Earthquakes
Rapid Response
The earthquakes were coming fast and frequent, as many as 50 to 70 an hour. On the morning of Sunday, Feb. 28, undersea hydrophones began detecting the most intense swarm of earthquakes to occur in the last three years along the Juan de Fuca Ridge, about 200 miles off the Pacific Northwest coast.
Read MoreIn the Tsunami’s Wake, New Knowledge About Earthquakes
If any good has come from the recent devastating earthquakes off Sumatra, it is that they are providing scientists with unprecedented clues to understanding how these large undersea earthquakes occur and how they create tsunamis.
Read MoreDeep-Sea Tremors May Provide Early Warning System for Larger Earthquakes
Predicting when large earthquakes might occur may be a step closer to reality, thanks to a new study of undersea earthquakes in the eastern Pacific Ocean. The study, reported in today??A’s Nature, is the first to suggest that small seismic shocks or foreshocks preceding a major earthquake can be used in some cases to predict the main tremors.
Read MoreAssessing Algerian Earthquake Risk
Scientists from WHOI and USGS Menlo Park will be assessing future earthquake risk in Algeria and training Algerian researchers under…
Read MoreMajor Caribbean Earthquakes and Tsunamis a Real Risk
A dozen major earthquakes of magnitude 7.0 or greater have occurred in the Caribbean near Puerto Rico, the U.S. Virgin…
Read MoreMonitoring Undersea Earthquakes, Deep Sea Tides and Magnetic Fields
One of the largest known mineral deposits in the deep sea, the Tag hydrothermal site on the Mid-Atlantic Ridge (MAR)…
Read MoreTransmitting Sound Energy
The SOFAR channel efficiently transmits sound energy in the ocean. By Deborah K. Smith :: Originally published online August 3,…
Read MoreEars in the Ocean
If you sought to delve into the forces that drive and shape the face of the earth and that distinguish it from all other planets in our solar system, you would shine a spotlight on the mid-ocean ridges.
Read MoreEarthshaking Events
When I was still a schoolboy in China, two major earthquakes occurred, about a year apart. They had a profound…
Read MorePeering into the Crystal Fabric of Rocks
“Rock solid” is an oxymoron, to my way of thinking. Oh, the expression does have some truth in that minuscule, superficial portion of our planet where humans dwell. But the majority of rocks nearly everywhere else in the earth are continually changing their physical characteristics.
Read MoreListening Closely to ‘See’ Into the Earth
Today, excitement and anticipation is growing because of new generations of seismographs designed for use in the oceans. These new instruments will comprise a new national pool of instruments for use by the scientific community.
Read MoreOcean Seismic Network Seafloor Observatories
Our knowledge of the physical characteristics of Earth’s deep interior is based largely on observations of surface vibrations that occur after large earthquakes. Using the same techniques as CAT (Computer Aided Tomography) scans in medical imaging, seismologists can “image” the interior of our planet. But just as medical imaging requires sensors that surround the patient, seismic imaging requires sensors surrounding the earth.
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