A powerful earthquake shook the South Pacific island nation of Vanuatu on Thursday evening, but countries in the region said there was no threat of a tsunami.
Environment
Dec 7, 2023
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22
A powerful earthquake that shook the southern Philippines killed at least one villager and injured several others as thousands scrambled out of their homes in panic and jammed roads to higher grounds after a tsunami warning ...
Environment
Dec 3, 2023
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28
There are thousands of mountains scattered across the seafloor, many of which are thousands of meters tall. These seamounts may have significant impacts on seismicity when the portion of the ocean floor they are on is subducted ...
Earth Sciences
Nov 30, 2023
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10
Icelanders are no strangers to volcanic eruptions, but right now the country waits in a state of limbo.
Earth Sciences
Nov 29, 2023
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26
On February 6, 2023, the devastating magnitude MW 7.8 Kahramanmaraş earthquake in South East Türkiye ruptured multiple fault segments of the "East Anatolian Fault Zone' separating the Anatolian and Arabian tectonic plates.
Earth Sciences
Nov 28, 2023
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46
A strong, deep undersea earthquake shook the eastern side of Indonesia on Wednesday with no immediate reports of casualties or damages in the area.
Environment
Nov 22, 2023
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1
A moderate earthquake shook eastern Myanmar on Friday morning.
Environment
Nov 17, 2023
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1
One of the world's most active volcanoes, Mount Etna, erupted on Sunday—spewing lava and clouds of ash high over the Mediterranean island of Sicily. This image, captured on 13 November by the Copernicus Sentinel-2 mission, ...
Earth Sciences
Nov 16, 2023
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17
High mountain regions often face a multitude of natural hazards, the combined effects of which, known as "cascading hazards," can have serious consequences for infrastructure and urban areas.
Earth Sciences
Nov 14, 2023
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1
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
0
1
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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