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Updated: Aug 23, 2025

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Los mayores cráteres de impacto recientes en Marte: imágenes orbitales y coinvestigación sísmica de superficie
L V Posiolova1, P Lognonné2, W B Banerdt3
1Malin Space Science Systems, San Diego, CA, USA.
Resumen
Dos grandes cráteres de impacto fueron descubiertos en Marte en 2021, causando eventos sísmicos significativos. Un impacto reveló hielo de agua en una latitud sin precedentes, ofreciendo nuevos conocimientos sobre la geología marciana y la composición del subsuelo.
Área de la Ciencia:
- Ciencias planetarias
- La geofísica
- Astrogeología
Sus antecedentes:
- El Mars Reconnaissance Orbiter (MRO) ha estado observando a Marte durante 16 años.
- La misión de aterrizaje InSight registró datos sísmicos durante 3 años.
- El cráter de impacto es un proceso geológico significativo en Marte.
Objetivo del estudio:
- Para analizar dos grandes cráteres de impacto descubiertos a finales de 2021.
- Para investigar la partición de energía de los eventos de impacto en Marte.
- Para probar los modelos sísmicos del interior marciano usando eventos de impacto conocidos.
Principales métodos:
- Utilizando imágenes orbitales del Mars Reconnaissance Orbiter.
- Analizando los datos de movimiento sísmico del módulo InSight.
- Correlación de los eventos de impacto con las firmas sísmicas y los hallazgos geológicos.
Principales resultados:
- Descubrimiento de dos cráteres de impacto frescos más grandes (> 130 m de diámetro) desde que comenzaron las operaciones de MRO.
- Los impactos generaron eventos sísmicos > de magnitud 4, entre los más grandes registrados por InSight.
- Excavación de bloques de hielo de agua a 35°N de latitud, el más bajo observado en Marte.
Conclusiones:
- El estudio ofrece una oportunidad única para estudiar los procesos de impacto en un planeta con una atmósfera delgada.
- Las pruebas directas de modelos sísmicos del interior profundo de Marte ahora son posibles con parámetros de eventos conocidos.
- El descubrimiento de hielo subterráneo en latitudes bajas tiene implicaciones significativas para la comprensión de la hidrología marciana y la potencial habitabilidad.
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