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50 years. The term is used specifically for general building codes, which people commonly occupy; building codes in many localities will require non-essential buildings to be designed for "collapse prevention" in an MCE, so that the building remains standing - allowing for safety and escape of occupants - rather than full structural survival of the building.
907:
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224:, a company founded in 2014, offers a seismic hazard rank for all of the conterminous US. This service is free and ad-free for the public. The hazard rank "is made for the likelihood of experiencing strong shaking (0.4g peak ground acceleration) in 30 years, based on the 2014 USGS NSHMP hazard model."
128:
The computer program then integrates over all the zones and produces probability curves for the key ground motion parameter. The final result gives a 'chance' of exceeding a given value over a specified amount of time. Standard building codes for homeowners might be concerned with a 1 in 500 years
177:
A far more detailed and stringent MCE stands for "maximum credible earthquake", which is used in designing for skyscrapers and larger civil infrastructure, like dams, where structural failure could lead to other catastrophic consequences. These MCEs might require determining more than one specific
173:
In a normal seismic hazard analyses intended for the public, that of a "maximum considered earthquake", or "maximum considered event" (MCE) for a specific area, is an earthquake that is expected to occur once in approximately 2,500 years; that is, it has a 2-percent probability of being exceeded in
556:
Giardini, D., Grünthal, G., Shedlock, K. M. and Zhang, P.: The GSHAP Global
Seismic Hazard Map. In: Lee, W., Kanamori, H., Jennings, P. and Kisslinger, C. (eds.): International Handbook of Earthquake & Engineering Seismology, International Geophysics Series 81 B, Academic Press, Amsterdam,
97:
records; secondly, the impacts from these sources are assessed relative to local geologic rock and soil types, slope angle and groundwater conditions. Zones of similar potential earthquake shaking are thus determined and drawn on maps. The well known
144:
More elaborate variations on the theme also look at the soil conditions. Higher ground motions are likely to be experienced on a soft swamp compared to a hard rock site. The standard seismic hazard calculations become adjusted upwards when postulating
84:
in 1968 and, depending on their level of importance and use, can be quite complex. The regional geology and seismology setting is first examined for sources and patterns of earthquake occurrence, both
449:
387:
77:
Maximum
Credible Earthquake incorporated in the design of larger buildings and civil infrastructure like dams or bridges. It is important to clarify which MCE is being discussed.
121:), etc. Finally, the calculations require formulae that give the required hazard indicators for a given earthquake size and distance. For example, some districts prefer to use
69:
and determining insurance rates. The seismic hazard studies also may generate two standard measures of anticipated ground motion, both confusingly abbreviated MCE; the simpler
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214:. For parts of the US, the National Seismic Hazard Mapping Project in 2008 resulted in seismic hazard maps showing peak acceleration (as a percentage of
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is illustrated as a long narrow elliptical zone of greater potential motion, like many areas along continental margins associated with the
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Each zone is given properties associated with source potential: how many earthquakes per year, the maximum size of earthquakes (
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Wang, Z. 2008. A technical note on seismic microzonation in the central United States, J. Earth Syst. Sci. 117, S2, pp. 749–756
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chance, while nuclear plants look at the 10,000 year time frame. A longer-term seismic history can be obtained through
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436:
Cornell, C.A. 1968, Engineering seismic risk analysis, Bulletin of the
Seismological Society of America, 58, 1583-1606
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248:(or a 90% chance of non-exceedance) during a 50-year time span (that corresponds to a return period of 475 years).
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McGuire, R. 2008, Probabilistic seismic hazard analysis: Early history, Earthquake Engng Struct. Dyn., 37, 329–338
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Global seismic hazard maps exist too, which similarly present the level of certain ground motions that have a 10%
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Maximum
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in steep terrain. Large area landsliding can also occur on rather gentle slopes as was seen in the
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Diagnose the impact of global earthquakes from direct and indirect eyewitnesses contributions
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Infrastructure Risk
Research Project at The University of British Columbia, Vancouver, Canada
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149:. Areas with high ground motion due to soil conditions are also often subject to
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for standard buildings, designing larger buildings and infrastructure projects,
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Surface motion map for a hypothetical earthquake on the northern portion of the
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will occur in a given geographic area, within a given window of time, and with
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106:. Zones of higher seismicity in the continental interior may be the site for
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Color-blind friendly global map of peak ground acceleration with 10%
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Calculations for determining seismic hazard were first formulated by
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intensity exceeding a given threshold. With a hazard thus estimated,
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earthquake event, depending on the variety of structures included.
