A5060524506- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Geological and Geophysical Studies
National Institute of Hospital Administration
2024
SUMMARY Ocean water mass redistributions triggered by earthquakes result in notable changes the gravity potential field. These oceanic effects can be quantified using two primary methods: solving sea level equation (SSLE) and Bouguer layer approximation (BLA). The SSLE accounts for both direct attraction elastic loading response induced perturbed ocean during an earthquake. In contrast, BLA disregards effect utilizes correction formula to estimate impact of attraction. this study, we...
Abstract Viscoelastic dislocation theory is important to understanding fundamental geodynamics and validating numerical models in the study of earthquake deformation. Available mathematical solutions differ assumed Earth geometry formulation gravity terms, but main challenge they commonly face Inverse Laplace Transform (ILT). Limitations previously used ILT methods tend degrade performance and/or accuracy solutions. To overcome these limitations, we have derived new Green's functions for a...
Summary The Gravity Recovery and Climate Experiment (GRACE) satellites have observed mass migrations caused by megathrust earthquakes. Extracting earthquake-related signals from GRACE data is still a challenge due to the interference non-earthquake sources such as terrestrial hydrology. Instead of reducing hydrological potentially biased models, in this study we apply model-free technique independent component analysis (ICA), separate earthquake non-Gaussian data. We elucidate principles...
The Mw 7.8 2012 Haida Gwaii earthquake and the 7.5 2013 Craig occurred along Queen Charlotte transpressive margin, two months 340 km apart. On near Vancouver Island, hundreds of kilometres southeast events, many continuous Global Navigation Satellite Systems sites underwent no discernable coseismic motion but up to 1 cm postseismic (away from epicenters) which lasted for only 2 – 3 years. To resolve signal earthquakes, we used a minimum four years measurements before remove longer-term these...
Abstract Antarctica is renowned for its ancient cratons, difficult‐to‐observe sutures and active continental rifts. Detailed lithospheric structure strength estimates are crucial understanding the potential distribution, long‐term geological evolution, deformation patterns of this continent. The Antarctic continent investigated based on joint modeling elevation geoid data with incorporation seismic thermal constraints. Moreover, these results used to infer yield envelopes across Antarctica....