The 2021 August 14 MW 7.2 Nippes, Haiti earthquake occurred 75 km west of the epicenter of the 2010 Leogane earthquake (Haiti) on the transpressive Caribbean - North America plate boundary. We present an updated fault map for Hispaniola and model coseismic and early postseismic fault slip using Interferometric Synthetic Aperture Radar and pixel offsets. We find the earthquake ruptured multiple segments of the Enriquillo-Plantain Garden Fault Zone. Slip occurred in two main sub-events on either side of a restraining bend at Pic Macaya, with ∼2.7 m of peak reverse-slip east of the bend. To the west, slip jumps the restraining bend and further ruptures with ∼1.2 m of left-lateral slip. Afterslip in the 4 days following the event occurred at shallow depth and adjacent to the coseismic rupture areas and reached the surface east of Pic Macaya.
J. Maurer et al., "Complex Rupture and Triggered Aseismic Creep during the 14 August 2021 Haiti Earthquake from Satellite Geodesy," Geophysical Research Letters, vol. 49, no. 11, article no. e2022GL098573, Wiley; American Geophysical Union, Jun 2022.
The definitive version is available at https://doi.org/10.1029/2022GL098573
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
complex rupture; earthquake; geodesy; Haiti; InSAR; tectonics
International Standard Serial Number (ISSN)
Article - Journal
© 2023 Wiley; American Geophysical Union, All rights reserved.
16 Jun 2022