Imbabura

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.258°N
  • 78.183°W

  • 4609 m
    15118 ft

  • 352004
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

28 September-4 October 2005

A cluster of earthquakes that had been recorded at Cayambe since 16 September, with about 300 small earthquakes occurring during 16-18 September, decreased in number significantly after 19 September. During 19-25 September, an average of 5.3 earthquakes occurred daily.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Index of Weekly Reports


2005: September
2004: February
2003: November

Weekly Reports


28 September-4 October 2005

A cluster of earthquakes that had been recorded at Cayambe since 16 September, with about 300 small earthquakes occurring during 16-18 September, decreased in number significantly after 19 September. During 19-25 September, an average of 5.3 earthquakes occurred daily.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)


14 September-20 September 2005

During 16-18 September, a cluster of 330 small earthquakes occurred at Cayambe. The earthquakes reached a maximum magnitude of 3.6. They occurred on the volcano's SW flank, where previous clusters had been located. The cluster had not reached the level of one that took place in March of 2004. IG reported that these types of clusters occur fairly regularly at Cayambe and could be related to changes in the internal pressure of the volcano. The earthquakes continued through at least 19 September.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)


18 February-24 February 2004

On 29 January a swarm of ~148 small volcano-tectonic earthquakes occurred at Cayambe. By 1 February seismicity had decreased, reaching "normal" base levels. IG reported that the swarm may have represented an increase in the internal pressure of the volcano due to the arrival of fluid, possibly magma.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)


12 November-18 November 2003

During 3-9 November, about nine earthquakes occurred per day at Cayambe, near the daily average since August 2003 and about twice the daily average of 4 per day before that. Seismicity also included small clusters of tectonic earthquakes with magnitudes less than 3. There were reports of a strong scent of sulfur in the sector of Picos Jarrína at an elevation of ~5,460 m. The scent was strongest near cracks.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)


The Global Volcanism Program has no Bulletin Reports available for Imbabura.

Imbabura volcano rises to the north above scenic Laguna de San Pablo in the Interandean valley about 60 km north of Quito. The main edifice, Taita Imbabura ("Father Imbabura") forms the summit, with Huarmi Imbabura ("Imbabura's Son") forming a lateral lava-dome complex on the SW flank. Activity at the Pleistocene Imbabura I edifice constructed a large andesitic stratovolcano and ended prior to about 43,000 years ago with a major collapse that produced a debris avalanche that traveled 16 km to the north. Subsequent growth of the Imbabura II stratovolcano continued at least into the early Holocene and typically consisted of growth and collapse of large-volume dacitic lava domes. A major eruption about 25,000 years ago produced a debris avalanche and possible lateral blast and was followed by growth of the Huarmi Imbabura lava dome. Historical reports of eruptions consisted of only mudflows and rock slides.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
5550 BCE ± 500 years Unknown Confirmed   Radiocarbon (uncorrected) Huarmi Imbabura

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.



Cones
Feature Name Feature Type Elevation Latitude Longitude
Plancha Ladera Cone 0° 14' 0" N 78° 7' 0" W


Domes
Feature Name Feature Type Elevation Latitude Longitude
Cubilche, Loma Dome 3836 m 0° 14' 2" N 78° 8' 2" W
Cunru Dome 3304 m 0° 14' 0" N 78° 6' 0" W
Huarmi Imbabura Dome 3927 m 0° 14' 10" N 78° 11' 42" W
Tiata Imbabura Dome 4609 m 0° 15' 27" N 78° 10' 58" W
Imbabura volcano rises above the town of San Pablo del Lago in this aerial view from the south. The tip of Laguna de San Pablo is visible at the left. The main edifice, Taita Imbabura ("Father Imbabura"), forms the summit. Huarmi Imbabura ("Imbabura's Son") is a lateral lava-dome complex forming the grassy shoulder on the SW flank directly above the town of San Pablo del Lago in this view. Activity at the dominantly Pleistocene Imbabura volcano continued into at least the early Holocene.

Photo by Patricio Ramon (Instituto Geofisca, Escuela Politecnica Nacional).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. 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.

Beate B, 1992. . (pers. comm.).

Hall M L, 1992. . (pers. comm.).

Hall M L, 1977. El Volcanismo en El Ecuador. Quito: Biblioteca Ecuador, 120 p.

Hall M L, Mothes P A, 2008b. Volcanic impediments in the progressive development of pre-Columbian civilizations in the Ecuadorian Andes. J Volc Geotherm Res, 176: 344-355.

Le Pennec J-L, Ruiz-P A G, 2006. Late Pleistocene to Holocene activity of Imbabura volcano. Cities on Volcanoes 4, Quito, Ecuador, 23-27 Jan, 2006, Field trip C2: 1-8.

Volcano Types

Compound
Lava dome(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Andesite / Basaltic Andesite
Dacite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
538
96,294
477,043
3,245,887

Affiliated Databases

Large Eruptions of Imbabura Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.