﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2023v5.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-09-24T11:26:39-07:00</ReturnTs>
    <TaxPeriodEndDt>2024-07-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>251397579</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Accounting Solutions</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>334 Front Street</AddressLine1Txt>
        <CityNm>Houston</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>15342</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-08-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>273244989</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>GEOPHYSICAL SOCIETY OF PITTSBURGH</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>GEOP</BusinessNameControlTxt>
      <USAddress>
        <AddressLine1Txt>1719 HATHAWAY LANE</AddressLine1Txt>
        <CityNm>PITTSBURGH</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>15241</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOEL STARR</PersonNm>
      <PersonTitleTxt>Treasurer</PersonTitleTxt>
      <SignatureDt>2024-09-24</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>LAURA SKLENKA CPA</PreparerPersonNm>
      <PTIN>P01976784</PTIN>
      <PhoneNum>7247451410</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-08-08 14:25:15Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="23017517" softwareVersionNum="2023v5.1">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.THEGSP.ORG</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>36167</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>16050</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>18055</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>1320</MembershipDuesAmt>
      <InvestmentIncomeAmt>742</InvestmentIncomeAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <TotalRevenueAmt>36167</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>10000</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>900</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>25819</OtherExpensesTotalAmt>
      <TotalExpensesAmt>36719</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-552</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>95821</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>2998</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>98267</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>95821</BOYAmt>
        <EOYAmt>98267</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>95821</BOYAmt>
        <EOYAmt>98267</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>95821</BOYAmt>
        <EOYAmt>98267</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>THE OBJECTIVE OF THIS SOCIETY WILL BE TO PROMOTE THE SCIENCE OF GEOPHYSICS AND TO PROMOTE THE FELLOWSHIP AND COOPERATION AMONG THOSE PERSONS INTERESTED IN GEOPHYSICAL METHODS AND PROBLEMS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE OBJECTIVE OF THIS SOCIETY WILL BE TO PROMOTE THE SCIENCE OF GEOPHYSICS AND TO PROMOTE THE FELLOWSHIP AND COOPERATION AMONG THOSE PERSONS INTERESTED IN GEOPHYSICAL METHODS AND PROBLEMS.</DescriptionProgramSrvcAccomTxt>
      </ProgramSrvcAccomplishmentGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SCOTT GORHAM</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JIANLI YANG</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOEL STARR</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>BILL HARBERT</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>JOEL STARR</PersonNm>
        <USAddress>
          <AddressLine1Txt>1719 HATHAWAY LANE</AddressLine1Txt>
          <CityNm>PITTSBURGH</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>15241</ZIPCd>
        </USAddress>
        <PhoneNum>4122166573</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="23017517" softwareVersionNum="2023v5.1">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>5060</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>4775</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3510</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>9250</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>17370</CurrentTaxYearAmt>
        <TotalAmt>39965</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>3095</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>320</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>16695</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>18619</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>18055</CurrentTaxYearAmt>
        <TotalAmt>56784</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>8155</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>5095</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>20205</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>27869</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>35425</CurrentTaxYearAmt>
        <TotalAmt>96749</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <PublicSupportTotal509Amt>96749</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus3YearsAmt>1020</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus1YearAmt>707</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>742</CurrentTaxYearAmt>
        <TotalAmt>2469</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <TotalAmt>0</TotalAmt>
      </Post1975UBTIGrp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus3YearsAmt>1020</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus1YearAmt>707</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>742</CurrentTaxYearAmt>
        <TotalAmt>2469</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>8155</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>6115</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>20205</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>28576</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>36167</CurrentTaxYearAmt>
        <TotalAmt>99218</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.97510</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.98360</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.02490</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.01640</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="23017517" softwareVersionNum="2023v5.1">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grants and Similar Amounts Paid In Excess of $5,000.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Class of Activity: SCHOLARSHIP | Cash Amount Given: $10000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1002</FormAndLineReferenceDesc>
        <ExplanationTxt>Office Expenses $2149</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>GOLF TOURNAMENT EXPENSES $10409</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.2</FormAndLineReferenceDesc>
        <ExplanationTxt>ABGS EXPENSES $5966</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.3</FormAndLineReferenceDesc>
        <ExplanationTxt>MEETING EXPENSES $5473</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.4</FormAndLineReferenceDesc>
        <ExplanationTxt>BANK FEES $1047</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.5</FormAndLineReferenceDesc>
        <ExplanationTxt>ADMINISTRATIVE/INVESTMENT FEES $775</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>