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Cerro Negro

Negro, Cerro

Cono piroclastico · Nicaragua · 728 m

Cerro Negro, the largest and youngest of a group of four cinder cones that were constructed along a N-S line, is Central America's youngest volcano. Since its formation in 1850, Cerro Negro has produced frequent explosive eruptions, building a 250-m-high cinder cone surrounded by a fresh lava field. This 1995 photo from the southernmost of the older cones to the NNE shows flow levees and lava flows at the left side of Cerro Negro that were produced during the 1995 eruption. The vegetated peak in the background is part of the Las Pilas complex.
Cerro Negro, the largest and youngest of a group of four cinder cones that were constructed along a N-S line, is Central America's youngest volcano. Since its formation in 1850, Cerro Negro has produced frequent explosive eruptions, building a 250-m-high cinder cone surrounded by a fresh lava field. This 1995 photo from the southernmost of the older cones to the NNE shows flow levees and lava flows at the left side of Cerro Negro that were produced during the 1995 eruption. The vegetated peak in the background is part of the Las Pilas complex. · Foto: Photo by Britt Hill, 1995 (Southwest Research Institute). · Wikimedia Commons
Tipo
Cono piroclastico
Paese
Nicaragua
Regione
Middle America-Caribbean Volcanic Regions / Central America Volcanic Arc
Altitudine
728 m
Coordinate
12.506, -86.702
Ultima eruzione
1999
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Minor
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Nicaragua's youngest volcano, Cerro Negro, was created following an eruption that began in April 1850 about 2 km NW of the summit of Las Pilas volcano. It is the largest, southernmost, and most recent of a group of four youthful cinder cones constructed along a NNW-SSE-trending line in the central Marrabios Range. Strombolian-to-subplinian eruptions at intervals of a few years to several decades have constructed a roughly 250-m-high basaltic cone and an associated lava field constrained by topography to extend primarily NE and SW. Cone and crater morphology have varied significantly during its short eruptive history. Although it lies in a relatively unpopulated area, occasional heavy ashfalls have damaged crops and buildings.

Sintesi da Wikipedia

Riassunto in inglese

Cerro Negro is an active volcano in the Cordillera de los Maribios mountain range in Nicaragua, about 10 km (6.2 mi) from the village of Malpaisillo. It is a very new volcano, the youngest in Central America, having first appeared in April 1850. It consists of a gravelly basaltic cinder cone, which contrasts greatly with the surrounding verdant hillsides, and gives rise to its name, which means Black Hill. Cerro Negro has erupted frequently since its first eruption. One unusual aspect of several eruptions has been the emission of ash from the top of the cone, while lava erupts from fractures at the base.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1850~1865 · 1 eruzioni · VEI max. 21865~1880 · 1 eruzioni · VEI max. 21895~1910 · 1 eruzioni · VEI max. 21910~1925 · 3 eruzioni · VEI max. 31925~1939 · 1 eruzioni · VEI max. 21939~1954 · 5 eruzioni · VEI max. 31954~1969 · 8 eruzioni · VEI max. 31969~1984 · 1 eruzioni · VEI max. 31984~1999 · 3 eruzioni · VEI max. 318501880192519541984

Cronologia dettagliata

  1. 1999VEI 2Osservata
    1999-08-05 – 1999-08-07
    South flank (near Cristo Rey crater)
  2. 1995VEI 2Osservata
    1995-05-29 – 1995-12-06
  3. 1992VEI 3Osservata
    1992-04-09 – 1992-04-14
  4. 1971VEI 3Osservata
    1971-02-03 – 1971-02-14
    Summit and east flank
  5. 1969VEI 1Osservata
    1969-12-19 – 1969-12-29
  6. 1968VEI 3Osservata
    1968-10-23 – 1968-12-10
    Summit and south flank
  7. 1964VEI 2Stima geologica
    1964-07-02 – In corso
  8. 1963VEI 1Osservata
    1963-03-16 – In corso
  9. 1962VEI 2Osservata
    1962-03-21 – 1962-04-16
  10. 1961VEI 1Osservata
    1961-10-25 – In corso
    NE-flank fissure
  11. 1960VEI 3Osservata
    1960-09-28 – 1960-12-26
    Summit and south flank
  12. 1957VEI 2Osservata
    1957-09-04 – 1957-09-24
    Summit and east flank
  13. 1954VEI 2Osservata
    1954-02-16 – 1954-02-16
  14. 1950VEI 3Osservata
    1950-11-21 – 1950-12-17
  15. 1949VEI 2Osservata
    1949-06 – 1949-06
  16. 1948VEI 2Osservata
    1948-03-31 – In corso
  17. 1947VEI 3Osservata
    1947-07-09 – 1947-08-02
    Summit and NE flank
  18. 1929VEI 2Osservata
    1929-02-10 – 1929-03
  19. 1923VEI 3Osservata
    1923-10-23 – 1923-12-11
    Summit and upper north flank
  20. 1919VEI 2Osservata
    1919-06-20 – 1919-06-30
  21. 1914VEI 2Osservata
    1914-10-28 – 1914-11-03
  22. 1899VEI 2Osservata
    1899-11-22 – 1899-11-29
  23. 1867VEI 2Osservata
    1867-11-14 – 1867-11-30
    NE-SW-trending fissure
  24. 1850VEI 2Osservata
    1850-04-13 – 1850-05-27

Link esterni

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