Scientists have found anomalous structures around the Earth’s core

The video discusses a study published in Science on June 12th, which analyzed 7000 seismograms from earthquakes of magnitude 6.5 or greater, occurring between 1990 and 2008. Using a machine learning algorithm called Sequencer, researchers searched for seismic wave echoes beneath the Pacific Ocean. They discovered an anomalous structure under the Marquesas Islands and found that a known structure beneath the Hawaiian Islands is larger than previously thought.

What was the magnitude threshold for the earthquakes analyzed in the study?

• 5.0

• 6.0

• 7.0

• 6.5

What tool did researchers use to analyze seismic waves?

• Sequencer

• Seismometer

• Spectrometer

• Seismograph

Which type of seismic waves were specifically searched for in the study?

• S waves

• L waves

• R waves

• P waves

Where was an anomalous structure discovered according to the study?

• Under the Atlantic Ocean

• Under the Indian Ocean

• Under the Marquesas Islands

• Under the Arctic Ocean

What did the study reveal about the structure beneath the Hawaiian Islands?

• It is the same size as expected

• It has disappeared

• It is smaller than expected

• It is larger than previously thought