Repeating seismic events -- events that have the same frequency content and waveform shapes -- may offer a glimpse at the movement of magma and volcanic gases underneath Turrialba and Poas, two well-known active volcanoes in Costa Rica.
Can altering the amount or rate of fluid injection and production in an oil and gas field or carbon storage site affect induced earthquakes in that field? A physics-based simulation presented at the 2018 SSA Annual Meeting suggests that this type of 'active pressure management' can be useful in controlling induced seismicity at certain wells.
University of Adelaide-led research has uncovered the history of when and why the native vegetation that today dominates much of Australia first expanded across the continent.
ANU archaeologist Dr. Catherine Frieman unearths an intact 4,000-year-old human cremation in clay pottery urn on a Cornish site she discovered by accident.
A new global, satellite-based study of Earth's freshwater found that Earth's wet areas are getting wetter, while dry areas are getting drier. The data suggest this pattern is due to many factors, including human water management practices, human-caused climate change and natural climate cycles. The NASA-led research team used 14 years of observations from the Gravity Recovery and Climate Experiment (GRACE) mission to track global trends in freshwater in 34 regions around the world.
Nyiragongo in the Democratic Republic of the Congo is among the world's most active volcanoes, with a persistent lava lake as one of its defining features. In a talk at the 2018 SSA Annual Meeting, Adrien Oth of the European Center for Geodynamics and Seismology will discuss how he and his colleagues are using multiple methods to monitor lava lake levels at the volcano.
Scientists monitoring the vibrations of natural rock arches have found that the resonant frequencies of arches undergo dynamic changes from day to day, according to research presented at the 2018 SSA Annual Meeting.
A NASA mission has discovered an important process explaining the fate of energy contained in the turbulent magnetic fields surrounding the Earth.
Wherever magnetic fields occur in the cosmos, their field lines tend to cross and reconnect, spitting out charged particles. To date, space scientists have studied these short circuits in the near-Earth environment, but only in rather calm regions of the magnetosphere. Now scientists led by Tai Phan at UC Berkeley have seen how turbulent magnetic fields reconnect in the much more violent magnetosheath. While normal reconnection generates ion jets, turbulent reconnection creates electron jets.
Low rises on the ocean floor at a depth of 5,500 meters in the western North Pacific regulate surface flows and create sharp sea surface temperature (SST) fronts, which have tremendous effects on the climate and marine resources.