Short-period Spectral Level of Intraplate and Interplate Earthquakes Occurring off Miyagi Prefecture

Generation Mechanism of Giant Earthquakes in Subduction Zones with Smaller-Size Interplate Earthquakes During Interseismic Period

Intraplate Triggered Earthquakes: Observations and Interpretation

We present evidence that at least two of the three 1811–1812 New Madrid, central United States, mainshocks and the 1886 Charleston, South Carolina, earthquake triggered earthquakes at regional distances. In addition to previously published evidence for triggered earthquakes in the northern Kentucky/southern Ohio region in 1812, we present evidence suggesting that triggered events might have occ...

Flexure of the Indian Plate and Intraplate Earthquakes

The flexural bulge in central India resulting from India's collision with Tibet has a wavelength of approximately 670 km. It is manifest topographically and in the freeair gravity anomaly and the geoid. Calculations of the stress distribution within a flexed Indian plate reveal spatial variations throughout the depth of the plate and also a function of distnace from the Himalaya. The wavelength...

Temporal variation of large intraplate earthquakes in coupled subduction zones

The focal mechanisms of intraplate earthquakes within subducting lithosphere are frequently used to infer large-scale stress regimes induced by slab-pull, bending or unbending, and lateral segmentation and undulations of the slab . Numerous studies have further postulated that the intraplate activity is influenced by transitory regional stress regimes such as those associated with interplate th...

Intraplate and interplate faulting interactions during the August 31, 2012, Philippine Trench earthquake (Mw 7.6) sequence

[1] On August 31, 2012, a large (Mw 7.6) thrust earthquake occurred within the subducting Philippine Sea plate seaward of a low seismicity region of the plate boundary (9.5 N– 11.5 N), possibly as a result of horizontal compressional stress accumulation offshore of a locked megathrust. The mainshock ruptured from 30–50 km depth, with high radiated-energy/seismic-moment ratio and enriched shortp...