Large slip, long duration, and moderate shaking of the Nicaragua 1992 tsunami earthquake caused by low near-trench rock rigidity
Valentı́ Sallarès, Manel Prada, Sebastián Riquelme, Adriá Meléndez, Alcinoe Calahorrano, Ingo Grevemeyer, César R. Ranero
Abstract
7.7 1992 Nicaragua tsunami earthquake to estimate a property-compatible finite fault solution. The obtained self-consistent model accounts for trenchward increasing slip, constrains stress drop, and explains key tsunami earthquake characteristics such as long duration, high-frequency depletion, and magnitude discrepancy. The confirmation that these characteristics are all intrinsic attributes of shallow rupture opens new possibilities to improve tsunami hazard assessment.
Topics & Concepts
SubductionTrenchSeismologyGeologySlip (aerodynamics)Episodic tremor and slipRigidity (electromagnetism)Tsunami earthquakeTectonicsMaterials sciencePhysicsComposite materialThermodynamicsLayer (electronics)earthquake and tectonic studiesHigh-pressure geophysics and materialsGeological and Geochemical Analysis