Currently, monitoring at these levels is not standard across Texas or the United States.
For assessing the earthquake cause, our research underscores the necessity of monitoring subsurface wastewater formation pressures and monitoring earthquakes having magnitudes of ∼M2 and greater. On the basis of modelling results and the absence of historical earthquakes near Azle, brine production combined with wastewater disposal represent the most likely cause of recent seismicity near Azle. In contrast, pore-pressure models demonstrate that a combination of brine production and wastewater injection near the fault generated subsurface pressures sufficient to induce earthquakes on near-critically stressed faults. Analysis of both lake and groundwater variations near Azle shows that no significant stress changes were associated with the shallow water table before or during the earthquake sequence. Here we assess whether it is plausible that human activity caused these earthquakes. Links to earthquake-related information for each state.In November 2013, a series of earthquakes began along a mapped ancient fault system near Azle, Texas. Information by state, and world seismicity maps. Use real-time web services for your own applications. Get real-time earthquake notifications sent to you on your phone or by email, or subscribe to real-time feeds. Real-time Notifications, Feeds, and Web Services Various output formats, and links to earthquake details. View historic seismicity, find past earthquakes that meet your criteria.
USGS and non-USGS collections of earthquake-related features and effects and shaking damage. Special Earthquakes, Earthquake Sequences, and Fault ZonesĬompilations of information about significant earthquakes, swarms or sequences, and fault zones of interest. Largest earthquakes, significant events, lists and maps by magnitude, by year, or by location. Tap/click on "gear icon" for options and settings.
Photo by Peter Haeussler, USGS, November 9, 2002. Peter Haeussler prepares to measure the offset of a crevasse on the Canwell Glacier, Alaska, USA.
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