Constraints on mantle anelasticity from geodetic observations, and implications for theJ2anomaly
نویسندگان
چکیده
منابع مشابه
Constraints on Mantle Anelasticity from SLR Tidal Estimates
Satellite Laser Ranging (SLR) measurements of the Earth’s gravity field can be used to solve for solid Earth tides. We use those solutions to place constraints on anelasticity in the Earth’s mantle at periods of 12 hours and 18.6 years. The results imply that the anelastic parameter Q is smaller for those tides than for seismic waves. We interpret this as evidence that Q is frequency dependent....
متن کاملVelocity dispersion due to anelasticity; implications for seismology and mantle composition
The concept of a relaxation spectrum is used to compute the absorption and dispersion of a linear anelastic solid. The Boltzmann aftereffect equation is solved for a solid having a linear relationship between stress and strain and their first time derivatives, the 'standard linear solid', and having a distribution of relaxation times. The distribution function is chosen to give a nearly constan...
متن کاملConstraints on continued episodic inflation at Long Valley Caldera, based on seismic and geodetic observations
[1] Long Valley Caldera, a large and potentially explosive silicic system, has experienced highly anomalous continued inflation since late 1970s. We characterize an episode of rapid episodic uplift occurring between 2002 and 2003 following similar episodes of 1979–1980, 1983, 1989–1990, and 1997–1998. This most recent episode was the first to be observed by a dense array of 13 continuous Global...
متن کاملElastic and Viscous Anisotropy in Earth’s mantle – Observations and Implications
In this thesis I address the topic of anisotropy – the directional dependence of physical properties of rocks – from two complementary angles: I use seismic anisotropy to detect deformation in the mantle, and I demonstrate the importance of accounting for rheological anisotropy in mantle flow models. The observations of seismic anisotropy in the Earth’s interior allow geophysicists to probe the...
متن کاملSpace Geodetic Observations and Modeling of 2016 Mw 5.9 Menyuan Earthquake: Implications on Seismogenic Tectonic Motion
Determining the relationship between crustal movement and faulting in thrust belts is essential for understanding the growth of geological structures and addressing the proposed models of a potential earthquake hazard. A Mw 5.9 earthquake occurred on 21 January 2016 in Menyuan, NE Qinghai Tibetan plateau. We combined satellite interferometry from Sentinel-1A Terrain Observation with Progressive...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2006
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2006.02915.x