Question Q2GS1GS1

To what extent does seismic investigation contribute to our understanding of the Earth's subsurface geology? Analyze its significance in detail.

Introduction

Earth's interior surface is concentric layered arrangement & could be understood using seismic investigation.

14 words

Main Body

Earth's interior surface is concentric layered arrangement & could be understood using seismic investigation.

Seismic Investigation & Interior Structure:

1Shadow Zones: of P and S wave (body waves) reveal properties of inner materials.

[Diagram shown with P-wave shadow and S-wave shadow zones marked at 103°, 103°, and 142°]

P-wave shadow zone / S-wave shadow zone

2Change in velocity of waves reveal changing density of interior

3Refraction of wave: reveal about change of phase) ie for es: liquid to solid

3Refraction of wave: reveal about change of (phase) ie for es: liquid to solid

4S-wave shadow zone: S wave can't travel in liquid medium. The shadow zone confirms solidomantle & liquid outer core

5P-wave shadow zone: P-wave can travel through all mediums. It reveals solid inner core.

Significance

1Understanding magnetic field of earth (dynamo theory)

2Mineral exploration

3Early warning system development for disasters like volcano.

4Understanding other planets of solar system.

Seismic investigation has enhanced our understanding of earth and beyond and is very significant

174 words3 paragraphs

Conclusion

Seismic investigation has enhanced our understanding of earth and beyond and is very significant

14 words

Diagram

Shadow zones of P and S waves (body waves) showing angles 103° and 142° marked, illustrating P-wave shadow and S-wave shadow zone patterns

Open original scan

Page 7

Topper

Abhishek Singh

AIR 17473118689912023

Subject & Paper

GS1GS1

Topic

Important Geophysical Phenomena

Seismic Investigation and Earth Structure

Seismic waves and subsurface geology

Writing Stats

202

Total words

Paragraphs

analytical

Tone