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News
New Underground Map of the Los Angeles Region Tracks Seismic Shaking
2+ hour, 2+ min ago (212+ words) The map shows that soft sediments are up to 10 kilometers deep beneath downtown Los Angeles, whereas other regions such as the San Gabriel and San Bernardino valleys sit atop sediments that are much shallower. This kind of detailed information about…...
Thermal Anomaly Discovered Below Mars's South Pole
5+ day, 14+ hour ago (269+ words) Researchers have discovered a thermal asymmetry deep beneath the surface throughout Mars's southern hemisphere. Based on gravitational measurements that give clues to the Red Planet's interior structure, Mars's interior southern hemisphere is around 200 to 400 degrees Celsius warmer than the northern…...
Models of Glacial Collapse in Antarctica Improve Predictions of Sea-Level Rise
2+ week, 6+ day ago (369+ words) In 2017, a large chunk of the Pine Island Ice Shelf broke off into the ocean to form an iceberg in what is called a calving event, and the glacier has since increased its speed of flow by 20 percent. Understanding when…...
Ganymede Might Still Be Forming Its Metal Core Today
3+ mon, 3+ week ago (207+ words) Jupiter's moon Ganymede is the largest moon in the solar system; at over 3,200 miles across, it is larger than the planet Mercury. It is also the only moon with its own intrinsic magnetic field, produced by a churning central core…...
"Bathtub Ring" is New Evidence for an Ancient Ocean on Mars
4+ mon, 2+ week ago (341+ words) Caltech researchers have identified geological features on Mars that could point to the existence of a long-dried ocean that once covered a third of the Red Planet's surface. The research was conducted by former Caltech postdoctoral scholar Abdallah Zaki and…...
Seismic Activity in California Varies with the Seasons
5+ mon, 6+ day ago (215+ words) The research was conducted in the laboratory of Jean-Philippe Avouac, Earle C. Anthony Professor of Geology and Mechanical and Civil Engineering, and is described in a paper appearing in the journal Science Advances on March 25. The study examined seismic activity in…...
Measuring Local Well-Being from Space
5+ mon, 3+ week ago (802+ words) Caltech Measuring Local Well-Being from Space Since 1990, the United Nations (UN) has used the Human Development Index (HDI) to assess the development of a country using indicators of well-being and quality of life gathered via census data. HDI scores are…...
Ancient Zircon Crystals Provide a Window into Early Earth History
5+ mon, 4+ week ago (648+ words) Caltech Ancient Zircon Crystals Provide a Window into Early Earth History There are many open questions about how our planet formed 4.55 billion years ago: When did plate tectonics start? When did the earth's mantle begin to vigorously circulate in a…...