IESO 2023 or International Earth Science Olympiad: IESO 2023 Registration will be done again by the Geological Society of India. The aim of this Olympiad is to encourage students’ interest and public awareness of Earth Science at the school level. The IESO 2023 is conducted in four stages. The students from classes 9 to 11 are eligible to apply for the Indian National Earth Science Olympiad (INESO). The application form of IESO will be available online. Candidates must pay the registration fee to complete the application process. To get more details about the IESO Application Form, eligibility criteria, exam pattern, question papers, IESO REsult, etc, read the complete article.
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IESO 2027 Latest Update as on 04 Sep 2026
Contains
Checked on 04 Sep 2026
As of 04 Sep 2026, no official notification for IESO 2027 has been released; the exam is conducted by the Geological Society of India and registration is expected to open around November 2026 based on prior-year patterns.
| Exam | IESO 2027 |
|---|---|
| Status | Official notification expected: October–November 2026 (IESO 2026 notification released in Oct 2025) |
| Next expected | Registration expected to open: November 2026 (last year: ~1 Nov 2025) |
| Official website | olympiads.hbcse.tifr.res.in |
| Last verified | 04 Sep 2026 |
As of 04 Sep 2026, no official notification, registration window, or syllabus update for IESO 2027 has been published by the conducting body, the Geological Society of India (GSI) in coordination with the Homi Bhabha Centre for Science Education (HBCSE). The IESO 2027 cycle is expected to follow the same multi-stage structure used in previous years: a national-level screening exam, an orientation-cum-selection camp, and participation in the International Earth Science Olympiad. Based on the 2026 cycle, students can tentatively expect the official notification and registration to open by October–November 2026. Students preparing for IESO 2027 should monitor the official portal at olympiads.hbcse.tifr.res.in for announcements and begin strengthening their earth science fundamentals — geology, meteorology, oceanography, and astronomy — as these form the core of the examination syllabus.
- Official notification expected: October–November 2026 (IESO 2026 notification released in Oct 2025)
- Registration expected to open: November 2026 (last year: ~1 Nov 2025)
- Registration deadline expected: December 2026 (last year: ~31 Dec 2025)
- Stage 1 (National Earth Science Olympiad) expected: January–February 2027 (last year: Feb 2026)
- Stage 2 / Orientation-cum-Selection Camp expected: April–May 2027 (last year: Apr–May 2026)
- International IESO 2027 event: exact host country and dates not yet announced; typically held in August–September
Sources: HBCSE Science Olympiads Official Portal
IESO 2023 Exam Status
The interested candidates who wish to apply for the Indian National Earth Science Olympiad must check the latest updates and IESO Exam Dates from the table given below:
| Particulars | Status |
| IESO 2023 Registration | Soon |
IESO 2023 Important Dates
The candidates must check the IESO 2023 Registration Date and other important events. The exam and application form last dates will be available here as soon as it is announced by the conducting authority. However, candidates can check the tentative dates of the IESO from the table given below:
| Important Events | Tentative dates |
| Starting Date of registration of centres | November 2023 |
| End Date of registration of centres | November 2023 |
| Starting Date of registration of students | November 2023 |
| End Date of registration of students | November 2023 |
| Date of entrance exam | December 2023 |
IESO 2023 Application Form
Major Changes This Year
No changes to IESO 2027 eligibility, syllabus, or exam pattern have been officially announced yet; the format is expected to follow the 2026 cycle.
No major change has been officially announced yet for IESO 2027. No alterations to eligibility criteria, syllabus, exam pattern, marking scheme, or application mode have been confirmed by the Geological Society of India or HBCSE as of 04 Sep 2026. Based on previous cycles, the exam is expected to retain its four-stage structure (school-level, national-level, orientation camp, international participation), with eligibility limited to Indian students in Classes 9–12 who are under 18 years of age. Any confirmed changes will be reflected in the official notification expected around October–November 2026.
