UPSC GEOGRAPHY

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■ AURORAS #Magneticfield ◇ Aurora is the name given to the luminous glow in the upper atmosphere of the Earth which is produced by charged particles (solar wind) descending from the planet's magnetosphere. ◇ Positive ions slowly drift westward, and negative ions drift eastward, giving rise to a ring current. This current reduces the magnetic field at the Earth's surface. ◇ Some of these particles penetrate the ionosphere and collide with the atoms there. ◇ This results in an excitation of the oxygen and nitrogen molecular electrons. The molecules get back to their original state by emitting photons of light which are the aurorae. ◇ The charged particles follow magnetic field lines which are oriented in and out of our planet and its atmosphere near the magnetic poles. Therefore, aurorae mostly are seen to occur at high latitudes. ▪︎JOIN - @upsc_geography_notes

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🚨🚨GEO 300+ GEOGRAPHY OPTIONAL TEST SERIES SCHEDULE- MAINS 2025

🚨🚨Last opportunity to join Geography Optional Test series Mains 25- (GEO 300+) cum Test Series Main's 25 Program!! Orientation CLASS CLASS 1 Component 1: ☘️ Revise Syllabus- 300+ Qs & Hand written model answers ☘️ Based upon PYQ & Current Affair Themes ☘️ 50+ Enrichment Sessions ☘️ Integration of Thinkers, Case Studies etc Component 2: 👉10 Sectional & 4 Full Length Tests 👉 Handwritten Model Answers 👉 Personalised Evaluation by Shikha Ma’am. 👉 Guaranteed Evaluation in 3-4 Days 👉 Daily offline mentorship with Ankit.A geography topper 👉 GEOGRAPHY OPTIONAL yearly current affairs booklet 2025-26 - GEOGRAPHIKA **Students will get Topper's handwritten model answer booklets with GEO 300 + Batch For Queries, Call at 9311082312 or fill the form at https://forms.gle/dqijMWGvTa3BCU3N6 [CLICK HERE - To watch Topper's talk with AIR 67 - Farkhanda Qureshi & Shikha Ma'am]

■ PLASMASPHERE #Magneticfield ◇ Inside the magnetosphere is the plasmasphere, a region containing low-energy charged particles. ◇ This region begins at the height of 60 km, extends up to 3 or 4 Earth radii, and includes the ionosphere. ◇ This region rotates with the Earth. ▪︎JOIN - @upsc_geography_notes

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🚨🚨GEO 300+ GEOGRAPHY OPTIONAL TEST SERIES SCHEDULE- MAINS 2025

🚨🚨Last opportunity to join Geography Optional Test series Mains 25- (GEO 300+) cum Test Series Main's 25 Program!! Orientation CLASS CLASS 1 Component 1: ☘️ Revise Syllabus- 300+ Qs & Hand written model answers ☘️ Based upon PYQ & Current Affair Themes ☘️ 50+ Enrichment Sessions ☘️ Integration of Thinkers, Case Studies etc Component 2: 👉10 Sectional & 4 Full Length Tests 👉 Handwritten Model Answers 👉 Personalised Evaluation by Shikha Ma’am. 👉 Guaranteed Evaluation in 3-4 Days 👉 Daily offline mentorship with Ankit.A geography topper 👉 GEOGRAPHY OPTIONAL yearly current affairs booklet 2025-26 - GEOGRAPHIKA **Students will get Topper's handwritten model answer booklets with GEO 300 + Batch For Queries, Call at 9311082312 or fill the form at https://forms.gle/dqijMWGvTa3BCU3N6 [CLICK HERE - To watch Topper's talk with AIR 67 - Farkhanda Qureshi & Shikha Ma'am]

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■ MAGNETOPAUSE #magneticfield ◇ Earth's magnetic field, predominantly dipolar at its surface, is distorted further out by the solar wind. ◇ The solar wind exerts a pressure. However, it is kept away by the pressure of the Earth's magnetic field. ◇ The magnetopause, the area where the pressures balance, is the boundary of the magnetosphere. ◇ Despite its name, the magnetosphere is asymmetric, with the sunward side being about 10 Earth radii out but the other side stretching out in a magnetotail that extends beyond 200 Earth radii. ▪︎JOIN - @upsc_geography_notes

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