What Are Seismic Waves?
Seismic waves are vibrations that carry energy away from an earthquake, explosion or other sudden source. Their speed and path depend on the elastic properties and density of the material they travel through.
Understand the forces that reshape Earth through plate tectonics, earthquakes, faults, magma and volcanic eruptions.
Begin with clear explanations of the key ideas, discoveries and questions in this subject.
Seismic waves are vibrations that carry energy away from an earthquake, explosion or other sudden source. Their speed and path depend on the elastic properties and density of the material they travel through.
Volcanoes erupt when magma and gases move from depth toward Earth's surface and pressure overcomes the strength of surrounding rock. The style of eru…
Plate tectonics is the framework that explains the large-scale motion of Earth's rigid outer shell. The lithosphere is broken into plates that move o…
Earthquakes happen when stress accumulated in rocks is released suddenly as a fault slips. Tectonic plates move continuously, but friction can lock p…
48 people were killed in the violent eruption of the volcano Merapi on Indonesia's Java island this early morning ...
The Bardarbunga volcano in Iceland erupts violently with lava flows fired into the air about 70m high.
Read recent ScienceInfo stories and explainers about Earthquakes & Volcanoes.
Monte Busca is considered to have completely lost its 'volcanic pride'.
Mount Olympus on Mars is the largest mountain in the Solar System and is believed to be the tallest of the eight planets.
Mud volcanoes form when a combination of mud, liquids, and gases erupts onto the Earth's surface.
The UAE's Hope probe sent back its first image of Mars days after successfully entering orbit around the planet.
A new drug that promises to save millions of lives is being developed based on a discovery made half a century ago in a crater in Cameroon.
The Icelandic Meteorological Organization (IMO) said that early on the morning of November 21, Vietnam time, a volcano erupted on the Reykjanes peninsula, about 30km sou…
Locals were left screaming in panic after seeing the volcano in San José de Mulatos, Colombia suddenly erupt.
The Hubble Telescope captured an image that NASA describes as
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Not to surf Facebook, to watch videos on YouTube, but covering the entire volcano in Nicaragua with the internet will help scientists gain data to predict when it is abo…
The impact of the ashes from the volcano is huge. When volcanic eruptions, ash columns can reach several kilometers high, affecting a large radius.
An earthquake that rocked Mount St Helens in Washington may have woken a more dangerous volcano, capable of flattening the entire US city, seismologists warned.
Mauna Loa, the largest active volcano in the world, may be preparing to erupt again as seismic and distortion monitoring data show that small earthquakes are frequent.
Two Indonesian volcanoes had an eruption on November 18, causing many flights to be canceled or changed, and thousands of evacuated people could not return home.
The researchers found that super volcanoes can erupt at any time, without the impact of earthquakes or external stimuli.
Scientists say that the Mayon volcano peak has been rocked and landslided in the past 24 hours after a number of heat eruptions.
Without the lava-red eruptions, the volcano Ol Doinyo Lengai in Africa spilled an impressive stream of black lava.
The highest volcano in the Eurasian continent is Klyuchevskoi, located on the Kamchatka peninsula in the Russian Far East, on the morning of October 10, spraying ash col…
The Japan Meteorological Agency (JMA) said the Sakurajima volcano in southern Japan erupted on the afternoon of August 18, tossing up as much as 5,000 meters of ash.
A volcano on the Kamchatka peninsula in the Russian Far East on August 6 began to operate fiercely, spraying ashes into the sky to a height of 6.5km, RIA Novosti quoted…
On May 30, the Government of Guatemala officially announced the orange alarm (the closest to the red alert) due to fears that Pacaya volcano in the country might erupt a…