现已上线！2025 年 Telegram 研究 — 年度关键洞察 
UPSC GEOGRAPHY
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This channel provides notes from different major books like D.R. khullar, G.C leong etc No copyright material allowed. Queries - @Upscgeographybot
显示更多📈 Telegram 频道 UPSC GEOGRAPHY 的分析概览
频道 UPSC GEOGRAPHY (@upsc_geography_notes_optional) 英语 语言赛道中的 是活跃参与者。目前社区聚集了 67 378 名订阅者，在 教育 类别中位列第 2 445，并在 印度 地区排名第 5 066 位。
📊 受众指标与增长动态
自 невідомо 创建以来，项目保持高速增长，吸引了 67 378 名订阅者。
根据 14 六月, 2026 的最新数据，频道保持稳定运转。过去 30 天订阅人数变化为 -1 186，过去 24 小时变化为 -55，整体触达仍然可观。
- 认证状态： 未认证
- 互动率 (ER)： 平均受众互动率为 4.22%。内容发布后 24 小时内通常能获得 2.76% 的反应，占订阅者总量。
- 帖子覆盖： 每篇帖子平均可获得 2 844 次浏览，首日通常累积 1 863 次浏览。
- 互动与反馈： 受众积极参与，单帖平均反应数为 0。
- 主题关注点： 内容集中在 prelim, hindu, sanctuary, upsc, polity 等核心主题上。
📝 描述与内容策略
作者将该频道定位为表达主观观点的平台：
“This channel provides notes from different major books like D.R. khullar, G.C leong etc
No copyright material allowed.
Queries - @Upscgeographybot”
凭借高频更新（最新数据采集于 15 六月, 2026），频道始终保持新鲜度与高覆盖。分析显示受众积极互动，使其成为 教育 类别中的关键影响点。
67 378
订阅者
-5524 小时
-2867 天
-1 18630 天
帖子存档
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■ ELEMENTS OF EARTH
#Interiorofearth
1. Iron – 34.6%
2. Oxygen – 29.5 %
3. Silicon – 15.2 %
4. Magnesium – 12.7%
5. Nickel – 2.4 %
6. Sulphur – 1.9%
7. Titanium – 0.05%
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■ MOST ABUNDANT ELEMENTS OF THE EARTH'S CRUST
#Interiorofearth
ELEMENT - APPROXIMATE % BY WEIGHT
◇ Oxygen - 46.6%
◇ Silicon (Si) - 27.7%
◇ Aluminium (Al) - 8.1%
◇ Iron - 5.0%
◇ Calcium (Ca) - 3.6%
◇ Sodium (Na) - 2.8%
◇ Potassium (K) - 2.6%
◇ Magnesium (Mg) - 1.5%
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■ INTERNAL STRUCTURE OF THE EARTH.
#interiorofearth
◇ The interior of the earth is made up of several concentric layers of which the crust, the mantle, the outer core and the inner core are significant because of their unique physical and chemical properties.
◇ The crust is a silicate solid, the mantle is a viscous molten rock, the outer core is a viscous liquid, and the inner core is a dense solid.
◇ Mechanically, the earth’s layers can be divided into lithosphere, asthenosphere, mesospheric mantle (part of the Earth's mantle below the lithosphere and the asthenosphere), outer core, and inner core.
◇ Chemically, Earth can be divided into the crust, upper mantle, lower mantle, outer core, and inner core.
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■ SURFACE WAVES ( L-WAVES)
#interiorofearth
◇ The body waves interact with the surface rocks and generate new set of waves called surface waves (long or L-waves). These waves move only along the surface.
◇ Surface Waves are also called long period waves because of their long wavelength.
◇ They are low-frequency transverse waves (shear waves).
◇ They develop in the immediate neighbourhood of the epicentre and affect only the surface of the earth and die out at smaller depth.
◇ They lose energy more slowly with distance than the body waves because they travel only across the surface unlike the body waves which travel in all directions.
◇ Particle motion of surface waves (amplitude) is larger than that of body waves, so surface waves are the most destructive among the earthquake waves.
◇ They are slowest among the earthquake waves and are recorded last on the seismograph.
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■ SECONDARY WAVES (S-WAVES)
#Interiorofearth
◇ They are recorded second on the seismograph or S-waves are also called as transverse waves or shear waves or distortional waves.
◇ They are analogous to water ripples or light waves.
◇ Transverse waves or shear waves mean that the direction of vibrations of the particles in the medium is perpendicular to the direction of propagation of the wave. Hence, they create troughs and crests in the material through which they pass (they distort the medium).
◇ S-waves arrive at the surface after the P-waves.
◇ These waves are of high frequency and possess slightly higher destructive power compared to P-waves.
◇ The trembling on the earth’s surface caused due to these waves is from side to side (horizontal).
◇ S-waves cannot pass through fluids (liquids and gases) as fluids do not support shear stresses.
◇ They travel at varying velocities (proportional to shear strength) through the solid part of the Earth.
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