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There are no activity reports for Nejapa-Miraflores.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1060 ± 100 years||Unknown||Confirmed||3||Tephrochronology||Nejapa maar|
|0550 BCE ± 500 years||Unknown||Confirmed||Tephrochronology||PM5 tephra|
|3050 BCE ± 500 years||Unknown||Confirmed||Tephrochronology||PM4 tephra|
|4390 BCE ± 100 years||Unknown||Confirmed||Radiocarbon (uncorrected)||El Hormigón|
|5230 BCE ± 200 years||Unknown||Confirmed||Radiocarbon (uncorrected)||TC tephra|
|5350 BCE ± 200 years||Unknown||Confirmed||Radiocarbon (uncorrected)||NNT tephra|
|7300 BCE ± 1000 years||Unknown||Confirmed||Tephrochronology||PM3 tephra|
|7430 BCE ± 300 years||Unknown||Confirmed||Radiocarbon (uncorrected)||Refinería crater|
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.
Bice D C, 1980. Tephra stratigraphy and physical aspects of recent volcanism near Managua, Nicaragua. Unpublished PhD thesis, Univ Calif Berkeley, 422 p.
Bice D C, 1985. Quaternary volcanic stratigraphy of Managua, Nicaragua; correlation and source assignment for multiple overlapping plinian deposits. Geol Soc Amer Bull, 96: 553-566.
Hradecky P, 1997. Estudio geologico para reconocimiento de riesgo natural y vulnerabilidad geologica en el area de Managua. Cesky Geologicky Ustav Praha, Instituto Nicaraguense de Estudios Territoriales, Managua (INETER), 81 p.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Incer J, 1987. . (pers. comm.).
McBirney A R, 1955b. The origin of the Nejapa pits near Managua, Nicaragua. Bull Volc, 17: 145-154.
Pardo N, Avellan D R, Macias J L, Scolamacchia T, Rodriguez D, 2008. The ~1245 yr BP Asososca maar: new advances on recent volcanic stratigraphy of Managua (Nicaragua) and hazard implications. J Volc Geotherm Res, 176: 493-512.
Pardo N, Macias J L, Giordano G, Cianfarra P, Avellan D R, Ballatreccia F, 2009. The ~1245 yr BP Asososca maar eruption: the youngest event along the Nejapa-Maraflores volcanic fault, western Managua, Nicaragua. J Volc Geotherm Res, 184: 292-312.
Rausch J, Schmincke H-U, 2010. Nejapa Tephra: The youngest (ca. 1 ka BP) highly explosive hydroclastic eruption in western Managua (Nicaragua). J Volc Geotherm Res, 192: 159-177.
Sapper K, 1925. The Volcanoes of Central America. Halle: Verlag Max Niemeyer, 144 p.
Smithsonian Institution-GVN, 1990-. [Monthly event reports]. Bull Global Volc Network, v 15-33.
Viramonte J G, Navarro Collado M, Malavasi Rojas E, 1997. Nicaragua-Costa Rica Quaternary volcanic chain. IAVCEI General Assembly, Puerto Vallarta, Mexico, January 19-24, 1997, Fieldtrip Guidebook, 17 p.
Walker J A, 1984. Volcanic rocks from the Nejapa and Granada cinder cone alignments, Nicaragua, Central America. J Petr, 25: 299-342.
The N-S-trending Nejapa-Miraflores alignment, located near the western margin of the Nicaraguan graben, cuts through the western part of Nicaragua's capital city, Managua. This alignment, which has erupted tholeiitic basaltic rocks similar to those from mid-ocean ridges, marks the right-lateral offset of the Nicaraguan volcanic chain. A series of pit craters and fissure vents extends into Lake Managua and is continuous with the volcanic vents on the Chiltepe peninsula. An area of maars and tuff cones perpendicular to the N-S trend of the lineament forms the scalloped shoreline of Lake Managua. Laguna Tiscapa crater is located several kilometers to the east near the central part of the city of Managua. The elongated Nejapa and Ticoma pit craters are surrounded by small basaltic cinder cones and tuff cones. The Nejapa-Miraflores alignment (also known as Nejapa-Ticoma) has been the site of about 40 eruptions during the past 30,000 years, the most recent of which (from Asososca maar) occurred about 1250 years ago.