UPSC Exam > UPSC Videos > यूपीएससी सीएसई के लिए भूगोल (Geography) > Audio Notes: ज्वालामुखी और भूकंप
Audio Notes: ज्वालामुखी और भूकंप Video Lecture | यूपीएससी सीएसई के लिए भूगोल (Geography) - UPSC
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FAQs on Audio Notes: ज्वालामुखी और भूकंप Video Lecture - यूपीएससी सीएसई के लिए भूगोल (Geography) - UPSC
| 1. What are the main causes of volcanism? |  |
Ans. Volcanism is primarily caused by the movement of tectonic plates and the subsequent melting of rocks in the mantle. This can occur at divergent boundaries, where plates move apart, allowing magma to rise, or at convergent boundaries, where one plate is forced beneath another, leading to the melting of subducted materials. Additionally, hotspots, which are areas of intense volcanic activity not associated with plate boundaries, can also contribute to volcanism.
| 2. How do earthquakes occur in relation to volcanism? | |
Ans. Earthquakes often occur due to the movement of tectonic plates, which can also trigger volcanic activity. When magma moves through the Earth's crust, it can create pressure and stress, leading to the fracturing of rocks and the release of energy in the form of seismic waves, resulting in earthquakes. Therefore, areas with active volcanoes are frequently seismically active.
| 3. What are the different types of volcanoes and their characteristics? | |
Ans. There are three main types of volcanoes: shield volcanoes, stratovolcanoes, and cinder cone volcanoes. Shield volcanoes have broad, gentle slopes and are primarily built up by the flow of low-viscosity lava. Stratovolcanoes, or composite volcanoes, are characterized by their steep profiles and alternating layers of lava and ash, leading to explosive eruptions. Cinder cone volcanoes are the smallest type, formed from the accumulation of volcanic debris around a single vent, resulting in steep sides.
| 4. What are the effects of volcanic eruptions on the environment and human life? | |
Ans. Volcanic eruptions can have significant effects on both the environment and human life. They can produce lava flows, ash falls, and pyroclastic flows, causing destruction to landscapes and infrastructure. Ash can contaminate water supplies and affect air quality, leading to health issues. Furthermore, volcanic eruptions can disrupt climate patterns, as ash and gases released into the atmosphere can lead to temporary cooling.
| 5. How do scientists monitor volcanic activity and predict eruptions? | |
Ans. Scientists use various methods to monitor volcanic activity and predict eruptions, including seismology to detect earthquakes, gas emission measurements, and satellite imagery to observe changes in the volcano's shape. Additionally, thermal imaging can track temperature changes, while ground deformation measurements can indicate magma movement. By analyzing this data, scientists can assess the likelihood of an eruption and provide warnings to affected populations.
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Oct 12, 2025
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Video Description: Audio Notes: ज्वालामुखी और भूकंप for UPSC 2025 is part of यूपीएससी सीएसई के लिए भूगोल (Geography) preparation.
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Video Lecture & Questions for Audio Notes: ज्वालामुखी और भूकंप Video Lecture | यूपीएससी सीएसई के लिए भूगोल (Geography) - UPSC - UPSC full syllabus preparation | Free video for UPSC exam to prepare for यूपीएससी सीएसई के लिए भूगोल (Geography).
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