Months prior to the earthquakes in Chile 2010 and Japan 2011, oscillations of the earth's surface occurred, in extensions of about 1,000 kilometers in each country, after which the decoupling of the tectonic plates was generated, causing both major earthquakes.
Interesting signatures of the Rose Parade were captured by fiber optic telecommunications cable lying below the parade route. In Seismological Research Letters, Zhongwen Zhan of the California Institute of Technology and colleagues describe how they converted these dark or 'unused' fibers within cables into a dense seismic array.
A remarkably complete, 3-D fossil found in Madagascar has revealed clues about a group of early mammals of the Southern Hemisphere known as gondwanatherians. Guillermo Rougier, PhD, a paleontologist specializing in the study of the skull and teeth of ancient mammals, was part of an international team of scientists that has identified the bizarre creature as Adalatherium, translated as 'crazy beast,' a nod to its unusual characteristics. Their analysis was published in the journal Nature.
The land masses of Japan shifted from east to west to east again in the months before the strongest earthquake in the country's recorded history, a 2011 magnitude-9 earthquake that killed more than 15,500 people, new research shows.
A strange reversal of ground motion preceded two of the largest earthquakes in history. This is the result of a new study led by Jonathan Bedford of GFZ German Research Center for Geosciences. Together with international geoscientists he investigated signals recorded in Chile and Japan capturing the movement of GNSS stations before the great Maule quake in 2010 and the Tohoku-oki earthquake in 2011 which led to the tsunami and Fukushima nuclear meltdown. The scientists publish this in the latest issue of Nature.
A team of geologists led by the University of Colorado Boulder is digging into what may be Earth's most famous case of geologic amnesia -- the Great Unconformity.
Under the volcanoes in the Andes where Chile, Argentina and Bolivia meet, there is a gigantic reservoir of molten magma. For several million years, it has been there without fully solidifying or causing a supervolcanic eruption. Geologists have long wondered how this is possible. Researchers from Uppsala University, among others, have now discovered that the secret may be hidden tributaries of hot magma from inside the Earth.
A new stress map that reveals the forces acting on the planet's crust will contribute to safer energy exploration, updated seismic hazard maps and improved knowledge about the Earth.
New research indicates that plate tectonics may have been well underway on Earth more than 3.2 billion years ago, adding a new dimension to an ongoing debate about exactly when plate tectonics began influencing the early evolution of the planet. An analysis of lingering magnetism in rocks from the nearly 3.2 billion year-old Honeyeater Basalt of the East Pilbara.
Officials know how to account for deaths, injuries and property damages after the shaking stops, but a study in Nature Sustainability, based on a hypothetical 7.2 magnitude quake near San Francisco, describes the first way to estimate the far greater financial fallout that such a disaster would have, especially on the poor.