The ocean is constantly whirring with activity. The pressure from this constant roiling and swelling is one cause of microseisms—random, nearly imperceptible vibrations of Earth that also can be produced by human activities ...
Earth Sciences
Sep 21, 2023
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1
On the night of September 8, a magnitude 6.8 earthquake hit Morocco in the Atlas Mountains near the historic town of Marrakesh. The tremor, the biggest to strike the country in over a century, shattered hundreds of buildings ...
Earth Sciences
Sep 20, 2023
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9
Disasters can happen anywhere.
Earth Sciences
Sep 19, 2023
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Following the devastating earthquake that struck Morocco on 8 September, satellite data have been made available through the International Charter "Space and Major Disasters" to help emergency response teams on the ground.
Planetary Sciences
Sep 14, 2023
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4
Earthquakes, large and small, happen every single day along zones that wrap around the world like seams on a baseball. Most don't bother anybody, so they don't make the news. But every now and then a catastrophic earthquake ...
Earth Sciences
Sep 14, 2023
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13
Fires that raged in the days following the 1 September 1923 magnitude 7.9 Kantō earthquake killed roughly 90% of the 105,000 people who perished in and around Tokyo, making it one of the deadliest natural disasters in history—comparable ...
Environment
Sep 13, 2023
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1
The epicenter of Morocco's devastating earthquake on 8 September was in the High Atlas Mountains, about 71km south-west of Marrakesh. Moina Spooner, from The Conversation Africa, asked Jesús Galindo-Zaldivar, who has been ...
Earth Sciences
Sep 11, 2023
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13
In work published in Science Advances, a team of researchers have determined a new pressure scale, which is critical for understanding the Earth's composition.
Earth Sciences
Sep 11, 2023
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1
An earthquake has sown destruction and devastation in Morocco, where death and injury counts continue to rise after rescue crews dug out people both alive and dead in villages that were reduced to rubble.
Environment
Sep 11, 2023
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10
The powerful earthquake that struck Morocco, killing more than 2,000 people, didn't hit in the most active seismological region, said one French expert. But aftershocks can be expected, he warned.
Environment
Sep 9, 2023
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43
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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