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A map summarizing the new REEF measure of seismic energy for events around the Pacific Ring of Fire shows the regional patterns indicating earthquake rupture character is affected by persistent features that differ from region to region.

Seismologists introduce new measure of earthquake ruptures

Garnet.

The secrets of garnet reveal source of water to fuel powerful...

Map shows earthquake epicenters (surrounded in light red) offshore where the Cocos and North American tectonic plates meet. The newer fault zone is inland, the black lines mark the changing trajectories of abyssal hills atop the descending Cocos Plate. Blue-shaded areas in this zone are where subduction angles remain steep. The pink area, below Mexico City, is a transition zone where another earthquake could occur. The 2017, 1999 and 1980 quake epicenters are in a red-shaded zone to the southeast that is considered to be at most risk for quakes.

Mexico’s 2017 earthquake emerged from a growing risk zone

On its current expedition, the drillship JOIDES Resolution is working off the coast of New Zealand.

Deep-sea observatories to offer new view of seabed earthquakes

paleoseismological record of the Liquiñe-Ofqui Fault Zone (LOFZ)

Researchers discover evidence of earthquakes that affected Chilean coast in the...

Fracking

Human-made earthquake risk reduced if fracking is 895m from faults

seismogram

Earthquakes follow wastewater disposal patterns in southern Kansas

This schematic illustration of the 2014 Iquique earthquake off the coast of Chile (magnitude 8.1) shows the locations of foreshocks (blue) and aftershocks (red) relative to the area of large slip on the fault (contour lines).

Analysis of major earthquakes supports stress reduction assumptions

Earthquake simulation

Hayward fault earthquake simulations increase fidelity of ground motions

This new map of Earth’s stress field in the Permian Basin of West Texas and southeastern New Mexico could help energy companies avoid causing earthquakes associated with oil extraction. Credit: Jens-Erik Lund Snee

Seismic stress map profiles induced earthquake risk for West Texas, New...

Pipeline monument, Cushing, Oklahoma.

Oklahoma’s earthquakes strongly linked to wastewater injection depth

Researchers taking sediment cores on Chilean lake Calafquén (with Villarrica Volcano in the background).

Giant earthquakes: Not as random as thought

Moon

Do moon phases produce big earthquakes?

A UAlberta researcher is the first to link the likelihood of earthquakes caused by hydraulic fracturing to the location of well pads and volume of liquid used in the process.

Fox Creek earthquakes linked to completion volume and location of hydraulic...

Seismogram

Rates of great earthquakes not affected by moon phases, day of...

Earthquakes as a driver for the deep-ocean carbon cycle

Annual geographic centroid locations for the years 2011-2016 (the underlying fault map is by Marsh and Holland, 2016), including volume-weighted well centroids, the 1σ radius of gyration, and M3+ earthquake centroids.

Shakedown in Oklahoma: To cut the number of bigger earthquakes, inject...

Wastewater injected in an underground reservoir layer crossed by a fault triggers an earthquake

Modeling the effects of wastewater injection

The Nazca plate moves eastwards with a rate of 6.6 cm per year.

Residual strain despite mega earthquake

The number of earthquakes striking south-central Kansas has skyrocketed

Geologists report new discoveries about Kansas, Oklahoma earthquakes

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