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- Paleoseismology abstract "Paleoseismology looks at geologic sediments and rocks, for signs of ancient earthquakes. It is used to supplement seismic monitoring, for the calculation of seismic hazard. Paleoseismology is usually restricted to geologic regimes that have undergone continuous sediment creation for the last few thousand years, such as swamps, lakes, river beds and shorelines.In this typical example, a trench is dug in an active sedimentation regime. Evidence of thrust faulting can be seen in the walls of the trench. It becomes a matter of deducting the relative age of each fault, by cross-cutting patterns. The faults can be dated in absolute terms, if there is dateable carbon, or human artifacts.Many notable discoveries have been made using the techniques of paleoseismology. For example, there is a common misconception that having many smaller earthquakes can somehow 'relieve' a major fault such as the San Andreas, and reduce the chance of a major earthquake. It is now known (using paleoseismology) that nearly all the movement of the fault takes place with extremely large earthquakes. All of these seismic events (with a Moment Magnitude of over 8), leave some sort of trace in the sedimentation record.Another famous example involves the Megathrust earthquakes of the Pacific Northwest. It was thought for some time that there was low seismic hazard in region because relatively few modern earthquakes are being recorded. There was a concept that the subduction zone was merely sliding in a benign manner.All of these comforting notions were shattered by paleoseismology studies showing evidence of extremely large earthquakes, along with historical tsunami records. In effect, the subduction zone under British Columbia, Washington, Oregon, and far northern California, is perfectly normal, being extremely hazardous in the long term, with the capability of generating coastal tsunamis of several hundred feet in height at the coast. These are caused by the interface between the subducted sea floor stressing the overlaying coastal soils in compression. Periodically a slip will occur which causes the coastal portion to reduce in elevation and thrust toward the west, leading to tsunamis in the central and eastern north Pacific ocean (with several hours of warning) and a reflux of water toward the coastal shore, with little time for residents to escape.".
- Paleoseismology thumbnail Paleotr.gif?width=300.
- Paleoseismology wikiPageExternalLink paleoinqua.html.
- Paleoseismology wikiPageExternalLink www.paleoseismicity.org.
- Paleoseismology wikiPageID "2457687".
- Paleoseismology wikiPageLength "4253".
- Paleoseismology wikiPageOutDegree "25".
- Paleoseismology wikiPageRevisionID "683083483".
- Paleoseismology wikiPageWikiLink Category:Fields_of_seismology.
- Paleoseismology wikiPageWikiLink Category:Historical_geology.
- Paleoseismology wikiPageWikiLink Earthquake.
- Paleoseismology wikiPageWikiLink File:HaywardFaultExposed5911.JPG.
- Paleoseismology wikiPageWikiLink File:HaywardFaultExposedComposite.jpg.
- Paleoseismology wikiPageWikiLink File:HaywardFaultExposedNoted.jpg.
- Paleoseismology wikiPageWikiLink File:Paleotr.gif.
- Paleoseismology wikiPageWikiLink Geologic.
- Paleoseismology wikiPageWikiLink Geology.
- Paleoseismology wikiPageWikiLink Lake.
- Paleoseismology wikiPageWikiLink Megathrust_earthquake.
- Paleoseismology wikiPageWikiLink Moment_magnitude_scale.
- Paleoseismology wikiPageWikiLink Paleotempestology.
- Paleoseismology wikiPageWikiLink Radiocarbon_dating.
- Paleoseismology wikiPageWikiLink River.
- Paleoseismology wikiPageWikiLink Rock_(geology).
- Paleoseismology wikiPageWikiLink Sediment.
- Paleoseismology wikiPageWikiLink Seismic_hazard.
- Paleoseismology wikiPageWikiLink Seismite.
- Paleoseismology wikiPageWikiLink Seismology.
- Paleoseismology wikiPageWikiLink Subduction.
- Paleoseismology wikiPageWikiLink Swamp.
- Paleoseismology wikiPageWikiLink Thrust_fault.
- Paleoseismology wikiPageWikiLink Tsunami.
- Paleoseismology wikiPageWikiLink File:Paleosismoloji.jpg.
- Paleoseismology wikiPageWikiLink File:Seismite_Ordovician_Kentucky_Close.jpg.
- Paleoseismology wikiPageWikiLinkText "Paleoseismic studies".
- Paleoseismology wikiPageWikiLinkText "Paleoseismic".
- Paleoseismology wikiPageWikiLinkText "Paleoseismology".
- Paleoseismology wikiPageWikiLinkText "paleoseismic".
- Paleoseismology wikiPageWikiLinkText "paleoseismological".
- Paleoseismology wikiPageWikiLinkText "paleoseismologists".
- Paleoseismology wikiPageWikiLinkText "paleoseismology".
- Paleoseismology hasPhotoCollection Paleoseismology.
- Paleoseismology wikiPageUsesTemplate Template:Clear.
- Paleoseismology wikiPageUsesTemplate Template:Refimprove.
- Paleoseismology wikiPageUsesTemplate Template:Reflist.
- Paleoseismology subject Category:Fields_of_seismology.
- Paleoseismology subject Category:Historical_geology.
- Paleoseismology type Article.
- Paleoseismology type Article.
- Paleoseismology type Field.
- Paleoseismology type Subfield.
- Paleoseismology comment "Paleoseismology looks at geologic sediments and rocks, for signs of ancient earthquakes. It is used to supplement seismic monitoring, for the calculation of seismic hazard. Paleoseismology is usually restricted to geologic regimes that have undergone continuous sediment creation for the last few thousand years, such as swamps, lakes, river beds and shorelines.In this typical example, a trench is dug in an active sedimentation regime.".
- Paleoseismology label "Paleoseismology".
- Paleoseismology sameAs Палеосеизмология.
- Paleoseismology sameAs Paläoseismologie.
- Paleoseismology sameAs Paléosismologie.
- Paleoseismology sameAs Paleosismologia.
- Paleoseismology sameAs m.07fgzf.
- Paleoseismology sameAs Paleosismoloji.
- Paleoseismology sameAs Q1501881.
- Paleoseismology sameAs Q1501881.
- Paleoseismology wasDerivedFrom Paleoseismology?oldid=683083483.
- Paleoseismology depiction Paleotr.gif.
- Paleoseismology isPrimaryTopicOf Paleoseismology.