@article{db6486fb161e4b1c89396ed510adc152,
title = "GRACE gravitational measurements of tsunamis after the 2004, 2010, and 2011 great earthquakes",
abstract = "The 2004 Sumatra, 2010 Maule, and 2011 Tohoku great earthquakes triggered tsunamis as large as a few decimeters over a few 100 km in the open ocean. The transient ocean mass redistribution propagating as tsunamis changed the Earth{\textquoteright}s gravity field enough to perturb the GRACE satellites{\textquoteright} orbits at ~ 500 km above the surface. The on-board microwave ranging system detected inter-satellite acceleration anomalies of up to 1.0–4.0 nm/s2. There is good agreement between GRACE measurements and tsunami models for the three events. Complementarily to buoys, ocean bottom pressure sounders, and satellite altimeters, GRACE is sensitive to the long-wavelength spatial scale of tsunamis and provides an independent source of information for assessing alternate early earthquake and tsunami models. Our study demonstrates an innovative way of applying GRACE and GRACE Follow-On data to detect transient geophysical mass changes which cannot be observed by the conventional monthly Level-2 and mascon solutions.",
keywords = "Earthquake, GRACE, GRACE Follow-On, LOS gravity difference, Transient signals, Tsunami",
author = "Khosro Ghobadi-Far and Han, {Shin Chan} and S{\'e}bastien Allgeyer and Paul Tregoning and Jeanne Sauber and Saniya Behzadpour and Torsten Mayer-G{\"u}rr and Nico Sneeuw and Emile Okal",
note = "Funding Information: This work was funded by The University of Newcastle to support NASA{\textquoteright}s GRACE and GRACE Follow-On projects as an international science team member to the missions and by an Australian Research Council Discovery Grant (DP170100224). Science team funding was provided by NASA (GRACERFO19-0010) to Jeanne Sauber. Tsunami simulations were undertaken with the assistance of the resources and services from the National Computational Infrastructure (NCI), Project tz21, which is supported by the Australian Government. Funding Information: This work was funded by The University of Newcastle to support NASA{\textquoteright}s GRACE and GRACE Follow-On projects as an international science team member to the missions and by an Australian Research Council Discovery Grant (DP170100224). Science team funding was provided by NASA (GRACERFO19-0010) to Jeanne Sauber. Tsunami simulations were undertaken with the assistance of the resources and services from the National Computational Infrastructure (NCI), Project tz21, which is supported by the Australian Government. Publisher Copyright: {\textcopyright} 2020, The Author(s).",
year = "2020",
month = jul,
day = "1",
doi = "10.1007/s00190-020-01395-3",
language = "English (US)",
volume = "94",
journal = "Journal of Geodesy",
issn = "0949-7714",
publisher = "Springer Verlag",
number = "7",
}