Tag Archive for 'Ultralow-velocity zone'

Pachhai et al. employ seismic data analysis and high-resolution geodynamic modeling to study the origin of ultralow-velocity zones beneath the Coral Sea between Australia and New Zealand. Image credit: Pachhai et al., doi: 10.1038/s41561-021-00871-5.

Ultralow-Velocity Zones are Leftovers from Early Earth’s Magma Ocean, New Study Suggests

Jan 3, 2022 by News Staff

Ultra-low velocity zones sit beneath the central Pacific and Africa, atop the outer core of Earth. In these areas, seismic waves slow by as much as half,...

$Earthquakes send sound waves through the Earth. Seismograms record the echoes as those waves travel along the core-mantle boundary, diffracting and bending around dense rock structures. Kim et al provide the first broad view of these structures, revealing them to be much more widespread than previously known. Image credit: Doyeon Kim, University of Maryland.$

Geophysicists Find Dense Rock Structures near Earth’s Core

Jun 16, 2020 by News Staff

In a new study, a team of geophysicists from the University of Maryland, Johns Hopkins University and Tel Aviv University has analyzed echoes of seismic...