Great earthquakes rarely occur within active accretionary prisms, despite the intense long-term deformation associated with the formation of these geologic structures. This paucity of earthquakes is often attributed to partitioning of deformation across multiple structures as well as aseismic deformation within and at the base of the prism (Davis et al., 1983). We use teleseismic data and satel...

Climate trends on timescales of 10s to 100s of millions of years are controlled by changes in solar luminosity, continent distribution, and atmosphere composition. Plate tectonics affect geography, but also atmosphere composition through volcanic degassing of CO2 at subduction zones and midocean ridges. So far, such degassing estimates were based on reconstructions of ocean floor production for...

This study examined the relationships between topographic structure and submarine geomorphology, sediment thickness, geophysical anomaly fields, geological settings tectonic lineament stretching of Arabian Sea region, Carlsberg Ridge morphology, Makran Trench depths by GMT. The included spatial analysis high-resolution datasets (GEBCO, EGM96, GlobSed) geomorphological modeling 300km-width cross...

Abstract. The towns of Pasni and Ormara were the most severely affected by 1945 Makran tsunami. water inundated land for almost 1 km at Pasni, engulfing 80 % huts town, while tsunami 2.5 km, washing away 60 huts. plate boundary between Arabian Plate Eurasian is marked subduction zone (MSZ). This in November was source a great earthquake (8.1 Mw) an associated Estimated death tolls, waves arriva...

Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffraction patterns and direct sample images. Measurements of length changes with an accuracy of one part in 104 are being developed and will provide a new ...

Several lines of evidence suggest that simple subduction with one downgoing and one overriding plate is an insufficient model of the Cascadia Subduction Zone. Instead, the subduction zone and arc are segmented, exhibiting variations in multiple characteristics along strike. One line of evidence comes from the analysis of seismicity. The subduction zone is atypical everywhere in that the Wadati-...

We show that a new subduction zone can initiate at a preexisting dipping fault zone with reasonable plate forces, consistent with what is observed in the western Pacific. The dynamics of subduction initiation within a viscoelastic medium has been systematically explored with the finite element method. We investigate the compression of oceanic lithosphere with hoth force and velocity boundary co...