BlogArena

General blog about anything and everything of everyday's life.

27. Jun 2019

January 17, 2014
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Eight Seconds of Terror

A JPL Scientist Reflects on L.A.’s Last Big Quake Twenty years ago this week, in the predawn darkness of Jan. 17, 1994, at five seconds before 4:31 a.m. PST, the ground ruptured violently on a blind thrust fault (a crack … Continue reading

July 31, 2013
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Some volcanoes ‘scream’ at ever-higher pitches until they blow their tops

It is not unusual for swarms of small earthquakes to precede a volcanic eruption. They can reach a point of such rapid succession that they create a signal called harmonic tremor that resembles sound made by various types of musical … Continue reading

March 25, 2013
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Lunar impacts created seas of molten rock

A new analysis of data from NASA’s Lunar Orbiter Laser Altimeter (LOLA) shows that molten rock may have been present on the Moon more recently and for longer periods than previously thought. Differentiation — a settling out of rock layers … Continue reading

January 10, 2013
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Magma in Earth’s Mantle Forms Deeper Than Once Thought

Study simulating pressures in mantle beneath the ocean floor shows that rocks can melt at depths up to 250 kilometers Magma forms far deeper than geologists previously thought, according to new research results. A team led by geologist Rajdeep Dasgupta … Continue reading

May 23, 2012
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Clean Energy From CO2?

Global warming villain CO2 may have a surprisingly green future The next frontier in the search for renewable energy lies less than two miles from where you are now. Unless you’re reading this on the International Space Station. Geothermal heat … Continue reading

March 24, 2012
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New Understanding of Earth’s Mantle Beneath The Pacific Ocean

Washington, D.C. — Scientists have long speculated about why there is a large change in the strength of rocks that lie at the boundary between two layers immediately under Earth’s crust: the lithosphere and underlying asthenosphere. Understanding this boundary is … Continue reading

February 20, 2012
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Building Blocks of Early Earth Survived Collision that Created Moon

COLLEGE PARK, Md. – Unexpected new findings by a University of Maryland team of geochemists show that some portions of the Earth’s mantle (the rocky layer between Earth’s metallic core and crust) formed when the planet was much smaller than … Continue reading

February 10, 2012
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3-D Laser Map Shows Earthquake Zone Before and After

*Geologists learn how earthquakes change the landscape — down to a few inches* Geologists have a new tool to study how earthquakes change the landscape–down to a few inches. It’s giving scientists insights into how earthquake faults behave. In this … Continue reading