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        <TitleTxt>TA MANAGER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JERRY CARTER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KENT ANDERSON</PersonNm>
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      <Form990PartVIISectionAGrp>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KATRIN HAFNER</PersonNm>
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      <Form990PartVIISectionAGrp>
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      <Form990PartVIISectionAGrp>
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        <ManagementAndGeneralAmt>41085</ManagementAndGeneralAmt>
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        <TotalAmt>75644</TotalAmt>
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        <ProgramServicesAmt>27382</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>EQUIPMENT SUPPLIES</Desc>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
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      <AllOtherExpensesGrp>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>24650</EOYAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
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      <FederalGrantAuditPerformedInd>1</FederalGrantAuditPerformedInd>
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    <IRS990ScheduleB documentId="RetDoc1234500001">
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        </ContributorBusinessName>
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        <CurrentYearAmt>1000000</CurrentYearAmt>
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        <CurrentYearAmt>84000</CurrentYearAmt>
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    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
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      </LeaseholdImprovementsGrp>
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      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED RENT</Desc>
        <Amt>157470</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>OTHER LIABILITIES</Desc>
        <Amt>10899</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>168369</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueSubtotalAmt>20969611</RevenueSubtotalAmt>
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      <TotalRevenuePerForm990Amt>20991720</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>21002852</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>21002852</ExpensesSubtotalAmt>
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      <ExpensesNotRptFinclStmtAmt>22109</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>21024961</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL FOOTNOTE IN REGARD TO FIN 48 (ASC 740) IRIS EVALUATES UNCERTAINTY IN INCOME TAX POSITIONS BASED ON A MORE-LIKELY-THAN-NOT RECOGNITION STANDARD. IF THAT THRESHOLD IS MET, THE TAX POSITION IS THEN MEASURED AT THE LARGEST AMOUNT THAT IS GREATER THAN 50% LIKELY OF BEING REALIZED UPON ULTIMATE SETTLEMENT. AS OF JUNE 30, 2021 AND 2020, THERE ARE NO ACCRUALS FOR UNCERTAIN TAX POSITIONS. IF APPLICABLE, IRIS RECORDS INTEREST AND PENALTIES AS A COMPONENT OF INCOME TAX EXPENSE. TAX YEARS FROM 2017 THROUGH THE CURRENT YEAR REMAIN OPEN FOR EXAMINATION BY TAX AUTHORITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>5</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>TRANSPORTABLE ARRAY</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>27263</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>EUROPE (INCLUDING ICELAND AND GREENLAND)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>TELEMETRY</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>1507</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>RUSSIA AND THE NEWLY INDEPENDENT STATES</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS IN THE REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>31300</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>5</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>5</TotalEmployeeCnt>
      <SubtotalSpentAmt>60070</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>60070</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>RUSSIA AND THE NEWLY INDEPENDENT STATES</RegionTxt>
        <PurposeOfGrantTxt>TRANSMIT DATA TO IRIS DMC</PurposeOfGrantTxt>
        <CashGrantAmt>31300</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>0</Total501c3OrgCnt>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROGRAM MANAGERS AND THEIR COMMITTEES EVALUATE SUBAWARDEE PROGRESS AND ANNUAL FUNDING RECOMMENDATIONS. THE BUSINESS OFFICE REVIEWS SUBAWARD INVOICES TO ENSURE COMPLIANCE WITH FINANCIAL AND AWARD TERMS AND CONDITIONS. PROGRAM MANAGERS MONITOR SUBAWARDS TO ENSURE THEY ARE ACCOMPLISHING THEIR PROGRAM GOALS AND OBJECTIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>COLUMBIA UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>254 ENGINEERING TERRACE</AddressLine1Txt>
          <CityNm>PALISADES</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10027</ZIPCd>
        </USAddress>
        <RecipientEIN>135598093</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>11510</CashGrantAmt>
