site seismic hazards report - sp3 risk
TRANSCRIPT
SITESEISMICHAZARDSREPORT
ReportGeneratedfor:
333CityBlvdW
Orange,CA92868
Lat/Long:33.7871155°,-117.8936981°
Date:
April22,2020
ReportGeneratedby:
TheSiteHazardsModuleofthe
SeismicPerformancePredictionProgram(SP3)
Producedfor:
BoscoInc
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1. Introduction
2. SiteLocation
3. SiteSoilClassificationBasedonTopography
4. SoilBoringDataforNearbySites
DataSource#1-U.S.GeologicalSurveyVs30BoringDataforNearbySites
5. Liquefaction
DataSource#1-CaliforniaStateLiquefaction
6. Landslide
DataSource#1-CaliforniaStateLandslide
7. AlquistPriolo
8. Tsunami
9. NearbyFaults
DataSource#1-U.S.GeologicalSurveyFaults
10. GroundShakingDisaggregation(withFaultTable)
11. GroundShakingHazards-PGA,PGV,Sa,andMMI
12. ShakeMaps
DataSource#1-NorthridgeEarthquake-M6.7(1/17/1994)
DataSource#2-WhittierEarthquake-M5.9(10/01/1987)
GroundShakingScaleDescription
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ThisreportwasgeneratedusingSP3-SiteHazardsoftheSP3platform.Itwascreatedbyaggregatingpublicallyavailabledata
atthespecifiedsitelocationwiththegoalofeasilyunderstandingandreportingonsitehazards.Eachdatasourceiscitedand
thereportissubjecttothelimitationsandaccuracyofthosedatasources.
Address:333CityBlvdW,Orange,CA92868
Latitude:33°47'13"N(33.7871155°)
Longitude:117°53'37"W(-117.8936981°)
Thefollowingsoiltypesareestimatedbasedonthetypographyofyoursitelocation.
Theestimateofsoilforthissiteisasfollows:
Vs30=224m/s
SoilClass:D/E[165-225]
Source:U.S.GeologicSurvey,GlobalVs30Model[https://earthquake.usgs.gov/data/vs30]
Thesoilclassbinsusedforassigningsoiltypesareasfollows:
SiteClass SiteClassBasedonVS30*(m/sec)
ASCE7SiteClassDefinitionVs30(m/sec)
A HardRock ≥1695 ≥1500A/B A/BBoundary 1315-1695 --B Rock 945-1315 760-1500B/C B/CBoundary 660-945 --
C Verydensesoilandsoftrock 460-660 360-760
C/D C/DBoundary 315-460 --D Stiffsoil 225-315 180-360D/E D/EBoundary 165-225 --E Softclaysoil <165 <180*Non-overlappingrangesforknownVs30todefineSiteClassasproposedbyBozornia&Bertero,2006[https://www.crcpress.com/Earthquake-Engineering-From-Engineering-Seismology-to-Performance-Based/Bozorgnia-Bertero/p/book/9780849314391]
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Thefollowingmapprovidesanyavailablesoilboringdata(withVs30estimates)fornearbysites.Thiscomesfromadatabaseof
Vs30boringdatacompiledbytheU.S.GeologicalSurveyandothergovernmentalagenciesfor3,020sitesintheUnitedStates.
Source:U.S.GeologicalSurvey[https://earthquake.usgs.gov/data/vs30/us/]
DataSource#1-U.S.GeologicalSurveyVs30BoringDataforNearbySites
<180
180-240
240-300
300-360
360-490
490-620
620-760
≥760
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Liquefactionareasaredelineatedwithrespecttotheunderlyinggeologicalmaterialsinaparticulararea.Thesemapsare
meanttoprovideinformationonwhereliquefactionmayoccurinafutureearthquake(butnotnecessarilythatitwilloccurfor
thisspecificsite).Thismapprovidesapre-screeningapproachforliquefactionpotential,butasite-specificsoilassessment
wouldbeneededifamorepreciseunderstandingofliquefactionpotentialisdesired.
