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Unusual fault rupture during Kaikōura quake

One of the 24-plus faults that ruptured in the 2016 magnitude 7.8 Kaikōura earthquake has turned out to be even more unusual than scientists...

Machu Picchu: Ancient Incan sanctuary intentionally built on faults

The ancient Incan sanctuary of Machu Picchu is considered one of humanity's greatest architectural achievements. Built in a remote Andean setting atop a narrow...

Curved slickenlines preserve the direction of rupture propagation

Slip-parallel grooves (striations) on fault surfaces are considered a robust indicator of fault slip direction, yet their potential for recording aspects of earthquake rupture...

Folding faults and seismic risk in the Kunlun range, Northwest Tibet

The tectonic deformation and growth pattern of the western Kunlun, which is the northwestern margin of the Tibetan Plateau, are not currently well understood....

California’s current earthquake hiatus is an unlikely pause

There have been no major ground rupturing earthquakes along California's three highest slip rate faults in the past 100 years. A new study published...

Signs of 1906 earthquake revealed in mapping of offshore northern San...

A new high-resolution map of a poorly known section of the northern San Andreas Fault reveals signs of the 1906 San Francisco earthquake, and...

Seemingly dormant geologic fault damaged famous Roman buildings 1,500 years ago

A geologic fault system in central Italy that produced a deadly earthquake in 2016 is also responsible for a fifth-century earthquake that damaged many...

Fault lines are no barrier to safe storage of CO2 below...

Carbon dioxide emissions can be captured and securely stored in underground rocks, even if geological faults are present, research has confirmed. There is minimal possibility...

Geoscientists find unexpected ‘deep creep’ near San Andreas, San Jacinto faults

A new analysis of thousands of very small earthquakes that have occurred in the San Bernardino basin near the San Andreas and San Jacinto...

‘Slow earthquakes’ on San Andreas Fault increase risk of large quakes

Geologists have long thought that the central section of California's famed San Andreas Fault -- from San Juan Bautista southward to Parkfield, a distance...

Site of the next major earthquake on the San Andreas Fault?

Many researchers hypothesize that the southern tip of the 1300-km-long San Andreas fault zone (SAFZ) could be the nucleation site of the next major...

Parkfield segment of San Andreas fault may host occasional large earthquakes

Although magnitude 6 earthquakes occur about every 25 years along the Parkfield Segment of the San Andreas Fault, geophysical data suggest that the seismic...

Research shows North Texas earthquakes occurring on ‘dead’ faults

Recent earthquakes in the Fort Worth Basin - in the rural community of Venus and the Dallas suburb of Irving - occurred on faults...

Fault Types : What are the three main types of faults?

What is a fault? A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative...

What Is a Geologic Fault?

A fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of...

Study Confirms Large Earthquakes along Olympic Mountain Faults

A comprehensive study of faults along the north side of the Olympic Mountains of Washington State emphasizes the substantial seismic hazard to the northern...

Sampling of the active alpine fault in New Zealand reveals extreme...

A recent study published in Nature has demonstrated unusual heat generation and fluid movement in the Alpine Fault of New Zealand that has implications...

Foreshock activities leading up to Pawnee earthquake

A University of Oklahoma geophysics professor, Xiaowei Chen, details the foreshock activities leading up to the Pawnee earthquake, and highlights the complicated relationship between...

How Strike-Slip Faults Form, the Origin of Earthquakes

Structural geologist Michele Cooke calls it the "million-dollar question" that underlies all work in her laboratory at the University of Massachusetts Amherst: what goes...

Faulted Sedimentary Rock Layers, Guatemala

Photograph of faulted sedimentary rock layers exposed in a roadcut in Guatemala. The sedimentary rocks originally were deposited as horizontal layers of sand and...

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