        <PurposeOfGrantTxt>OPERATION OF CONTINUOUS GNSS STATIONS IN RUSSIA</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>NM INSTITUTE OF MINING &amp; TECH</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>801 LEROY PL</AddressLine1Txt>
          <CityNm>SOCORRO</CityNm>
          <StateAbbreviationCd>NM</StateAbbreviationCd>
          <ZIPCd>87801</ZIPCd>
        </USAddress>
        <RecipientEIN>856000411</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>4018422</CashGrantAmt>
        <PurposeOfGrantTxt>OPERATIONS OF THE IRIS/PASSCAL INSTRUMENT CENTER</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>OREGON STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>312 KERR ADMINISTRATION BLDG</AddressLine1Txt>
          <CityNm>CORVALLIS</CityNm>
          <StateAbbreviationCd>OR</StateAbbreviationCd>
          <ZIPCd>97331</ZIPCd>
        </USAddress>
        <RecipientEIN>481278540</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>322823</CashGrantAmt>
        <PurposeOfGrantTxt>MAGNETOTELLURICS PROGRAM</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WASHINGTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1100 NE 45TH ST</AddressLine1Txt>
          <CityNm>SEATTLE</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98105</ZIPCd>
        </USAddress>
        <RecipientEIN>916001537</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>38476</CashGrantAmt>
        <PurposeOfGrantTxt>GEOSPATIAL WEB-BASED SEISMIC NETWORK FUNCTIONAL PERFORMANCE</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIV OF CALIFORNIA SAN DIEGO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>8622 DISCOVERY WAY</AddressLine1Txt>
          <CityNm>LA JOLLA</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92037</ZIPCd>
        </USAddress>
        <RecipientEIN>956006144</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>3673497</CashGrantAmt>
        <PurposeOfGrantTxt>GLOBAL SEISMOGRAPHIC NETWORK PROGRAM; USARRAY NETWORK FACILITY OPERATION AND MAINTENANCE; ARRAY NETWORK FACILITY-METADATA</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIV OF TEXAS EL PASO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>500 WEST UNIVERSITY AVENUE</AddressLine1Txt>
          <CityNm>EL PASO</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77902</ZIPCd>
        </USAddress>
        <RecipientEIN>746000813</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>260925</CashGrantAmt>
        <PurposeOfGrantTxt>PROGRAM FOR ARRAY SEISMIC STUDIES OF THE CONTINENTAL LITHOSPHERE</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AMERICAN GEOSCIENCES INSTITUTE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4220 KING STREET</AddressLine1Txt>
          <CityNm>ALEXANDRIA</CityNm>
          <StateAbbreviationCd>VA</StateAbbreviationCd>
          <ZIPCd>22302</ZIPCd>
        </USAddress>
        <RecipientEIN>520786946</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>7164</CashGrantAmt>
        <PurposeOfGrantTxt>ONLINE MODULE FOR GEOSCIENCE CAREER EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CARLETON COLLEGE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ONE NORTH COLLEGE STREET</AddressLine1Txt>
          <CityNm>NORTHFIELD</CityNm>
          <StateAbbreviationCd>MN</StateAbbreviationCd>
          <ZIPCd>55057</ZIPCd>
        </USAddress>
        <RecipientEIN>410694747</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>18930</CashGrantAmt>
        <PurposeOfGrantTxt>SERC</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>RUTGERS UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>249 UNIVERSITY AVENUE</AddressLine1Txt>
          <CityNm>NEWARK</CityNm>
          <StateAbbreviationCd>NJ</StateAbbreviationCd>
          <ZIPCd>07102</ZIPCd>
        </USAddress>
        <RecipientEIN>226001086</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>14428</CashGrantAmt>
        <PurposeOfGrantTxt>URBAN GEOSYSTEMS COURSE</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF SOUTH FLORIDA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4202 E FOWLER AVE</AddressLine1Txt>
          <CityNm>TAMPA</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>33620</ZIPCd>
        </USAddress>
        <RecipientEIN>593102112</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>7326</CashGrantAmt>
        <PurposeOfGrantTxt>URBAN GEOSYSTEMS COURSE</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WYOMING</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1000 EAST UNIVERSITY AVENUE</AddressLine1Txt>
          <CityNm>LARAMIE</CityNm>
          <StateAbbreviationCd>WY</StateAbbreviationCd>
          <ZIPCd>82071</ZIPCd>
        </USAddress>
        <RecipientEIN>836000331</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>20363</CashGrantAmt>
        <PurposeOfGrantTxt>WORKFORCE AND DIVERSITY INITIATIVE</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>RECON LLC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>481 WEST ARCTIC AVENUE</AddressLine1Txt>
          <CityNm>PALMER</CityNm>
          <StateAbbreviationCd>AK</StateAbbreviationCd>
          <ZIPCd>99645</ZIPCd>
        </USAddress>