Source:CaliforniaGeologicalSurvey[http://maps.conservation.ca.gov/cgs/informationwarehouse]
DataSource#1-CaliforniaStateLiquefaction
NoLiquefactionHazard
LiquefactionHazard
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Landslidesusceptibilityindicatestheseverityofseismicallyinducedlandslidepotentialinanarea.
Source:CaliforniaGeologicalSurvey[http://maps.conservation.ca.gov/cgs/informationwarehouse]
DataSource#1-CaliforniaStateLandslide
LandslideHazard
NoLandslideHazard
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TheAlquist-PrioloEarthquakeFaultZoningActisaCaliforniaStatelawputintoplacetoidentifyareasthatmaybeproneto
surfacerupture.
TherewasnoAlquistPriolodatafoundinthemappedregionbelow.Thiscouldeithermeanthatthereisnoearthquakeinduced
AlquistPriolohazardorthatthisregionwasnotmapped.
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Tsunamiinundationzonesaredeterminedbymodelingagroupofmaximumconsideredtsunamievents.Itisnotedthatthese
mapsdonotmeetdisclosurerequirementsforrealestatetransactionsnorforanyotherregulatorypurpose(pleasesee
associateddisclaimersfromCaliforniaGeologicalSurvey).
TherewasnoTsunamidatafoundinthemappedregionbelow.Thiscouldeithermeanthatthereisnoearthquakeinduced
Tsunamihazardorthatthisregionwasnotmapped.
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Yearsshowninlegendrepresenttypicalreturnperiodofcharacteristicearthquakesonthefaults.
Source:U.S.GeologicalSurvey[https://earthquake.usgs.gov/hazards/qfaults/]
DataSource#1-U.S.GeologicalSurveyFaultsThismapshowsknownfaultsaroundthissite.
Lessthan150years
150-15,000years
15,000-130,000years
130,000-750,000years
750,000-1.6millionyears
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Thefollowingarethefaultsandpossiblefutureearthquakeeventsthatcontributetothe10%in50yearhazard.
FaultNameandRupture Magnitude DistancefromSite[mi] Azimuth Epsilon Percent
Contribution
UC33brAvg_FM32 7.17 14.84 -- 0.89 29.98%Compton[0] 7.24 7.91 235.79 -0.21 2.54%Richfield[1] 6.36 7.04 11.70 0.85 2.45%Elsinore(GlenIvy)rev[0] 6.53 17.69 80.51 1.98 2.09%Whittieralt2[3] 7.56 10.24 24.73 0.60 2.08%PuenteHills(CoyoteHills)[0] 7.27 7.91 347.42 0.42 1.95%SanJoaquinHills[0] 7.18 8.17 184.47 0.49 1.81%Anaheim[0] 6.62 4.15 260.33 -0.12 1.66%Newport-Inglewoodalt2[1] 7.48 9.61 216.69 0.54 1.61%SanAndreas(MojaveS)[14] 8.01 41.54 26.66 1.85 1.54%PeraltaHills[1] 7.28 4.65 21.42 0.03 1.37%PalosVerdes[7] 7.45 19.89 235.62 1.42 1.27%Chinoalt2[1] 6.87 14.66 52.22 1.36 1.14%SanJacinto(SanBernardino)[3] 8.10 39.19 55.68 1.69 1.03%
UC33brAvg_FM31 7.13 15.33 -- 0.98 29.72%Whittieralt1[4] 7.45 10.28 23.01 0.66 2.83%Compton[0] 7.20 7.91 235.79 -0.20 2.42%Elsinore(GlenIvy)rev[0] 6.54 17.69 80.51 1.97 2.06%PeraltaHills[1] 6.86 4.65 21.42 0.25 1.87%Newport-Inglewoodalt1[1] 7.44 9.67 217.37 0.55 1.78%Anaheim[0] 6.60 4.15 260.33 -0.11 1.67%Chinoalt1[2] 6.64 12.74 48.49 1.39 1.56%SanAndreas(MojaveS)[14] 8.01 41.54 26.66 1.85 1.51%SanJoaquinHills[0] 7.54 8.17 184.47 0.28 1.44%PalosVerdes[7] 7.28 19.89 235.62 1.54 1.23%SanJacinto(SanBernardino)[3] 8.10 39.19 55.68 1.68 1.06%
