Geology Issue – Nature of Earthquakes Essay

Exclusively available on Available only on IvyPanda® Made by Human No AI

Earthquakes

The earth consists of four major sections: the inner core, outer core, mantle, and crust. The crust is the top-most part, but is not a single piece, rather, it is made up of several pieces, like a jig-saw puzzle. The pieces keep moving gradually, slipping past one another and colliding with each other. These pieces are referred to as tectonic plates. The points at which tectonic plates separate (plate boundaries) contain numerous faults and most earthquakes occur along the boundaries due to the numerous faults.

An earthquake originates from the rapid discharge of energy from the earth’s core that generates seismic waves. It is measured using readings from a seismometer. The energy that causes earthquakes can originate from different forms of earth movements, these are generally termed as the causes of earthquakes and are outlined below:

Naturally occurring Quakes

Earthquakes can occur naturally when tectonic plates slip or slide past one another rapidly along a fault plane. Once the plates slide past one another, continuous relative movement between the plates causes an increase in stress and hence, piles up strain energy around the two plates.

The process continues until stress energy has reached a level in which it can escape through the fault line, suddenly releasing stored energy around the plates. The trapped energy is produced as a mixture of trapped seismic waves, frictional heating of the fault line, and splitting of rocks. This energy is so intense that it causes earthquakes (Greene II & Burnley, pp. 434).

Intraplate Earthquake

These are earthquakes that do not occur on the plate boundaries, rather, they take place within the continental lithosphere. This form of earthquake is more extensive than that caused by movement of plate tectonics. All tectonic plates have interior stress zones that originate from their contact with nearby plates and sedimentary addition or removal (e.g. glaciation). These stresses may be adequate to create a weakness along existing fault planes, producing an intraplate earthquake (Nettles and Ekström, pp. 480).

Volcanic Activity

Earthquakes also occur due to volcanic activity. Such an earthquake is caused by a combination of tectonic plate movement and movement of magma in the earth’s crust. This form of earthquake can be so severe and can be a form of early warning of an impending volcanic eruption in the area.

For example, the Mount. St. Helens eruption that occurred in 1980 in Washington was preceded by severe earthquakes. Movement of magma in the earth’s crust causes violent movements and this can cause the movement of small plates and this, in turn, causes movements on the earth’s surface.

Continental Drift

Continental drift is the motion of the Earth’s tectonic plates (or planets) relative to each other. The Continental drift theory was proposed by Alfred Wegener, who proposed that nearly 200 million years ago, a supercontinent known as Pangaea split up into the current continents.

This splitting occurred during the Jurassic era, and by the end of the Cretaceous era, the tectonic plates were splitting and forming the present continents. The theory receives support from similar fossil records that have been found in different continents around the world (Romm, pp. 407).

The continental drift process led to the formation of the six planets that we have currently. Besides, the boundaries between the tectonic plates experience earthquakes more than any place on earth, hence, the continental drift can be said to have contributed to the quakes that are experienced today.

Works Cited

Greene II, Harry and Burnley, Pamella. A new self-organizing mechanism for deep – focus earthquakes. Nature 341 (6244), 1989. 733–737.

Nettles, Meredith, and Ekström, Goran. Glacial Earthquakes in Greenland and Antarctica. Annual Review of Earth and Planetary Sciences, 38 (1), 2010. 467–491.

Romm, James (February 3, 1994), A New Forerunner for Continental Drift. Nature 367, 1994. 407–408.

More related papers Related Essay Examples
Cite This paper
You're welcome to use this sample in your assignment. Be sure to cite it correctly

Reference

IvyPanda. (2018, September 11). Geology Issue - Nature of Earthquakes. https://ivypanda.com/essays/geology/

Work Cited

"Geology Issue - Nature of Earthquakes." IvyPanda, 11 Sept. 2018, ivypanda.com/essays/geology/.

References

IvyPanda. (2018) 'Geology Issue - Nature of Earthquakes'. 11 September.

References

IvyPanda. 2018. "Geology Issue - Nature of Earthquakes." September 11, 2018. https://ivypanda.com/essays/geology/.

1. IvyPanda. "Geology Issue - Nature of Earthquakes." September 11, 2018. https://ivypanda.com/essays/geology/.


Bibliography


IvyPanda. "Geology Issue - Nature of Earthquakes." September 11, 2018. https://ivypanda.com/essays/geology/.

If, for any reason, you believe that this content should not be published on our website, please request its removal.
Updated:
This academic paper example has been carefully picked, checked and refined by our editorial team.
No AI was involved: only quilified experts contributed.
You are free to use it for the following purposes:
  • To find inspiration for your paper and overcome writer’s block
  • As a source of information (ensure proper referencing)
  • As a template for you assignment
Privacy Settings

IvyPanda uses cookies and similar technologies to enhance your experience, enabling functionalities such as:

  • Basic site functions
  • Ensuring secure, safe transactions
  • Secure account login
  • Remembering account, browser, and regional preferences
  • Remembering privacy and security settings
  • Analyzing site traffic and usage
  • Personalized search, content, and recommendations
  • Displaying relevant, targeted ads on and off IvyPanda

Please refer to IvyPanda's Cookies Policy and Privacy Policy for detailed information.

Required Cookies & Technologies
Always active

Certain technologies we use are essential for critical functions such as security and site integrity, account authentication, security and privacy preferences, internal site usage and maintenance data, and ensuring the site operates correctly for browsing and transactions.

Site Customization

Cookies and similar technologies are used to enhance your experience by:

  • Remembering general and regional preferences
  • Personalizing content, search, recommendations, and offers

Some functions, such as personalized recommendations, account preferences, or localization, may not work correctly without these technologies. For more details, please refer to IvyPanda's Cookies Policy.

Personalized Advertising

To enable personalized advertising (such as interest-based ads), we may share your data with our marketing and advertising partners using cookies and other technologies. These partners may have their own information collected about you. Turning off the personalized advertising setting won't stop you from seeing IvyPanda ads, but it may make the ads you see less relevant or more repetitive.

Personalized advertising may be considered a "sale" or "sharing" of the information under California and other state privacy laws, and you may have the right to opt out. Turning off personalized advertising allows you to exercise your right to opt out. Learn more in IvyPanda's Cookies Policy and Privacy Policy.

1 / 1