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Natural
Resources Canada page on Seismic Hazard Calculations
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Earthquake Design and
Evaluation for civil Works Projects
153:. Soil failure can also occur due to earthquake-induced
362:
Acceptable Risk
Processes: Lifeline and Natural Hazards
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Baker, Jack; Bradley, Brendon; Stafford, Peter (2021).
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218:) with a 2% probability of exceedance in 50 years.
27:Earthquake probability in a specific area and time
478:Engineering and Design, Department of the Army,
133:. The results may be in the form of a ground
61:can be assessed and included in such areas as
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359:Craig Taylor and Erik VanMarcke, ed. (2002).
8:
482:. Regulation No. 1110-2-1806, 31 July 1995
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1902:
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38:and its presumed northern extension, the
571:Global Seismic Hazard Assessment Program
185:Map of peak ground acceleration with 2%
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2164:Earthquake and seismic risk mitigation
417:: CS1 maint: archived copy as title (
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7:
503:United States Bureau of Reclamation
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626:Offshore geotechnical engineering
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310:Seismic Hazard and Risk Analysis
151:soil failure due to liquefaction
313:. Cambridge University Press.
1:
1276:Mechanically stabilized earth
2113:Potentially hazardous object
1028:Hydraulic conductivity tests
480:U.S. Army Corps of Engineers
268:Mitigation of seismic motion
1589:Stress distribution in soil
515:"Maximum design earthquake"
492:Maximum credible earthquake
365:. Reston, VA: ASCE, TCLEE.
49:is the probability that an
18:Maximum credible earthquake
2180:
739:Pore pressure measurement
240:Global seismic hazard maps
198:Some maps released by the
147:characteristic earthquakes
112:1812 New Madrid earthquake
1492:Preconsolidation pressure
887:Standard penetration test
623:
246:probability of exceedance
233:probability of exceedance
210:in 50 years, measured in
208:probability of exceedance
187:probability of exceedance
988:California bearing ratio
786:Rotary-pressure sounding
617:Geotechnical engineering
423:Earthquake Definitions,
212:Metre per second squared
204:peak ground acceleration
40:Rodgers Creek Fault Zone
1408:Geosynthetic clay liner
1383:Expanded clay aggregate
1003:Proctor compaction test
944:Crosshole sonic logging
930:Nuclear densometer test
687:Geo-electrical sounding
425:Oregon State University
1671:Earthquake engineering
1482:Lateral earth pressure
1107:Hydraulic conductivity
958:Wave equation analysis
937:Exploration geophysics
829:Deformation monitoring
798:Rotary weight sounding
263:Earthquake engineering
236:
194:US seismic hazard maps
190:
159:Good Friday earthquake
108:intraplate earthquakes
42:
849:Settlement recordings
774:Rock control drilling
675:Cone penetration test
230:
184:
33:
1711:Agricultural science
1413:Cellular confinement
104:Pacific ring of fire
1603:Numerical analysis
1487:Overburden pressure
1477:Pore water pressure
1257:Shoring structures
1132:Reynolds' dilatancy
1033:Water content tests
1018:Triaxial shear test
978:Soil classification
951:Pile integrity test
283:Seismic performance
1764:list by death toll
1578:Slab stabilisation
1558:Stability analysis
497:2007-12-25 at the
452:2009-02-27 at the
346:2008-06-02 at the
237:
191:
165:, March 28, 1964.
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36:Hayward Fault Zone
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1760:Natural disasters
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1179:
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993:Direct shear test
699:Permeability test
540:"Temblor website"
288:Vibration control
163:Anchorage, Alaska
135:response spectrum
123:peak acceleration
119:maximum magnitude
100:San Andreas Fault
67:land use planning
16:(Redirected from
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2060:Tropical cyclone
2054:Tornado outbreak
1976:
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1856:Pyroclastic flow
1848:Volcano eruption
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1303:Land development
1198:Natural features
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557:1233-1239, 2003.