UC33brAvg_FM32(opt) 5.76 7.49 -- 1.10 20.28%PointSourceFinite:-117.894,33.801 5.61 3.25 -- 0.36 2.80%PointSourceFinite:-117.894,33.801 5.61 3.25 -- 0.36 2.80%PointSourceFinite:-117.894,33.873 5.68 6.46 -- 1.09 1.92%PointSourceFinite:-117.894,33.873 5.68 6.46 -- 1.09 1.92%PointSourceFinite:-117.894,33.900 5.82 7.79 -- 1.24 1.37%PointSourceFinite:-117.894,33.900 5.82 7.79 -- 1.24 1.37%
UC33brAvg_FM31(opt) 5.76 7.43 -- 1.09 20.02%PointSourceFinite:-117.894,33.801 5.61 3.25 -- 0.36 2.87%PointSourceFinite:-117.894,33.801 5.61 3.25 -- 0.36 2.87%PointSourceFinite:-117.894,33.873 5.69 6.44 -- 1.08 1.96%PointSourceFinite:-117.894,33.873 5.69 6.44 -- 1.08 1.96%PointSourceFinite:-117.894,33.900 5.81 7.81 -- 1.26 1.24%PointSourceFinite:-117.894,33.900 5.81 7.81 -- 1.26 1.24%
Source:U.S.GeologicSurvey,Dynamic:ConterminousU.S.2014(update)(v4.2.0)[https://earthquake.usgs.gov/hazards/interactive/]
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Theshakinghazardforyoursiteispresentedbelowintermsofpeakgroundacceleration(PGA)andspectralacceleration(Sa)
atperiods0.2sand1.0s.WhereavailabletheshakinghazardisprovidedfortheSiteClassspecifictothislocation(basedon
Vs30estimatedtopographysectionabove)andsiteclassesB/CandD.
TheModifiedMercalliIndex(MMI)isalsoprovidedaccordingtoTrifunac&Brady(1975)baseduponPGA.TheTrifunac&
BrandyMethodisapplicabletointensitylevelsbetweenIVandX;lowerintensitylevelsareapproximate.
Intensity ThisSite:SiteClassD/E BaselineforSiteClassB/C BaselineforSiteClassD
ExceedanceProbability
ReturnPeriod[years]
PGA[g]
Sa(T=0.2s)
[g]
Sa(T=1.0s)
[g]MMI PGA
[g]
Sa(T=0.2s)
[g]
Sa(T=1.0s)
[g]MMI PGA
[g]
Sa(T=0.2s)
[g]
Sa(T=1.0s)
[g]MMI
50%in30years 43 0.14 0.34 0.16 VII 0.09 0.20 0.06 VI 0.14 0.34 0.16 VII
50%in50years 72 0.18 0.45 0.21 VII 0.13 0.28 0.08 VII 0.18 0.45 0.21 VII
50%in75years 108 0.22 0.54 0.27 VIII 0.16 0.35 0.10 VII 0.22 0.54 0.27 VIII
50%in100years 144 0.25 0.62 0.31 VIII 0.18 0.41 0.12 VII 0.25 0.62 0.31 VIII
20%in50years 224 0.30 0.74 0.39 VIII 0.22 0.51 0.15 VIII 0.30 0.74 0.39 VIII
10%in30years 285 0.33 0.80 0.44 VIII 0.25 0.58 0.16 VIII 0.33 0.80 0.44 VIII
10%in50years 475 0.40 0.97 0.55 IX 0.32 0.73 0.21 VIII 0.40 0.97 0.55 IX
10%in75years 712 0.46 1.10 0.65 IX 0.37 0.87 0.25 VIII 0.46 1.10 0.65 IX
5%in50years 975 0.51 1.21 0.74 IX 0.42 0.99 0.29 IX 0.51 1.21 0.74 IX
3%in50years 1642 0.60 1.41 0.90 IX 0.51 1.21 0.36 IX 0.60 1.41 0.90 IX
2%in50years 2475 0.68 1.57 1.04 IX 0.59 1.42 0.42 IX 0.68 1.57 1.04 IX
1.5%in50years 3308 0.73 1.68 1.15 IX 0.66 1.57 0.47 IX 0.73 1.68 1.15 IX
1%in50years 4975 0.81 1.85 1.31 X 0.75 1.80 0.54 X 0.81 1.85 1.31 X
Source:U.S.GeologicSurvey,Dynamic:ConterminousU.S.2014(update)(v4.2.0)[https://earthquake.usgs.gov/hazards/interactive/]
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Shakemapspresenttheintensityofseismicshakingovergeographicregionsduringsignificantearthquakes.Thefollowing
map(s)provideinformationontheintensityofshakingdemandfrompastseismiceventsthatarepertinenttothissite.Note
thatthesemapsestimatetheintensityofshakingbetweenobserveddatapointsandthataspecificsitemayhaveexperienceda
differentlevelofshakingintheevent(s)presentedbelow.
