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Earth's Stress Change Database download

2017-11-05

This is a preliminary database of loading-induced stress changes on the Earth from 2000 to 2017 in a global scale and at various depths. Five loading forces that would generate stress changes on the Earth are considered: hydrological loading, atmospheric pressure, ocean water (including tides and non-tidal variation), solid Earth tides and postglacial rebound (PGR). The loading forces are quantified using the terrestrial water storage (TWS) inferred from GRACE solutions, the ECMWF surface atmospheric pressure model, the TPXO 7.2 ocean tide solutions, CMEMS sea level anomaly model, tidal forces computed by the SPOTL package, and the ICE-5G glacial history model, respectively. The loading masses are assumed to distribute within a thin layer (relative to the Earth’s radius) on the Earth’s surface, and are used to calculate the Earth’s stress responses through a spherical spectral method. Based on the different time scales of the loading forces, an incompressible viscoelastic Earth model is adopted for PGR and a compressible elastic one is adopted for the other forces.

The stress database could motivate more comprehensive studies to seek clearer physical insights on triggering mechanisms of various tectonic events, such as earthquake, non-volcano tremor, slow slip event and volcano. The physical framework we have established in the stress calculation could be a useful tool for updating and improving the stress estimates in the future and could facilitate more comprehensive studies of elastic/viscoelastic parameters and physical states of the Earth’s interior at various time scales and length scales.

Please refer to the article in the reference list for more details about the methods and the parameters used in the stress calculation.

Welcome to use the database. Please click here to redirect to the download website. If you have trouble clicking the link, please copy and paste this website address to your browser’s address bar: http://dx.doi.org/10.7910/DVN/2EHVUP

If you have any questions or suggestions about the database, welcome to contact Zhou Lu (luzhou@mail.ustc.edu.cn) or Hang Yi (yihang@xcu.edu.cn).

Reference:

Lu, Z., Yi, H., & Wen, L. (2018). Loading-induced Earth’s stress change over time. Journal of Geophysical Research: Solid Earth, in revision.

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