Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Guaranteed tours:
26 Sep - 1 Oct 2018: Adventure Volcano - Yasur Volcano Travel - Tanna Island (Vanuatu)
26 Sep - 10 Oct 2018: Volcanoes and Cultures - Adventures in the South Sea - Vanuatu (South Sea)
30 Sep - 7 Oct 2018: Fascination Volcano - Santorini Island (Greece)
30 Sep - 10 Oct 2018: The Volcanoes of Ambrym - the Grand Traverse - Vanuatu (South Sea)
6-13 Oct 2018: Pearl of the Aegean - Santorini - Santorini Island, Greece
12-17 Oct 2018: Krakatau Volcano Special - Krakatau volcano, Sunda Strait
13-20 Oct 2018: Almonds, olives and volcanoes - Nisyros Island, Greece
13-29 Nov 2018: Volcano Special: Ibu - Dukono - Lokon - Halmahera (Indonesia)
17-30 Nov 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
8-21 Dec 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
: spaces available / : guaranteed / : few spaces left / : booked out
Random pictures

Sierra Negra volcano

shield volcano 1124 m / 3687 ft
Isabela Island, Galapagos, -0.83°S / -91.17°W
Current status: erupting (4 out of 5)
Sierra Negra webcams / live data | Reports
Sierra Negra volcano books
Last update: 19 Aug 2018 (fissure eruption with fountaining and lava flows)
Typical eruption style: mainly effusive
Sierra Negra volcano eruptions: 2018 (June), 2005 (Oct), 1979-80, 1963, 1957, 1954, 1953, 1948, 1911, 1860, 1844, 1817, 1813, 1350 ± 500 years, 1060 ± 500 years, 370 AD ± 1100 years, 1250 BC ± 100 years, 8250 BCE ± 1600 years
TimeMag. / DepthDistanceLocation
Mon, 20 Aug
Mon, 20 Aug 19:07 UTCM 3.2 / 5 km3 kmGALAPAGOS ISLANDS, ECUADOR
Thu, 9 Aug
Thu, 9 Aug 06:06 UTCM 3.7 / 6 km4 kmGALAPAGOS ISLANDS, ECUADOR
Sierra Negra is one of the largest and most active volcanoes in the Galapagos Islands. A typical shield volcano, it has an oval caldera, which measures 9 km east-west and 7 km north-south. It has produced at least 10 eruptions in historical times, with an average resting period of only 15 years between each eruptive period.
The last two eruptions occurred in 1979 and 2005 (as of early 2018).

Background:

The broad shield volcano of Sierra Negra at the southern end of Isabela Island contains a shallow 7 x 10.5 km caldera that is the largest in the Galápagos Islands. Flank vents abound, including cinder cones and spatter cones concentrated along an ENE-trending rift system and tuff cones along the coast and forming offshore islands.
The 1124-m-high volcano is elongated in a NE direction. Although it is the largest of the five major Isabela volcanoes, it has the flattest slopes, averaging less than 5 degrees and diminishing to 2 degrees near the coast. A sinuous 14-km-long, N-S-trending ridge occupies the west part of the caldera floor, which lies only about 100 m below its rim. Volcán de Azufre, the largest fumarolic area in the Galápagos Islands, lies within a graben between this ridge and the west caldera wall.
Lava flows from a major eruption in 1979 extend all the way to the north coast from circumferential fissure vents on the upper northern flank. Sierra Negra, along with Cerro Azul and Volcán Wolf, is one of the most active of Isabela Island volcanoes.
Source: GVP

Sierra Negra Photos:




Latest satellite images

More on VolcanoDiscovery:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint || Français | Deutsch
Follow us: