1. Distribution of earthquakes on the Earth 2. Reasons for earthquakes in the Earth's crust 3. Types of the Earth's lithosphere and Plate Tectonics 4. Types of seismic waves 5. Measurement of the size of an earthquake 6. The models of earthquake source 7. Nature of deep (mantle) earthquakes 8. Earthquake recurrence interval study 9. Earthquakes as a motor for geodynamic processes 10. Correspond...

Using a catalog of seismicity for Southern California, we measure how the number of triggered earthquakes increases with the earthquake magnitude. The trade-off between this relation and the distribution of earthquake magnitudes controls the relative role of small compared to large earthquakes. We show that seismicity triggering is driven by the smallest earthquakes, which trigger fewer events ...

This paper inspects possible influence of solar cycles on earthquakes through of statistical analyses. We also discussed the mechanism that would drive the occurrence of increasing of earthquakes during solar maxima. The study was based on worldwide earthquakes events during approximately four hundred years (16002010).The increase of earthquakes events followed the Maxima of Solar cycle, and al...

[1] Over 109 small earthquakes (Mw 0.4–3.9) were detected during January 2011 to February 2012 in the Youngstown, Ohio area, where there were no known earthquakes in the past. These shocks were close to a deep fluid injection well. The 14 month seismicity included six felt earthquakes and culminated with aMw 3.9 shock on 31 December 2011. Among the 109 shocks, 12 events greater than Mw 1.8 were...

Low-frequency earthquakes (LFEs) are small repeating earthquakes that occur in conjunction with deep slow slip. Like typical earthquakes, LFEs are thought to represent shear slip on crustal faults, but when compared to earthquakes of the same magnitude, LFEs are depleted in high-frequency content and have lower corner frequencies, implying longer duration. Here we exploit this difference to est...

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...

There is a need for routine measurements of infrasound from earthquakes, in conjunction with modeling, to better constrain our understanding of the generation of infrasound from earthquakes, in particular the effect of source depth. Here, we first outline a systematic search for infrasound from earthquakes from a range of magnitudes. Based on our observations, earthquakes with Mw>~5 appear to b...

Since 1992, remotely triggered earthquakes have been identifi ed following large (M > 7) earthquakes in California as well as in other regions. These events, which occur at much greater distances than classic aftershocks, occur predominantly in active geothermal or volcanic regions, leading to theories that the earthquakes are triggered when passing seismic waves cause disruptions in magmatic o...

While the cyclic nature of tectonic strain build-up and release is at least conceptually well understood (known as earthquake cycle), it not clear how variable corresponding sizes time intervals between them are. Additional observations from past earthquakes are required to better constrain these aspects. In this context, we investigate roughness bedrock normal fault scarps along Mt. Vettore Ro...

Although earthquakes happen frequently in many parts of the world, any occurrence of a moderate to large event is sudden and unexpected. Thus, the earthquake process can be interesting and even frightening to people. Most earthquakes are associated with natural, dynamic processes that shape Earth’s landscape. The vast majority of earthquakes are caused by sudden slip along faults, resulting in ...