The earthquake that triggered the massive tidal wave in Asia
not only changed Earth's rotation, it left a scar on
Earth's gravity. When the earthquake and tidal wave
happened, we were all told about the slight change in
the rotation of our planet, but now scientists are speaking
about the change in gravity. The change in gravity has
to do with the change in landforms under the water.
This is being monitored from space by NASA as well as
other science agencies.
Sumatran Quake Left 'Scar' on Earth's Gravity
By LiveScience Staff
25 April 2005
The devastating 2004 Sumatran earthquake, which caused the worst tsunami in modern times, should have left a detectable scar on Earth's gravity
field, European scientists said Monday.
The new prediction comes from Roberto Sabadini and Giorgio Dalla Via at the University of Milan. The idea is fairly straightforward. The strength of
Earth's gravity varies depending on the depth of a trench or height of a mountain, as well as the density of material. Even changing tides alter the
Gravity variations are measured using the geoid, which is similar to sea-level. The geoid is a hypothetical "surface" around the Earth at which the
planet's gravitational pull is the same everywhere. Over dense areas, the geoid moves away from the real surface, and where gravity is less, the
geoid moves closer to the real surface.
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I found this to be interesting and thought provoking. A
massive change in landforms can change gravity.
Was the gravity of Hiroshima effected during WWII?
Would the land effects of a nuclear war effect the
Earth's gravity? Hawking says gravity and time are
connected. That leads to more thoughts and questions.
[edit on 4/27/2005 by FlyersFan]