InthisreportwedescribetheSub-SaharanAfricaGeodeticStrainRateModel1.0,whichisacontributionto theGlobalEarthquakeModelFoundation(GEM)StrainRateProject.Theobjectiveofthisworkistoimprove the latest GEM geodetic strain rate model with an updated strain rate field of sub-Saharan Africa. SubSaharan Africa encompasses the East African Rift System (EARS), the active divergent plate boundary between the Nubian and Somalian plates, which accommodates strain along the boundaries of at least 3 microplates.ThecurrentversionoftheGEMgeodeticstrainratemodelisconstrainedbypublishedgeodetic data along the EARS and includes microplates between the Nubian and Somalian plates. In this work we developedan improved strain rate field for sub-Saharan Africa that incorporates 1)anexpandedgeodetic velocity fieldwithin theNubia-Somaliaplatesystemandalong theEARS2) redefined regionsofdeforming zones guided by seismicity distribution, and 3) updated constraints on block rotations from the recent publicationofSariaetal.(2014).TheSub-SaharanAfricaGeodeticStrainRateModel1.0spanslongitudes22 to55.5andlatitudes-52to20with0.5°(longitude)by0.4°(latitude)spacing,whichincludespartorallofthe following platesand/or sub-plates: Somalia,Nubia, Rovuma, Lwandle, Victoria, Antarctica,and Arabia. For theseplates/sub-platesweassignrigidblockrotationsasboundaryconstraintsonthestrainratecalculation thatisdeterminedusingtheHainesandHoltmethodof fittingsplinestogeodeticdata foraninterpolated velocitygradienttensorfield.Wederivestrainrates,velocities,andvorticityratesfromthevelocitygradient tensorfield.FollowingtheworkofKreemeretal.2014fortheGEMgeodeticstrainratefieldwealsoprovide estimates of model uncertainties, velocities, vorticity, and strain rates in a Nubia-fixed reference frame relativetothelowermantlefora0.1°x0.1°mesh.