The Geological Society of Indian will release the IESO Online Application Form on its website. Therefore, the candidates who are eligible for the registration can fill the online application form before the last date. In order to fill the application form, the candidates must follow the steps given below:
- Initially, the candidates will have to visit the portal of the conducting authority. However, students can also contact their respective schools to get information about INESO 2023.
- In order to fill the online form, the candidates will have to do the registration first. The IESO Registration requires details like the name, class, contact number, email ID, and Aadhar card number of the candidates.
- Now an OTP will be sent on the registered mobile number. Applicants will have to enter that OTP in order to validate the registration process.
- The login credentials will be sent to the email of the applicants.
- Then click on New User Registration. Enter the user ID and password to login.
- Once the candidates have logged in, they have to click on “Apply Now”.
- After that, the candidates must fill in all the details in the application form.
- Then upload the photograph and signature in the prescribed format.
- Once the application form is complete, the candidates will have to pay the registration fees.
- On successful completion of the application form, the candidates will receive an acknowledgement that the application has been accepted.
IESO 2023 Registration Fee
- Candidates have to pay an application fee of Rs 150/- either by cash/money order or DD.
- For offline mode, the candidates will have to pay the application fees at their respective schools and get the receipt.
IESO 2023 Eligibility Criteria
The applicants must check the IESO Eligibility Criteria before participating in the Olympiad. The minimum eligibility requirements for Indian National Earth Science Olympiad are given below:
- The applicants must be a citizen of India.
- The students studying in classes 9, 10, and 11 are eligible to apply for IESO.
- Candidates must be studying from a recognized State Board, ICSE Board, CBSE Board, or International Boards.
- The applicant should not be older than 18 years of age as of July 1st of the year of the Olympiad and must not be a university/college student while participating in IESO.
- An applicant can only be a student of secondary/ higher secondary school.
- A student who has already won a medal in a previous IESO is not eligible.
IESO 2023 Exam Pattern
The students must check the exam pattern of Indian National Earth Science Olympiad before appearing for the exam. With the help of the exam pattern, the candidates can prepare more effectively and score good marks in the Olympiad. The exam pattern of the IESO is given below:
- Mode of Examination: Offline
- Duration of Exam: The exam will be held for 90 minutes (one and a half hours).
- Exam Language: The exam will be held in the English Language.
- Type of Questions: The exam will contain MCQs (Multiple choice questions) that are objective-type questions.
- Syllabus: The exam will contain questions from the syllabus like Geosphere, Atmosphere, Hydrosphere, and Planetary Sciences.
- Number of Centres: The exam will be held in 75 centers in total.
IESO 2023 Syllabus
The Indian National Earth Science Olympiad exam is based on the syllabus as defined by the conducting authority. It is very important to check the IESO 2023 Syllabus before beginning the exam preparation. For the ease of the candidates, we have provided the important topics which can be asked in the IESO exam. The details of the IESO Syllabus is given below:
| Geo-sphere | |
| • Minerals & Rocks | • Tectonic Plates & Seismology |
| • Historical Geology | • Physical Geography |
| Astronomy | |
| • Observational Astronomy | • Earth in Solar System |
| • Introduction to Solar System | • Space Science |
| Atmosphere | |
| • Basics & Energy of the Atmosphere | • Air Pressure & Motion |
| • Moisture, Clouds & Precipitation | • Weather System & Patterns |
| Hydrosphere | |
| • Hydrography | • Tide |
| • Current | • Wave |
IESO 2023 Selection Process
The Earth Science Olympiad will follow a four-stage selection procedure. The details of all four stages are given below:
- Stage-1: National Level Entrance Test (ET) – Top 20 candidates are chosen for Training Camp.
- Stage-2: Training Camp and National Earth Science Olympiad (INESO)– The training camp of 18 days duration, will be held at university/research institution usually in May/June. After the IESO Training camp, a test will be held and the top 4 represent India in (IESO).
