Over the past 5 years, parts of Oklahoma have experienced marked increases in the number of small- to moderate-sized earthquakes. In three study areas that encompass the vast majority of the recent seismicity, we show that the increases in seismicity follow 5- to 10-fold increases in the rates of saltwater disposal. Adjacent areas where there has been relatively little saltwater disposal have h...

Motivated by the Holocene history of great Cascadia earthquakes proposed by Goldfinger et al. (2012), we developed a simple model by which we can examine this further. Combining their observation that the plate boundary ruptures in four characteristic segment types with an empirical area versus seismic moment relation and an assumption of constant stress drop, we obtain a model for the along-st...

Between November 2009 and September 2011, temporary seismographs deployed under the EarthScope USArray program were situated on a 70-km grid covering the Barnett Shale in Texas, recording data that allowed sensing and locating regional earthquakes with magnitudes 1.5 and larger. I analyzed these data and located 67 earthquakes, more than eight times as many as reported by the National Earthquak...

Hydrologic responses to earthquakes, including liquefaction, changes in stream and spring discharge, changes in the properties of groundwater such as geochemistry, temperature and turbidity, changes in the water level in wells, and the eruption of mud volcanoes, have been documented for thousands of years. Except for some water-level changes in the near field which can be explained by poroelast...

Post-traumatic stress disorder (PTSD) can arise from different traumatic incidents, such as war, torture, being kidnapped or held captive, mugging, child abuse, road accidents, train wrecks, plane crashes as well as natural disasters like earthquakes and floods. During each disaster, both victims and rescue workers are vulnerable to physical and psychological trauma that may lead to different f...

The records of multiple Love and Rayleigh waves of the Alaska earthquake of 1964 were recovered from the 30-100 seismograph records at the WWSSN stations. The seismograms were equalized to a propagation distance of 9rr/2 (equivalent to G5 and R5 at • -r/2). These seismograms were compared with synthetic seismograms for radiation pattern and amplitude to estimate various source parameters. The s...

Multi sensor data available through remote sensing satellites provide information about changes in the state of the oceans, land and atmosphere. Recent studies have shown anomalous changes in oceans, land, atmospheric and ionospheric parameters prior to earthquakes events. This paper introduces an innovative data mining technique to identify precursory signals associated with earthquakes. The p...

Abstract The installation of dense seismometer arrays in Japan approximately 20 years ago has led to the discovery deep low-frequency tremors, which are oscillations clearly different from ordinary earthquakes. As such tremors may be related large earthquakes, it is an important issue seismology investigate that occurred before establishing arrays. We use learning aiming detect evidence past se...