The 2004 earthquake in Indonesia occurred due to subduction of the indian-australian plate under the eurasian plate, creating a tsunami that killed over 220,000 people.
Most tsunamis are caused by sudden vertical movement of the ocean floor. Certain types of earthquakes, shear and normal fault earthquakes, occur at shallow depths below the seafloor and can cause very rapid seafloor movements.
As a general rule, the larger the region of displacement and hence the stronger the wave, the stronger the earthquake. In 2004, an earthquake in a subduction zone west of the Indonesian island of Sumatra triggered a significant tsunami in the Indian Ocean. The Sumatra Trench is formed when pieces of the Eurasian Plate are sunk beneath the Indian Ocean Plate there.
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the p waves is higher than the s waves
Although the light year is a
commonly used unit, astronomers
prefer a different unit called the parsec (pc). A parsec, equal to 3.26
light years, is defined as the distance at which 1 Astronomical Unit subtends an
angle of 1 second of arc (1/3600 of a degree) When we use the parsec for really
large distances, we often put a prefix in front of it - like kiloparsecs (kpc),
which are equal to 1000 parsecs - or Megaparsecs (Mpc), equal to a million
parsecs.
The Milky Way is about 1,000,000,000,000,000,000 km
(about 100,000 light years or about 30 kpc) across. The Sun does not lie near
the center of our Galaxy. It lies about 8 kpc from the center on what is known
as the Sagittarius arm of the Milky Way.
Not defined because of the vertical line.
