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Relative vertical deformation

QEFS Stress Module calculates global crustal deformation and stress from available earthquake focal mechanisms (CMT catalog, https://www.globalcmt.org) as described in Žalohar et al. (2020a, 2020b). The global crustal deformation and stress are calculated with 1-degree resolution.

The relative thickening of the Earth’s crust is expected in the case of reverse faulting (in the compressional stress regime, red color), while the relative thinning is expected in the case of the normal faulting (in the extensional stress regime, blue color). No vertical deformation is expected in the case of the strike-slip faulting (green color). The range of the normalized relative vertical deformation is defined between -1 to 1. 

M4.5 earthquakes from the CMT catalog are illustrated with the beach balls. 

Read more about the precursory stress changes before large earthquake here and about the breather type oscillations of the global tectonic shear stress fields here.

 

References:

  • Žalohar, J., Vičič, B., Potočnik, M., Soklič, N., Komac, M., Hölscher, T., Herlec, U., Dolenec, M., 2020a. Breather-type oscillations of the global tectonic shear stress fields. Journal of Structural Geology. 140, 104185. https://doi.org/10.1016/j.jsg.2020.104185.
  • Žalohar, J., Vičič, B., Potočnik, M., Soklič, N., Komac, M., Hölscher, T., Herlec, U., Dolenec, M., 2020b. Precursory stress changes before large earthquakes; on a new physical law for earthquakes. Journal of Structural Geology. https://doi.org/10.1016/j.jsg.2020.104208.