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517:. Archived from
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393:. Archived from
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258:C. Allin Cornell
139:seismic analysis
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1676:Geomorphology
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1520:Consolidation
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1515:Frost heaving
1513:
1511:
1508:
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1499:
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1399:
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1393:Geosynthetics
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1388:Crushed stone
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1381:
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1371:
1369:
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1343:Cut-and-cover
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1326:
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1128:
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1112:Water content
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836:
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831:
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827:
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815:
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811:
810:Sample series
807:
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664:
660:
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649:
644:
641:
635:
634:Investigation
631:
627:
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618:
611:
606:
604:
599:
597:
592:
591:
588:
582:
579:
577:
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553:
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545:
541:
535:
532:
521:on 2007-12-25
520:
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466:
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429:
426:
420:
414:
400:on 2012-03-30
396:
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374:
372:9780784406236
368:
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320:9781108425056
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126:
124:
120:
115:
113:
109:
105:
101:
96:
92:
88:
83:
78:
76:
75:deterministic
72:
71:probabilistic
68:
64:
60:
56:
55:ground motion
52:
48:
41:
37:
32:
19:
2118:Impact event
2106:Astronomical
2040:Thunderstorm
2035:Bomb cyclone
1899:Hydrological
1868:Volcanic ash
1833:Seismic risk
1827:
1781:Mass wasting
1696:Biogeography
1691:Hydrogeology
1681:Soil science
1661:Geochemistry
1539:
1420:Infiltration
1348:Cut and fill
1291:Soil nailing
1157:Permeability
1122:Bulk density
839:Inclinometer
762:Ram sounding
647:
552:
544:Temblor, Inc
543:
534:
523:. Retrieved
519:the original
509:
487:
471:
460:
442:
431:
402:. Retrieved
395:the original
381:
361:
354:
336:
324:. Retrieved
309:
302:
273:Neotectonics
243:
220:
197:
176:
172:
143:
127:
116:
79:
46:
44:
2133:Solar flare
2019:Megadrought
1979:Temperature
1952:Megatsunami
1931:Storm surge
1926:Flash flood
1804:Debris flow
1706:Archaeology
1430:Foundations
1403:Geomembrane
1286:Slurry wall
1225:Water table
1189:Interaction
1185:Structures
1172:Sensitivity
969:Laboratory
326:January 14,
235:in 50 years
206:with a 10%
189:in 50 years
137:for use in
95:seismometer
1814:Earthquake
1772:Geological
1563:Mitigation
1545:Shear wave
1530:Earthquake
1525:Compaction
1510:Permafrost
1501:Phenomena/
1398:Geotextile
1323:Embankment
1313:Excavation
1250:Earthworks
1210:Vegetation
1205:Topography
1127:Thixotropy
1117:Void ratio
1100:Properties
998:Hydrometer
743:Piezometer
663:Core drill
525:2011-10-06
404:2011-10-06
294:References
155:landslides
51:earthquake
2143:Hypernova
2138:Supernova
2086:Firestorm
2001:Heat wave
1996:Ice storm
1991:Cold wave
1794:Avalanche
1789:Landslide
1686:Hydrology
1666:Petrology
1554:analysis
1552:Landslide
1457:Mechanics
1368:Track bed
1353:Fill dirt
1338:Terracing
911:Trial pit
726:Statnamic
711:Load test
2158:Category
2093:ARkStorm
2081:Wildfire
1986:Blizzard
1886:Sinkhole
1716:Agrology
1605:software
1503:problems
1333:Causeway
1308:Landfill
1235:Subgrade
1152:Porosity
1147:Cohesion
495:Archived
450:Archived
413:cite web
344:Archived
252:See also
87:in depth
2076:Derecho
2050:Tornado
2011:Drought
1947:Tsunami
1799:Mudflow
1656:Geology
1628:SVSlope
1438:Shallow
1358:Grading
1296:Tieback
1240:Subsoil
1230:Bedrock
1220:Topsoil
1215:Terrain
1008:R-value
971:testing
721:Dynamic
648:in situ
646:Field (
222:Temblor
216:gravity
1638:Plaxis
1633:UTEXAS
1623:SVFlux
1613:SEEP2D
1465:Forces
1318:Trench
1266:Gabion
1076:Gravel
716:Static
369:
317:
2069:Other
1940:Other
1907:Flood
1861:Lahar
1618:STABL
1091:Loess
1054:Types
398:(PDF)
391:(PDF)
93:from
2044:Hail
1912:List
1819:List
1443:Deep
1086:Loam
1081:Peat
1071:Sand
1066:Silt
1061:Clay
1046:Soil
748:Well
419:link
367:ISBN
328:2021
315:ISBN
200:USGS
169:MCEs
89:and
59:risk
1328:Cut
637:and
161:in
2160::
1762:–
1587:*
542:.
501:,
415:}}
411:{{
141:.
45:A
2056:)
2052:(
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2042:(
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1910:(
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1817:(
1752:e
1745:t
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1191:)
1187:(
650:)
609:e
602:t
595:v
546:.
528:.
421:)
407:.
385:[
375:.
330:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
