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  1. www.phivolcs.dost.gov.ph › index › earthquakeIntroduction to Earthquake

    2 days ago · Learn what an earthquake is, how to measure its strength, and the types of earthquakes. Find out how PHIVOLCS monitors and reports earthquakes in the Philippines.

  2. Jun 13, 2024 · The location where an earthquake begins is called the epicenter. An earthquake’s most intense shaking is often felt near the epicenter. However, the vibrations from an earthquake can still be felt and detected hundreds, or even thousands of miles away from the epicenter.

  3. 3 days ago · Practically all man-made structures are destroyed. Massive landslides and liquefaction, large scale subsidence and uplifting of land forms and many ground fissures are observed. Changes in river courses and destructive seiches in large lakes occur. Many trees are toppled, broken and uprooted.

  4. Jun 28, 2024 · Richter first applied his magnitude scale to shallow-focus earthquakes recorded within 600 km of the epicentre in the southern California region. Later, additional empirical tables were set up, whereby observations made at distant stations and on seismographs other than the standard type could be used.

  5. Jun 28, 2024 · Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another. Learn more about the causes and effects of earthquakes in this article.

  6. Jun 26, 2024 · Study with Quizlet and memorize flashcards containing terms like Eartquake Focus or Hypocenter, Earthquake Focus, Hypocenter and more.

  7. Jun 28, 2024 · If there were complete symmetry about the vertical through the earthquake’s focus, isoseismals would be circles with the epicentre (the point at the surface of the Earth immediately above where the earthquake originated) as the centre.

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