As seismic activity intensifies ahead of an impending eruption of a fissure near Iceland's Fagradalsfjall volcano, the island's Reykjanes Peninsula is experiencing hundreds of earthquakes per day.
Earth Sciences
Nov 16, 2023
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58
A town has been evacuated in southwestern Iceland after hundreds of earthquakes caused by shifting underground magma sparked fears of a full-blown volcanic eruption.
Environment
Nov 16, 2023
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44
Professor Nick Rawlinson is fascinated by the shifting crust of the planet, the jostle of tectonic plates, the rupture of faults and the shaking of the earth.
Earth Sciences
Nov 14, 2023
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1
From Christmas gifts to sheep, residents forced from an Icelandic town damaged by hundreds of earthquakes in recent days were able to briefly return on Monday to retrieve their belongings, authorities said.
Environment
Nov 14, 2023
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0
The Blue Lagoon geothermal spa—one of Iceland's biggest tourist attractions—closed temporarily as a swarm of earthquakes put the island nation's most populated region on alert for a possible volcanic eruption.
Environment
Nov 9, 2023
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69
One of California's riskiest volcanoes has for decades been undergoing geological changes and seismic activity, which are sometimes a precursor to an eruption, but—thankfully—no supervolcanic eruptions are expected.
Earth Sciences
Oct 28, 2023
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66
A research team from the Aerospace Information Research Institute (AIR) of the Chinese Academy of Sciences has explored the long-lasting effects of pre-phase landslides on future landslide occurrences and evaluated the susceptibility ...
Earth Sciences
Oct 26, 2023
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6
Most people think of seismic activity as the result of movement along faults or of violent volcanic eruptions. But seismic events can have other causes, including floods and even large crowds of excited fans—such as those ...
Earth Sciences
Oct 23, 2023
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548
Mount Edgecumbe volcano in Southeast Alaska has become the latest addition to the Alaska Volcano Observatory's ground-based monitoring network. An observatory team in early September installed three seismic and Global Navigation ...
Earth Sciences
Sep 18, 2023
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52
We have built telescopes in our backyards, and high upon remote mountains, and even launched telescopes into space. With each advancement in our technology, we have made amazing and surprising new discoveries about the universe. ...
Astronomy
Sep 11, 2023
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15
An earthquake (also known as a tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The moment magnitude of an earthquake is conventionally reported, or the related and mostly obsolete Richter magnitude, with magnitude 3 or lower earthquakes being mostly imperceptible and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale.
At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacing the ground. When a large earthquake epicenter is located offshore, the seabed sometimes suffers sufficient displacement to cause a tsunami. The shaking in earthquakes can also trigger landslides and occasionally volcanic activity.
In its most generic sense, the word earthquake is used to describe any seismic event — whether a natural phenomenon or an event caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by volcanic activity, landslides, mine blasts, and nuclear experiments. An earthquake's point of initial rupture is called its focus or hypocenter. The term epicenter refers to the point at ground level directly above the hypocenter.
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