        <RecipientEIN>753090858</RecipientEIN>
        <CashGrantAmt>892837</CashGrantAmt>
        <PurposeOfGrantTxt>TA RECONNAISSANCE AND STATION DEPLOYMENT SUPPORT IN ALASKA</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>LAWERENCE LIVERMORE NATIONAL LABORATORY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>7000 EAST AVENUE</AddressLine1Txt>
          <CityNm>LIVERMORE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94550</ZIPCd>
        </USAddress>
        <RecipientEIN>205624386</RecipientEIN>
        <CashGrantAmt>35000</CashGrantAmt>
        <PurposeOfGrantTxt>ONGOING OPERATIONS AND MAINTENANCE OF QC FEEDBACK OF IRIS ADC</PurposeOfGrantTxt>
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      <Total501c3OrgCnt>11</Total501c3OrgCnt>
      <TotalOtherOrgCnt>2</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROGRAM MANAGERS AND THEIR COMMITTEES EVALUATE SUBAWARDEE PROGRESS AND ANNUAL FUNDING RECOMMENDATIONS. THE BUSINESS OFFICE REVIEWS SUBAWARD INVOICES TO ENSURE COMPLIANCE WITH FINANCIAL AND AWARD TERMS AND CONDITIONS. PROGRAM MANAGERS MONITOR SUBAWARDS TO ENSURE THEY ARE ACCOMPLISHING THEIR PROGRAM GOALS AND OBJECTIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
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      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
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        <DeferredCompensationFlngOrgAmt>22428</DeferredCompensationFlngOrgAmt>
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        <TotalCompensationFilingOrgAmt>297686</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROBERT DETRICK PRESIDENT</PersonNm>
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        <TotalCompensationFilingOrgAmt>241561</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JERRY CARTER</PersonNm>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>2949</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>16841</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>14481</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>220672</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROBERT BUSBY</PersonNm>
        <TitleTxt>TA MANAGER</TitleTxt>
        <BaseCompensationFilingOrgAmt>189016</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>2561</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>16989</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10869</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>219435</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>888</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>16707</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>10483</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>210716</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>2573</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>15122</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>23625</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>203179</TotalCompensationFilingOrgAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KENT ANDERSON</PersonNm>
        <TitleTxt>PORTABLE PROGRAM MANAGER</TitleTxt>
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        <PersonNm>RICHARD BENSON</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATRIN HAFNER</PersonNm>
        <TitleTxt>GSN PROGRAM MANAGER</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CHAD TRABANT</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROBIN MORRIS</PersonNm>
        <TitleTxt>PROJECT COST CONTROLLER</TitleTxt>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>EDUCATIONAL AND NOT-FOR-PROFIT INSTITUTIONS CHARTERED IN THE UNITED STATES, WITH A MAJOR COMMITMENT TO RESEARCH IN SEISMOLOGY AND RELATED FIELDS, MAY BECOME VOTING MEMBERS. RESEARCH INSTITUTIONS AND OTHER NOT-FOR-PROFIT ORGANIZATIONS BOTH INSIDE AND OUTSIDE THE UNITED STATES ENGAGED IN SEIMOLOGICAL RESEARCH AND DEVELOPMENT, WHICH MAY NOT OTHERWISE QUALIFY FOR IRIS MEMBERSHIP, MAY BE ELECTED EDUCATIONAL AFFILIATES, US AFFILIATES, OR FOREIGN AFFILIATES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>EDUCATIONAL AND NOT-FOR-PROFIT INSTITUTIONS CHARTERED IN THE UNITED STATES, WITH A MAJOR COMMITMENT TO RESEARCH IN SEISMOLOGY AND RELATED FIELDS, MAY BECOME VOTING MEMBERS. REPRESENTATIVES OF EACH MEMBER INSTITUTION ARE ELIGIBLE TO VOTE FOR THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CFO WILL SUBMIT THE DRAFT FORM 990 TO THE IRIS BUDGET &amp; FINANCE SUBCOMMITTEE AND THE BOARD OF DIRECTORS FOR REVIEW AND QUESTIONS BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, COMMITTEE MEMBERS AND KEY EMPLOYEES ARE REQUIRED TO COMPLETE CONFLICT OF INTEREST FORMS. DISCLOSURES ARE PROVIDED TO COMMITTEE CHAIRS AND THE PRESIDENT. THE PRESIDENT'S ASSISTANT WORKS WITH SENIOR MANAGEMENT TO MONITOR AND FOLLOW UP ON MISSING FORMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS REVIEWS AND APPROVES THE PRESIDENT'S SALARY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS ARE AVAILABLE ONLINE THROUGH THE IRIS WEBSITE. THE IRIS CONFLICT OF INTEREST POLICY IS NOT GENERALLY MADE AVAILABLE TO THE PUBLIC, BUT IS AVAILABLE UPON REQUEST. IRIS FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