Source:U.S.GeologicalSurvey[https://earthquake.usgs.gov/earthquakes/eventpage/ci3144585#shakemap]
MappedValuesatSiteLocation:
MMI:5.8
PGA:0.12(g)
PGV:10(cm/s)
Sa(T=0.3s):0.28(g)
Sa(T=1.0s):0.12(g)
DataSource#1-NorthridgeEarthquake-M6.7(1/17/1994)Basedonthemapbelow,thissiteislocatedinanMMIVIZoneforthisevent.
I
II
III
IV
V
VI
VII
VIII
IX
X
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Source:U.S.GeologicalSurvey[https://earthquake.usgs.gov/earthquakes/eventpage/ci731691#shakemap]
MappedValuesatSiteLocation:
MMI:5.8
PGA:0.12(g)
PGV:10(cm/s)
Sa(T=0.3s):0.28(g)
Sa(T=1.0s):0.08(g)
DataSource#2-WhittierEarthquake-M5.9(10/01/1987)Basedonthemapbelow,thissiteislocatedinanMMIVIZoneforthisevent.
I
II
III
IV
V
VI
VII
VIII
IX
X
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GroundShakingScaleDescriptions
Intensity Shaking Description/DamageI Notfelt Notfeltexceptbyaveryfewunderespeciallyfavorableconditions.II Weak Feltonlybyafewpersonsatrest,especiallyonupperfloorsofbuildings.
III WeakFeltquitenoticeablybypersonsindoors,especiallyonupperfloorsofbuildings.Manypeopledonotrecognizeitasanearthquake.Standingmotorcarsmayrockslightly.Vibrationssimilartothepassingofatruck.Durationestimated.
IV LightFeltindoorsbymany,outdoorsbyfewduringtheday.Atnight,someawakened.Dishes,windows,doorsdisturbed;wallsmakecrackingsound.Sensationlikeheavytruckstrikingbuilding.Standingmotorcarsrockednoticeably.
V Moderate Feltbynearlyeveryone;manyawakened.Somedishes,windowsbroken.Unstableobjectsoverturned.Pendulumclocksmaystop.
VI Strong Feltbyall,manyfrightened.Someheavyfurnituremoved;afewinstancesoffallenplaster.Damageslight.
VII VeryStrong
Damagenegligibleinbuildingsofgooddesignandconstruction;slighttomoderateinwell-builtordinarystructures;considerabledamageinpoorlybuiltorbadlydesignedstructures;somechimneysbroken.
VIII SevereDamageslightinspeciallydesignedstructures;considerabledamageinordinarysubstantialbuildingswithpartialcollapse.Damagegreatinpoorlybuiltstructures.Fallofchimneys,factorystacks,columns,monuments,walls.Heavyfurnitureoverturned.
IX ViolentDamageconsiderableinspeciallydesignedstructures;well-designedframestructuresthrownoutofplumb.Damagegreatinsubstantialbuildings,withpartialcollapse.Buildingsshiftedofffoundations.
X Extreme Somewell-builtwoodenstructuresdestroyed;mostmasonryandframestructuresdestroyedwithfoundations.Railsbent.
Source:U.S.GeologicSurvey
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