The Erebus stratovolcano has undergone at least one or two caldera formations. The magma source beneath Erebus is sometimes described as a plume rising from the upper mantle at velocities of around 6 cm per year. This area is a rift zone where extension takes place and has thinned the crust to 20 km and allows magma to rise. Erebus volcano is an intraplate volcano and belongs to the McMurdo Volcanic Group, located in the so-called Terror Rift, which is part of the West Antarctic Rift System. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Mount Erebus Volcano Observatory (MEVO) homepageįeatured image: Mount Erebus on December 5, 2014.Continuous lava-lake activity with minor explosions, punctuated by occasional larger strombolian explosions that eject bombs onto the crater rim, has been documented since 1972, but has probably been occurring for much of the volcano's recent history. The glacier-covered volcano was erupting when first sighted by Captain James Ross in 1841. An elliptical 500 x 600 m wide, 110-m-deep crater truncates the summit and contains an active lava lake within a 250-m-wide, 100-m-deep inner crater. The summit of the dominantly phonolitic Mount Erebus has been modified by one or two generations of caldera formation.Ī summit plateau at about 3200-m altitude marks the rim of the youngest caldera, which formed during the late-Pleistocene and within which the modern cone was constructed. The 3794-m-high Erebus is the largest of three major volcanoes forming the crudely triangular Ross Island. Mount Erebus, the world's southernmost historically active volcano, overlooks the McMurdo research station on Ross Island. This camera is currently sending a new image every five minutes and will keep updating as long as solar and wind power allows. MEVO is developing solutions to bring year-round imagery, and new installations will be reported on their facebook page. Imagery from Erebus is available primarily during December and January, during the height of the Austral Summer and Erebus field season. Erebus (created by Caldwell (1989), modified by Harpel (2000). Simplified geologic map of the summit caldera of Mt. Erebus edifice will be mapped in the near future, according to MEVO. It is unlikely that other portions of the Mt. Later, Harpel (2000) modified the stratigraphic relationships of the mapped flows using the 40Ar/39Ar dating technique.īelow is the simplied geologic map from Caldwell (1989) and Harpel (2000). Caldwell (1989) identified, mapped and geochemically analyzed over a dozen individual lava flows within the summit caldera. Erebus, however, does have significantly more rock outcrop than lower elevations. Erebus, and most other Antarctic volcanoes, difficult. Lack of outcrop exposure due to snow and ice cover make geologic mapping on Mt. The Mount Erebus volcanic edifice has not been geologically mapped to the degree many other volcanoes of the world have been, MEVO explains. In addition, infrequent small ash eruptions took place at a vent adjacent to the lava lake." "MEVO reported that as of November 23, 2001, frequent Strombolian eruptions (~1-10 per day) occurred from a persistent ~15-m-diameter summit lava lake at Erebus. Previous addition was during the week of November 21 – 27, 2001: The eruption sizes were based on comparisons of seismic data for known Erebus eruptions." Erebus activity log, several "small- to medium-sized" eruptions occurred during 12-18 October, with a "very large" eruption occurring on 14 October. The last time this volcano appeared in GVP's weekly volcanic reports was during the week of October 12 – 18, 2005:
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