Destabilising the precarious equilibrium at depth with geothermal wells may reactivate the geological layers causing earthquakes. Researchers (UNIGE/CNR) have studied the seismic activity linked to a geothermal drilling in search of supercritical fluids. They discovered that the drilling did not cause uncontrolled seismic activity. This drilling under such critical conditions suggests that the technology is on the verge of mastering geothermal energy, paving the way for new sources of non-polluting heat and electricity.
Recent seafloor drilling has revealed that the 'hidden continent' of Zealandia -- a region of continental crust twice the size of India submerged beneath the southwest Pacific Ocean -- experienced dramatic elevation changes between about 50 million and 35 million years ago.
A new approach to analyzing seismic data reveals deep vertical zones of low seismic velocity in the plumbing system underlying Alaska's Cleveland volcano, one of the most-active of the more than 70 Aleutian volcanoes. Unlike typical seismic imaging experiments that deploy dozens of seismometers, this study used only eight.
Nearly 40 years ago, analog data tapes faithfully recorded intense seismic activity in the two months before the historic eruption of Mount St. Helens in Washington State in May 1980. It took some lengthy and careful restoration efforts--including a turn in a kitchen oven for some of the tapes--to recover their data.
Earthquakes along a complex series of faults in the upper plate of New Zealand's northern Hikurangi Subduction Margin were responsible for coastal uplift in the region, according to a new evaluation of local marine terraces.
Researchers used a novel technique to study the faults in the Japan Trench, the subduction zone where the magnitude 9.1 Tohoku-Oki earthquake struck in 2011. Their findings reveal a long history of large earthquakes in this fault zone, where they found multiple faults with evidence of more than 10 meters of slip during large earthquakes.
A team of researchers at the University of Ottawa has made an important breakthrough that will help better understand the origin and behavior of slow earthquakes. Their work presents unprecedented evidence that slow earthquakes are related to dynamic fluid processes at the boundary between tectonic plates. These slow earthquakes are quite complex, and many theoretical models of slow earthquakes require the pressure of these fluids to fluctuate during an earthquake cycle.
The 2019 Ridgecrest earthquake sequence, which startled nearby California residents over the 4 July holiday with magnitude 6.4 and magnitude 7.1 earthquakes, included 34,091 earthquakes overall, detailed in a high-resolution catalog created for the sequence.
The Borexino collaboration has presented new results for the measurement of neutrinos originating from the interior of the Earth. With this update, the researchers have now been able to access 53 events -- almost twice as many as in the previous analysis of the data from the Borexino detector, which is located 1,400 meters below the Earth's surface. The results provide an exclusive insight into processes in the earth's interior that remain puzzling to this day.
Engineers at Duke University have devised a model that can predict the early mechanical behaviors and origins of an earthquake in multiple types of rock. The model provides new insights into unobservable phenomena that take place miles beneath the Earth's surface under incredible pressures and temperatures, and could help researchers better predict earthquakes -- or even, at least theoretically, attempt to stop them.