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Related Concept Videos

Tidal Forces01:06

Tidal Forces

The origin of Earth's ocean tides has been a subject of continuous investigation for over 2000 years. However, the work of Newton is considered to be the beginning of the proper understanding of the phenomenon. Ocean tides are the result of gravitational tidal forces. These same tidal forces are present in any astronomical body; they are responsible for the internal heat that creates the volcanic activity on Io, one of Jupiter's moons, and the breakup of stars that get too close to black holes.
Travelling Waves01:04

Travelling Waves

A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...
Kinetic and Potential Energy of a Wave01:10

Kinetic and Potential Energy of a Wave

All forms of waves carry energy; this is directly visualized in nature. For instance, the waves of earthquakes are so intense that they can shake huge concrete buildings, causing them to fall. Loud sounds can damage nerve cells in the inner ear, causing permanent hearing loss. The waves of the oceans can erode beaches. 
In mechanical waves, the amount of energy is related to their amplitude and frequency. In the context of the above examples, large-amplitude earthquakes produce large ground...
Shock Waves01:16

Shock Waves

While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high pressures...
Modes of Standing Waves - I01:03

Modes of Standing Waves - I

A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This phenomenon...
Standing Waves01:17

Standing Waves

Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...

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Related Experiment Video

Updated: May 24, 2026

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
07:58

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Published on: August 7, 2017

Seismically generated tsunamis.

Diego Arcas1, Harvey Segur

  • 1NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA 98115-6349, USA.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|March 7, 2012
PubMed
Summary
This summary is machine-generated.

Tsunami awareness has increased globally due to major events. This paper reviews tsunami dynamics, forecasting methods, and policy recommendations for improved public safety from these natural disasters.

Related Experiment Videos

Last Updated: May 24, 2026

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
07:58

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Published on: August 7, 2017

Area of Science:

  • Geophysics
  • Oceanography
  • Disaster Risk Reduction

Background:

  • The 2004 Indian Ocean and 2011 Japan tsunamis significantly raised global awareness and highlighted the devastating impact of these natural hazards.
  • These events caused widespread loss of life and triggered secondary disasters, such as the Fukushima nuclear accident, underscoring the need for better understanding and preparedness.

Purpose of the Study:

  • To consolidate current scientific understanding of tsunami dynamics.
  • To explain the application of this knowledge in operational tsunami forecasting.
  • To propose policy enhancements for mitigating future tsunami risks.

Main Methods:

  • Literature review of tsunami dynamics and research.
  • Analysis of current tsunami forecasting systems and technologies.
  • Policy analysis and recommendations for disaster management.

Main Results:

  • A comprehensive summary of the physical processes governing tsunami generation, propagation, and inundation.
  • An overview of advancements in early warning systems and forecasting models.
  • Identification of key areas for policy development in tsunami preparedness and response.

Conclusions:

  • Enhanced scientific knowledge of tsunami dynamics is crucial for accurate forecasting.
  • Effective tsunami risk reduction requires integrated strategies encompassing scientific research, technological application, and robust policy frameworks.
  • Continued investment in research and international cooperation is vital for protecting vulnerable coastal communities worldwide.