreads laterally or flows. Flow failures can move over kilometers at speeds of tens of kilometers per hour. They usually develop in loose, saturated sand on slopes greater than five percent. When subsurface sand layers lose strength because of liquefaction, lateral spreading can occur in overlying sediments allowing them to move down even the gentlest slopes. Soils may lose shear strength allowing heavy structures to settle or tip and lightweight, buried structures to rise buoyantly. Cracking may result from movement along faults, differential compaction of the soil, or slides. Strong ground shaking has compacted loose cohesionless materials and caused differential ground settlements ranging from 5 cm to more than a meter. Many of these earthquake effects are depicted in the slides included in this set. purpose: To provide long-term scientific data stewardship for the Nation's geophysical data, ensuring quality, integrity, and accessibility. credit: Patricia Lockridge status: (MD_ProgressCode) completed pointOfContact: (CI_ResponsibleParty) individualName: Heather McCullough organisationName: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (303) 497-3707 facsimile: (303) 497-6513 address: (CI_Address) deliveryPoint: NOAA/NESDIS/NGDC E/GC3 325 Broadway city: Boulder administrativeArea: CO postalCode: 80305-3328 country: USA electronicMailAddress: Heather.McCullough@noaa.gov hoursOfService: 7:30 - 5:00 Mountain contactInstructions: Contact Data Center role: (CI_RoleCode) pointOfContact resourceMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) notPlanned graphicOverview: (MD_BrowseGraphic) fileName: http://www.ngdc.noaa.gov/hazard/icons/small_res/1/1_25.jpg fileDescription: Earthquake of June 16, 1964, Niigata, Japan.The magnitude 7.4 earthquake killed 26 and destroyed 3,018 houses and moderately or severely damaged 9,750 in Niigata prefecture. Aerial view of leaning apartment houses in Niigata produced by soil liquefaction and the behavior of poor foundations. Most of the damage was caused by cracking and unequal settlement of the ground such as is shown here. About 1/3 of the city subsided by as much as 2 meters as a result of sand compaction. fileType: JPEG descriptiveKeywords: (MD_Keywords) keyword: Earth Science > Solid Earth > Seismology > Earthquake Occurrences type: (MD_KeywordTypeCode) theme thesaurusName: (CI_Citation) title: NASA/GCMD Earth Science Keywords date: descriptiveKeywords: (MD_Keywords) keyword: Disasters > Catastrophic phenomena > Earthquakes keyword: Lithosphere > Seismic activity > Seismic activity type: (MD_KeywordTypeCode) theme thesaurusName: (CI_Citation) title: INFOTERRA Keyword Thesaurus date: descriptiveKeywords: (MD_Keywords) keyword: Photo keyword: Natural Hazard type: (MD_KeywordTypeCode) theme thesaurusName: (CI_Citation) title: Uncontrolled Keywords date: descriptiveKeywords: (MD_Keywords) keyword: WDC/MGG, BOULDER > World Data Center for Marine Geology and Geophysics, Boulder keyword: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce type: (MD_KeywordTypeCode) theme thesaurusName: (CI_Citation) title: NASA/GCMD Data Center Keywords date: descriptiveKeywords: (MD_Keywords) keyword: Global type: (MD_KeywordTypeCode) place thesaurusName: (CI_Citation) title: NASA/GCMD Location Keywords date: resourceConstraints: (MD_LegalConstraints) accessConstraints: (MD_RestrictionCode) otherRestrictions useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Access Constraints: None Use Constraints: None Distribution Liability: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. aggregationInfo: (MD_AggregateInformation) aggregateDataSetIdentifier: (MD_Identifier) authority: (CI_Citation) title: Container Packet ID date: code: G01143 associationType: (DS_AssociationTypeCode) language: eng; USA topicCategory: (MD_TopicCategoryCode) geoscientificInformation extent: (EX_Extent) geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -149.53 eastBoundLongitude: 139.03 southBoundLatitude: -31.38 northBoundLatitude: 61.13 temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: Publication Date beginPosition: 1959-08-18 endPosition: 1980-11-30 return to top contentInfo: return to top distributionInfo: (MD_Distribution) distributionFormat: (MD_Format) name: TIFF version: distributionFormat: (MD_Format) name: JPEG version: distributor: (MD_Distributor) distributorContact: (CI_ResponsibleParty) individualName: User Services organisationName: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (303) 497-6826 facsimile: (303) 497-6513 address: (CI_Address) deliveryPoint: NOAA/NESDIS/NGDC E/GC 325 Broadway city: Boulder administrativeArea: CO postalCode: 80305-3328 country: USA electronicMailAddress: ngdc.info@noaa.gov hoursOfService: 7:30 - 5:00 Mountain role: (CI_RoleCode) distributor distributionOrderProcess: (MD_StandardOrderProcess) fees: None orderingInstructions: Ordering Instructions: Product may be download at: http://www.ngdc.noaa.gov/nndc/struts/results?eq_1=1&t=101634&s=0&d=4&d=44 turnaround: None transferOptions: (MD_DigitalTransferOptions) transferSize: Real: 25614 onLine: (CI_OnlineResource) linkage: http://www.ngdc.noaa.gov/nndc/struts/results?eq_1=1&t=101634&s=0&d=4&d=44 onLine: (CI_OnlineResource) linkage: http://www.ngdc.noaa.gov/hazard/ transferOptions: (MD_DigitalTransferOptions) offLine: (MD_Medium) name: (MD_MediumNameCode) cdRom mediumFormat: (MD_MediumFormatCode) iso9660 return to top metadataMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: maintenanceNote: This metadata was automatically generated from the Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata standard version FGDC-STD-012-2002 using the June 2011 version of the FGDC RSE to ISO 19115-2 transform. The Spatial Reference Information is not currently mapped over to ISO but will be mapped in future versions. contact: (CI_ResponsibleParty) individualName: Heather McCullough organisationName: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (303) 497-3707 facsimile: (303) 497-6513 address: (CI_Address) deliveryPoint: NOAA/NESDIS/NGDC E/GC3 325 Broadway city: Boulder administrativeArea: CO postalCode: 80305-3328 country: USA electronicMailAddress: Heather.McCullough@noaa.gov hoursOfService: 7:30 - 5:00 Mountain contactInstructions: Contact Data Center role: (CI_RoleCode) custodian |
