Sentences with phrase «studied seismic waves»

Geophysicist Xiaodong Song of the University of Illinois at Urbana - Champaign and his colleagues studied seismic waves from doublets — pairs of earthquakes from the same place but occurring at different times.

The pair studied the seismic waves from 76 underwater earthquakes.

Geophysicists try to explore the architecture of Earth by studying seismic waves that shimmy through the planet.

Levin studies seismic waves, or the vibrations that pass through our planet following earthquakes.

Most knowledge of the planet's internal structure comes from studying seismic waves, which give a kind of ultrasound image.

Not exact matches

Seismic studies also revealed that all earthquakes created a P - wave «shadow zone» on Earth's surface where primary waves didn't arrive at some seismic stations; the location of the P - wave shadow zone varied with the point of origin of the eartSeismic studies also revealed that all earthquakes created a P - wave «shadow zone» on Earth's surface where primary waves didn't arrive at some seismic stations; the location of the P - wave shadow zone varied with the point of origin of the eartseismic stations; the location of the P - wave shadow zone varied with the point of origin of the earthquake.

For decades, researchers have studied the interior of the Earth using seismic waves from earthquakes.

The researchers utilized a novel approach of studying long - term variations in seismic signals, called microseisms, generated by ocean waves in the region.

Romanowicz, who uses seismic waves to study Earth's interior, had previously worked with French, then a graduate student, on a tomographic model of the upper 800 kilometers of the mantle, which showed periodic hot and cold regions of rock underlying hotspot volcanoes.

Seismic waves offer extra information about an explosion, new studies show.

A six - year study of seismic activity along the San Andreas Fault found that the 2004 Parkfield earthquake caused breakage and microcracking in shallow rock layers that changed the speed at which seismic waves moved through the area, making it more vulnerable to tremors for more than three years afterward.

Scientists have long been able to harness surface waves to study the upper layers of the planet's crust, and recently they have even been able to extract surface waves from the so - called ambient seismic field.

Other papers in the issue examine how deep sea sediments may affect seismic wave readings, and evaluate how the Cascadia Initiative's data collection from ocean bottom seismometers has improved over the first three years of the study.

The study explored seven effects associated with asteroid impacts — heat, pressure shock waves, flying debris, tsunamis, wind blasts, seismic shaking and cratering — and estimated their lethality for varying sizes.

«This study shows how we can expand the use of seismic data by looking at the acoustic waves from volcanic explosions that are recorded on seismometers,» explained Fee.

By studying the speed at which seismic waves travel in different directions through the same material, a phenomenon called seismic anisotropy, the researchers found that interior of the Nazca plate had been deformed during subduction.

The evidence comes both from the time it takes seismic waves to travel through the core and from studies of the Earth's natural vibration frequencies.

As with past studies that made images of Yellowstone's volcanic plumbing, the new study used seismic imaging, which is somewhat like a medical CT scan but uses earthquake waves instead of X-rays to distinguish rock of various densities.

They often perform seismic studies, for example, which involve bouncing energy waves off buried layers of rock, to search for oil and gas or to understand the structure of the subsurface layers.

For the purpose of this study, a team of geologists from the Nanjing University, China, and the University of Illinois studied the echoes generated by seismic waves produced during earthquakes to scan below the surface of Earth, much like an ultrasound is used to see inside patients.

«The animals may sense seismic waves — it could P, S or surface waves — generated by foreshocks,» said Heiko Woith, coauthor of the study.

The main body of contents is composed of scientific papers on the various aspects of seismology, including: investigation of specific earthquakes, theoretical and observational studies of seismic waves; inverse methods for determining the structure of the earth or the dynamics of the earthquake source; seismometry; earthquake hazard and risk estimation; seismotectonics; earthquake engineering; paleoseismology; tsunami studies.

The above paper further stated that studies had detected seismic waves from wind turbines that were above background levels to distances up to 18 km.