Tags Geophysics

Tag: Geophysics

New approach offers high-resolution seismic monitoring of the shallow subsurface

Accurate monitoring of the ground beneath our feet for signs of seismic activity to identify natural phenomena such as earthquakes, volcanic eruptions and the...

Seismic analysis identifies 2017 North Korean nuclear explosion, collapse, earthquakes

Careful analysis of data collected after the 3 September 2017 North Korean declared nuclear test explosion has allowed seismologists to distinguish the separate seismic...

Regional seismic data help to locate September 2017 North Korean nuclear...

The epicenter of the 3 September 2017 nuclear test explosion in North Korea occurred about 3.6 kilometers northwest of the country's first nuclear test...

Seismic research cruise provides new data on US Atlantic margin gas...

Data acquired by the U.S. Geological Survey on the U.S. Atlantic margin in August 2018 reveal new information about the distribution of gas hydrates...

Study uses seismic noise to track water levels in underground aquifers

Seismic noise—the low-level vibrations caused by everything from subway trains to waves crashing on the beach—is most often something seismologists work to avoid. They...

Urban geophone array offers new look at northern Los Angeles basin

Using an array of coffee-can sized geophones deployed for about a month in backyards, golf courses and public parks, researchers collected enough data to...

Optimized positioning of geothermal boreholes reduces seismicity

When constructing geothermal systems for the extraction of heat from underground hot water reservoirs, optimal positioning of the boreholes can considerably reduce seismicity. This...

Scientists find seismic imaging is blind to water

When an earthquake strikes, nearby seismometers pick up its vibrations in the form of seismic waves. In addition to revealing the epicenter of a...

Using Sensors Beneath Our Feet to Tell Us About Earthquakes, Water,...

Scientists at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) have shown for the first time that dark fiber - the vast...

Geophysicists uncover new evidence for an alternative style of plate tectonics

When renowned University of Toronto (U of T) geophysicist J. Tuzo Wilson cemented concepts in the emerging field of plate tectonics in the 1960s,...

Mysterious deep-Earth seismic signature explained

New research on oxygen and iron chemistry under the extreme conditions found deep inside the Earth could explain a longstanding seismic mystery called ultralow...

Scientists use seismic waves to measure tornado intensity

Seismic waves generated by tornadoes when they touch down could be used to measure a twister's intensity, according to a new study. The new research...

Drilling into the mysteries of seismic activity

An international expedition aims to better understand seismic activity through samples collected from one of the most geologically active areas in Europe. More than 30...

Database eyes human role in earthquakes

A new database showcasing hundreds of examples of human-triggered earthquakes should shake up policy-makers, regulators and industry executives looking to mitigate these unacceptable hazards...

Researchers produce new map of seismic hazards in Brazil

Researchers are working on a new national map of seismic hazards for Brazil. In preparing the seismic hazard map, the researchers first conducted a...

Study details evidence for past large earthquakes in the Eastern Tennessee...

The Eastern Tennessee Seismic Zone (ETSZ), a zone of small earthquakes stretching from northeastern Alabama to southwestern Virginia, may have generated earthquakes of magnitude...

Hydraulic fracturing rarely linked to felt seismic tremors

New research suggests hydraulic fracturing and saltwater disposal has limited impact on seismic events. For the past two years, UAlberta geophysicist Mirko Van der Baan...

Geophysicist Helps Develop High-Res Map of Earth’s Magnetic Field

A University of Kentucky geophysicist is helping an international team of scientists reveal dramatic new information about the Earth's magnetic field. Two years ago, Dhananjay...

A seismic mapping milestone

Because of Earth's layered composition, scientists have often compared the basic arrangement of its interior to that of an onion. There's the familiar thin...

Old rocks, biased data: Overcoming challenges studying the geodynamo

Gleaning data from old rocks may result in bias. Now, geophysicists have a way to improve their methods to overcome challenges in studying the...

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