Mon Dec 15, F. Flechtner
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de M. Almeida, Yellinson, Henry Montecino C., França, George Sand, and Cuevas, Aharon S., 2026. Can hydrological loads modulate intraplate seismicity in the Parecis Basin, Brazil?. Journal of South American Earth Sciences, 169:105878, doi:10.1016/j.jsames.2025.105878.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2026JSAES.16905878D,
author = {{de M. Almeida}, Yellinson and Henry {Montecino C.} and {Fran{\c{c}}a}, George Sand and {Cuevas}, Aharon S.},
title = "{Can hydrological loads modulate intraplate seismicity in the Parecis Basin, Brazil?}",
journal = {Journal of South American Earth Sciences},
keywords = {Hydroseismicity, GRACE mission, GPS positioning, Intraplate earthquakes},
year = 2026,
month = jan,
volume = {169},
eid = {105878},
pages = {105878},
abstract = "{The processes responsible for triggering seismicity within intraplate
regions remain incompletely understood. One proposed driver of
such seismicity is the seasonal variation in hydrological loads,
which may influence both the frequency and magnitude of
earthquakes in these areas. In Brazil, the Parecis Basin has
exhibited persistent seismic activity over recent years, with
sporadic occurrences of earthquakes of considerable magnitude.
In this study, we analyzed a seismic catalogue spanning from
2014 to 2022 to investigate potential correlations between
seismicity and hydrological cycle in this region. We used
geodetic data{\textemdash}including GPS positioning and
satellite gravimetry{\textemdash}as well as precipitation
records. The correlations between these observations and
seismicity averaged {\ensuremath{-}}0.64 (TWSA-GRACE), 0.61 (VD-
GPS), and {\ensuremath{-}}0.53 (precipitation), indicating that
seismicity tends to increase in the Parecis Basin and adjacent
areas at the end of the dry season. Temporal analysis of phase
lags between hydrological indicators and seismic events suggests
that the modulation of seismicity is driven primarily by the
diffusion of pore pressure in the upper crust due to variations
in hydrological loading.}",
doi = {10.1016/j.jsames.2025.105878},
adsurl = {https://ui.adsabs.harvard.edu/abs/2026JSAES.16905878D},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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