- Stage-3: Pre-Departure Training– Selected students then undergo another round of training before departure which will be guided by their Mentors and Team Leaders at the Geological Society of India, Bangalore.
- Stage-4: Participation in International Earth Science Olympiad– The selected team will fly to the hosting country for IESO 2023 guided by their mentors and observers.
IESO 2023 Result
- The result of the Indian National Science Olympiad will be available online mode.
- Candidates can download their IESO 2023 Result from the website of the conducting authority or from the direct link given in this article.
- The students must enter their Registration Number and Date of Birth to access the result of the Earth Science Olympiad.
- The IESO result for various stages will be announced individually.
- Only those students who qualify will be eligible to participate in the next level.
- Candidates must download and save a copy of the IESO result for any future purposes.
IESO 2023 Highlights
| IESO 2023 Particulars | IESO 2023 Details |
| Organization | International Geoscience Education Organization |
| Exam | International Earth Science Olympiad 2023 |
| Exam date | December 2023 Tentatively |
| Form mode | Online |
| Exam Level | Secondary and Senior Secondary school |
| Exam Purpose | Encourage student’s interest and public awareness in Earth Science and enhance Earth Science teaching/learning at the school level. |
| Application status | Soon |
| Official Site | geosocindia.org |
About Geological Society of India
Geological Society of India conducts the International Earth Science Olympiad (IESO) for secondary school students. The society was established on 28 May 1958, to promote the cause of advanced studies and research in all branches of Earth Systems Science. The main aim of the GSI is to promote the interest of the young school students in the subjects of Advanced Earth Studies and Research. Therefore, GSI plays a vital role in the development of Earth Science.
FAQs on IESO
Q1. Who conducts IESO 2023 exam?
Ans: The International Earth Science Olympiad 2023 is conducted by the Geological Society of India.
Q2. What is the full form of INESO?
Ans: INESO stands for Indian National Earth Science Olympiad.
Q3. What type of questions are asked in the IESO Olympiad?
Ans: The IESO questions include the topics of Advanced Earch Studies and Earth Sciences.
Q4. Can I give the ESO exam in Hindi medium?
Ans: No, the IESO exam takes place only in the English medium.
Frequently Asked Questions
When will the IESO 2027 official notification be released?
No official notification has been released as of 04 Sep 2026. Based on the previous year's pattern, it is tentatively expected in October–November 2026. Monitor olympiads.hbcse.tifr.res.in for updates.
Who is eligible to apply for IESO 2027?
Based on previous cycles, Indian students studying in Classes 9–12 who are below 18 years of age as of the international exam date are eligible. Official eligibility criteria for 2027 are yet to be confirmed.
What is the syllabus for IESO 2027?
No syllabus update has been officially announced for 2027. The exam is expected to cover earth sciences — geology, meteorology, oceanography, and astronomy — consistent with previous years and the international IESO syllabus framework.
How many stages does IESO 2027 have?
Based on previous years, IESO follows a multi-stage process: school/regional screening, a national-level exam (NESO), an orientation-cum-selection camp, and international participation. The 2027 structure is expected to be similar, pending official confirmation.
When will IESO 2027 registration open?
Registration is not yet open. Based on the 2026 cycle, it is tentatively expected to begin around November 2026. The official opening date will be announced on olympiads.hbcse.tifr.res.in.
Which body conducts IESO 2027 in India?
IESO in India is coordinated by the Homi Bhabha Centre for Science Education (HBCSE), Tata Institute of Fundamental Research, in collaboration with the Geological Society of India.
Where and when will the International IESO 2027 be held?
The host country and dates for International IESO 2027 have not been officially announced yet. Historically, the international event is held between August and September. An announcement is expected closer to mid-2027.
What should students do now to prepare for IESO 2027?
Students should begin studying NCERT earth science content, refer to previous IESO question papers available on olympiads.hbcse.tifr.res.in, and focus on geology, meteorology, oceanography, and astronomy fundamentals while awaiting the official notification.